Dive Center Service Manual - PDF Free Download

2017 Dive Center Service Manual

2017 - revised 2017 INDEX-A INDEX - Mares Service Manual Contents Pag Last Note Vol revision INTRODUCTION I1 2017 NEW 2 MARES SERVICE MANUAL I1 2017 NEW 2 INTRODUCTION I2 2017 NEW 2 SYMBOLS I2 2017 NEW 2 TECHNICAL BULLETINS TECHNICAL INFORMATION S I3 2017 NEW 2 INDEX AND UPDATE I3 2017 NEW 2 Regulators FIRST STAGES 12S FIRST STAGE BTM 15 BTM 15 2015 2 BTM 17 BTM 17 2015 2 ITM 19 ITM 19 2015 2 ITM 24 ITM 24 2015 2 ITM 25 ITM 25 2015 2 ITM 29 ITM 29 2015 2 ITM 30 ITM 30 2015 2 ITM 37 ITM 37 2015 2 ITM 40 ITM 40 2015 2 BTM 25_R1 BTM 25_R1 2015 2 12S. REQUIRED TOOLS AND SUPPLIES F1 2015 2 12S. DISASSEMBLY F2 2015 2 12S. DISASSEMBLY DIN-NX F4 2015 2 12S. DISASSEMBLY F5 2015 2 12S. INSPECTION AND CLEANING F6 2015 2 12S. FIRST STAGE SERVICE KIT F7 2015 2 12S. REASSEMBLY F8 2015 2 12S. REASSEMBLY DIN-NX F11 2015 2 12S. REASSEMBLY F13 2015 2 12S. ADJUSTMENT F14 2015 2 12S. TROUBLESHOOTING F16 2015 2 12S. DRAWING E 118 F17 2015 2 12S. CHART 41 F18 2015 2 OCTOPUS MV Pag Last Note Vol revision MV. REQUIRED TOOLS AND SUPPLIES S1 2017 NEW 2 MV. DISASSEMBLY S2 2017 NEW 2 MV. INSPECTION AND CLEANING S4 2017 NEW 2 MV. SECOND STAGE SERVICE KIT S5 2017 NEW 2 MV. REASSEMBLY S6 2017 NEW 2 MV. ADJUSTMENT S10 2017 NEW 2 MV. FINAL ADJUSTMENT S11 2017 NEW 2 MV. TROUBLESHOOTING S12 2017 NEW 2 MV. DRAWING E 34 S14 2017 NEW 2 MV. CHART 124 S15 2017 NEW 2 Jackets JACKETS ERGO INFLATOR 2017 NEW 2 15X FIRST STAGE ITM 37 ITM 37 2015 2 ITM 40 ITM 40 2015 2 BTM 25_R1 BTM 25_R1 2015 2 15X. REQUIRED TOOLS AND SUPPLIES F1 2015 2 15X. DISASSEMBLY F2 2015 2 15X. DISASSEMBLY INT F5 2015 2 15X. DISASSEMBLY DIN - NX F5 2015 2 15X. INSPECTION AND CLEANING F6 2015 2 15X. FIRST STAGE SERVICE KIT F7 2015 2 15X. REASSEMBLY F8 2015 2 15X. REASSEMBLY INT F11 2015 2 15X. REASSEMBLY DIN - NX F12 2015 2 15X. ADJUSTMENT F13 2015 2 15X. TROUBLESHOOTING F15 2015 2 15X. DRAWING E119 F16 2015 2 15X. CHART 42 F17 2015 2 2S FIRST STAGE 2S. REQUIRED TOOLS AND SUPPLIES F1 2017 NEW 2 2S. DISASSEMBLY F2 2017 NEW 2 2S. DISASSEMBLY DIN F4 2017 NEW 2 2S. INSPECTION AND CLEANING F5 2017 NEW 2 2S. FIRST STAGE SERVICE KIT F6 2017 NEW 2 2S. REASSEMBLY F7 2017 NEW 2 2S. REASSEMBLY DIN F10 2017 NEW 2 2S. ADJUSTMENT F11 2017 NEW 2 2S. TROUBLESHOOTING F13 2017 NEW 2 2S. DRAWING E 976 F14 2017 NEW 2 2S. CHART 38 F15 2017 NEW 2 2S. DRAWING E 976 F16 2017 NEW 2 2S. CHART 44 F17 2017 NEW 2 SECOND STAGES ROVER SECOND STAGE ITM 23 ITM 23 2017 NEW 2 ITM 33 ITM 33 2017 NEW 2 ROVER. REQUIRED TOOLS AND SUPPLIES S1 2017 NEW 2 ROVER. DISASSEMBLY S2 2017 NEW 2 ROVER. INSPECTION AND CLEANING S4 2017 NEW 2 ROVER. SECOND STAGE SERVICE KIT S5 2017 NEW 2 ROVER. REASSEMBLY S6 2017 NEW 2 ROVER. ADJUSTMENT S12 2017 NEW 2 ROVER. REASSEMBLY S13 2017 NEW 2 ROVER. TROUBLESHOOTING S14 2017 NEW 2 ROVER. DRAWING E 38 S16 2017 NEW 2 ROVER. CHART 128 S17 2017 NEW 2

2017 - revised 2017 Introduction I1 INTRODUCTION Mares S.p.A., based in Salita Bonsen, Rapallo, Italy, manufactures and distributes a complete line of diving equipment. Mares brand is synonymous of excellent quality, which all passionate scuba divers recognize in this name. MARES SERVICE MANUAL This Manual is intended to be used by qualified Mares Service Technicians as a reference guide when servicing and repairing Mares products. Use of this Manual should not be considered a substitute for proper training and qualification as a Mares Service Technician. Drawings and Charts are subject to change. When performing service procedures and ordering parts, please be sure to reference the most recent versions. WARNING POSSESSION OF THIS MANUAL DOES NOT, IN ANY WAY, CONSTITUTE OR IMPLY AUTHORIZATION BY MARES TO SERVICE OR REPAIR MARES PRODUCTS. PERFORMING SERVICE AND/OR REPAIR PROCEDURES ON MARES PRODUCTS BY ANYONE OTHER THAN QUALIFIED MARES SERVICE TECHNICIANS AT AUTHORIZED MARES DEALERS AND SERVICE CENTERS VOIDS ALL MARES WARRANTIES AND THE TECHNICIAN OR DEALER ASSUMES SOLE RESPONSIBILITY AND LIABILITY FOR ANY DAMAGE OR INJURIES WHICH MAY RESULT FROM SUCH SERVICE AND/OR REPAIR PROCEDURES. CAUTION IF ANY INSTRUCTIONS OR PROCEDURES CONTAINED IN THIS SERVICE MANUAL ARE UNCLEAR TO YOU, OR IF YOU HAVE ANY QUESTIONS, PLEASE CONTACT THE LOCAL MARES SUBSIDIARY OR DISTRIBUTOR THAT SERVICES YOUR AREA BEFORE PERFORMING ANY SERVICE AND/OR REPAIR. Mares strongly recommends to carefully read all sections described in this manual before performing any repair/service procedure. 2016 MARES S.p.A. Salita Bosen, 4-16035 Rapallo (Ge) - ITALY ALL RIGHTS RESERVED. This Manual contains information protected under the International and Federal Copyright Laws and Treaties. Any unauthorized reprint or use of this material is prohibited. No part of this Manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by information storage and retrieval system without express written permission from Mares S.p.A.

2017 - revised 2017 Introduction I2 INTRODUCTION This manual consists of two Volumes: Volume 1 includes products till collection 2014/2015. It won t be modified anymore. Volume 2 includes products from collection 2015/2016 on. Any update will be issued to all qualified Mares Service Technicians. Every single manual is organized as follow: Cover showing the name of the product and a picture. All Technical Information and Technical Bulletin related to the product. Disassembly procedures. Inspection and Cleaning Procedures. Product service Kit. Reassembly Procedures. Adjustment Procedures. Troubleshooting Section. Drawing and Chart. SYMBOLS Any information, notices and precautions concerning operations which may compromise the efficiency of the product, prove dangerous or even fatal for the technician, the owner of the product or other persons, are highlighted by the following symbols: DANGER INDICATES AN IMMINENTLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, WILL RESULT IN DEATH OR SERIOUS INJURY. WARNING INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, COULD RESULT IN DEATH OR SERIOUS INJURY. CAUTION INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, MAY RESULT IN MINOR OR MODERATE INJURY. IT MAY ALSO BE USED TO ALERT AGAINST UNSAFE PRACTICES. Indicates suggestions and recommendations on how to correctly perform certain operations described in the manual.

2017 - revised 2017 Introduction I3 TECHNICAL BULLETINS TECHNICAL INFORMATION S Each product s service manual includes the ITM and BTM Technical Bulletins that are related to that particular product. ITM and BTM Bulletins will also be periodically issued by Mares as deemed necessary to inform Mares Service Technicians about changes and/or modification to service procedures and parts. Each product s Service Manual will be updated annually. At that time, all previous year s ITM and BTM Bulletins will be added to the product s Service Manual so that all Technical Bulletins related to that product are available for easy reference. Please check with the local Mares Subsidiary or Distributor that services your area for details on annual distribution of updated service manuals. INDEX AND UPDATE The column Last Revision shows the latest year in which a section, document, or page has been modified. The modified section, document, or page replaces the existing one, following the order specified in the index. The column Note is dedicated to new section, document, or page, that need to be added to the Service Manual. The new section, document, or page, marked by the word NEW, must be added to the Service Manual following the order specified in the index. The column Volume show which volume the product belong to.

12S FIRST STAGE 12S FIRST STAGE

2015 - revised 2015 Technical Bulletin BTM 15 BTM 15 FIRST STAGE MR12 NITROX CONNECTOR (EN 144-3) MAINTENANCE INSTRUCTION DEC. 21, 2005 FOR COMPONENTS PLEASE REFER TO 2006 SPARE PART LIST - Table 29 drawing 106. FOR FINAL ADJUSTMENT PLEASE CHECK THE MAINTENANCE MANUAL - EN 13949 NITROX SECTION. STARTING FROM 2006, MARES MANUFACTURES NITROX REGULATORS TESTED AND APPROVED ACCORDING TO EN 13949:2003 NORM. THE NITROX First Stage ASSEMBLY THE NEW NITROX 200 BAR TYPE CONNECTION IN ACCORDANCE TO THE EN 144-3 NORM. THE NEW NITROX Connector MUST BE ASSEMBLED ONLY ON VALVES WITH FEMALE CONNECTION M 26X2 IN COMPLIANCE WITH THE EN 144-3 NORM. WARNING! THESE PROCEDURES APPLY ONLY ON MARES NITROX REGULATORS CERTIFIED ACCORDING TO EN 13949:2003 NORM. THEY SHOULD NOT BE USED AS STANDARD PROCEDURE TO MODIFY OTHER REGULATORS. THE MAINTENANCE OPERATION ON THE NEW NITROX CONNECTOR MUST BE PERFORMED BY ONLY AUTHORIZED QUALIFIED PERSONNEL AT A TECHNICAL ASSISTANCE CENTER AND/OR BY AN AUTHORIZED MARES DISTRIBUTOR. FOR ADJUSTMENT AND INSPECTIONS PLEASE CHECK THE PROCEDURES DESCRIBED IN THE MAINTENANCE MANUAL -NITROX SECTION EN 13949:2003. SHOULD THE UPDATED MANUALS CONTAINING THE SECTIONS INDICATED BE ABSENT, OR IF THE INSTRUCTIONS ARE UNCLEAR OR NOT ENTIRELY UNDERSTANDABLE, PLEASE CONTACT MARES BEFORE PERFORMING ANY MAINTENANCE, ADJUSTMENT OR CHECK. - 1 HEX WRENCH 6mm (B-8 Cod. 46106208) Tools - FIRST STAGE TOOL (B-5 Cod. 46106205) - 1 WRENCH 32mm (B-16 Cod. 46106216) WARNING! MARES RECOMMENDS TO PAY MAXIMUM ATTENTION DURING THE ASSEMBLING, MAINTENANCE AND/OR ADJUSTMENT OPERATIONS LISTED BELOW.

2015 - revised 2015 Technical Bulletin BTM 15 BTM 15 FIRST STAGE MR12 NITROX Connector (EN 144-3) MAINTENANCE INSTRUCTION DEC. 21, 2005 DISASSEMBLY 1. SCREW THE TOOL (B-5) IN A 3/8 LP PORT (Fig. 1). 2. WITH THE 6MM HEX WRENCH (B-8), UNSCREW THE CONNECTOR FRONT (51) AND REMOVE O-RINGS (50) AND (198). 3. REMOVE THE CONNECTOR WHEEL (49). 4. WITH THE WRENCH (B-16), USCREW THE CONNECTOR BASE (48) AND REMOVE THE O-RING (23). RIASSEMBLY 5. PLACE THE O-RING (23) ON THE CONNECTOR BASE (48). 1 TO AVOID ACCIDENTAL LOOSENING OF THE NITROX CONNECTOR BASE (48) AND THE CONNECTOR FRONT (51), POUR, AWAY FROM THE O-RING, ONE OR TWO DROPS OF SEALING COMPOUND (LOCTITE TYPE 242 E) ON THE THREAD. DO NOT POUR LOCTITE ON THE O-RINGS. 6. TIGHTENING WITH THE 32MM WRENCH (B-16), SCREW THE NITROX CONNECTOR BASE (48) ON THE FIRST STAGE BODY. IF A TORQUE WRENCH IS USED, SET IT ON 17-20 N.m. 7. PLACE CORRECTLY THE WHEEL (49) ON THE CONNECTOR BASE (48). 8. PLACE THE O-RINGS (50) AND (198) ON THE CONNECTOR SEAT (51). 9. USING THE 6MM HEX WRENCH TIGHTEN THE CONNECTOR SEAT (51) ON THE FIRST STAGE.

2015 - revised 2015 Technical Bulletin BTM 15 Drawing No.E 106 MR12 NITROX CONNECTOR Drawing updated: 05/25/05 Table No. 29 MR12 NITROX CONNECTOR Drawing reference No.: E 106 Table updated on: 05/25/2005 CHART NO: 29 MR 12 NITROX CONNECTOR UPDATED: 05/25/2005 Ref. No. Part n. DESCRIPTION Ref. No. Part n. DESCRIPTION 23 46110406 O-ring 115 Viton 198 46200655 OR 3056 Viton 48 46200657 Connector - base Nitrox 200 49 46200654 Wheel 200 Bar M26X2 50 46110409 O-ring 2018 Viton 51 46200656 Connector - front Nitrox ASSEMBLY 62 46200658 Protection cap 2K5 (yellow) F 46200664 NITROX Connector 200 BAR

2015 - revised 2015 Technical Bulletin BTM 17 BTM 17 NEW HP POPPET SEAT FOR MR FIRST STAGES (CODE: 46186216) JAN. 30, 2008 THE TECHNICAL ASSISTANCE DEPARTMENT OF MARES S.P.A. ANNOUNCES A MODIFICATION TO THE PROFILE AND MATERIAL OF THE HP POPPET SEAT USED IN ALL OF MARES MR FIRST STAGES. THE CODE FOR THE NEW HP POPPET SEAT HAS NOT CHANGED AND CAN ONLY BE IDENTIFIED BY THE DESCRIPTION BELOW. THE NEW HP POPPET SEAT WAS DESIGNED AND TESTED TO GUARANTEE A GREATER RESISTANCE TO WEAR AND TEAR. THE NEW HP POPPET SEAT SHOULD ONLY BE USED WITH THE TRI-MATERIAL POPPET, (CODE: 46200652) THE NEW HP POPPET SEAT CAN BE EASILY IDENTIFIED BY THE RADIAL THROAT DESIGN UNDER THE SEAT OF THE OR- RING (AS SHOWN IN PICTURE 1 BELOW). - NEW HP POPPET SEAT - WARNING! THE ASSEMBLING OPERATION OF THE NEW DIN CONNECTOR MUST BE PERFORMED BY ONLY QUALIFIED PERSONNEL AT A TECHNICAL ASSISTANCE CENTRE AND/OR BY AN AUTHORIZED MARES DISTRIBUTOR. FOR THE ASSEMBLY PLEASE FOLLOW THE PROCEDURES DESCRIBED IN THIS TECHNICAL BULLETIN. FOR POSSIBLE ADJUSTMENT PROCEDURE, CHECKS OR COMPONENTS REFERENCE NUMBERS PLEASE CONSULT THE PROCEDURES AND THE DRAWINGS DESCRIBED IN THE MAINTENANCE MANUAL. SHOULD THE UPDATED MANUALS CONTAINING THE SECTIONS INDICATED BE ABSENT, OR IF THE INSTRUCTIONS ARE UNCLEAR OR NOT ENTIRELY UNDERSTANDABLE, PLEASE CONTACT MARES BEFORE PERFORMING ANY MAINTENANCE, ADJUSTMENT OR CHECK. WARNING! MARES RECOMMENDS, WHEN ASSEMBLING THE DIN CONNECTOR, TO PAY PARTICULAR ATTENTION TO THE MAINTENANCE AND/OR ADJUSTMENT OPERATIONS LISTED HERE BELOW. DISASSEMBLY: ASSEMBLE THE DIN CONNECTOR AFTER HAVING DISASSEMBLED, FROM THE FIRST STAGE, THE YOKE RETAINING NUT (7), THE YOKE (3) AND THE YOKE KNOB (25), FOLLOWING THE INSTRUCTIONS IN THE MANUAL RELATED TO YOUR FIRST STAGE.

2015 - revised 2015 Technical Information ITM 19 ITM 19 SPECIAL TOOLS (# 46201041 - # 46201042) SEP. 07, 2009 IMPORTANT INFORMATION FOR COMPONENTS PLEASE REFER TO 2006 SPARE PART LIST - Table 29 drawing 106 FOR FINAL ADJUSTMENT PLEASE CHECK THE MAINTENANCE MANUAL - EN 13949 NITROX SECTION 12S HP SEAT CONNECTOR DISASSEMBLY TOOL (B-41) INSERT THE TOOL (B-41) IN A LOW PRESSURE POR T AND USE IT TO PRY OUT THE HP SEAT CONNECTOR. Fig. 2 Fig. 3 Fig. 4 Fig. 5

2015 - revised 2015 Technical Information ITM 19 ITM 19 SPECIAL TOOLS (# 46201041 - # 46201042) SEP. 07, 2009 HP SEAT CONNECTOR DISASSEMBLY TOOL (B-42) INSERT THE TOOL (B-42) IN THE CENTRAL POR T ON THE DIAPHRAGM SIDE UNTIL YOU FEEL IT TOUCH THE SEA T CONNECTOR (FIG. 3). THEN PRESS (FIG. 3) ON THE SEAT CONNECTOR UNTIL IT COMES OUT COMPLETELY (FIG. 4). VALVE PROCEDURE FOR THE MR-V 12/16/22/32/HUB SERIES. Fig. 2 Fig. 3 Fig. 4 Fig. 5

2015 - revised 2015 Technical Information ITM 19 ITM 19 SPECIAL TOOLS (# 46201041 - # 46201042) SEP. 07, 2009 BELOW IS THE VALVE SEQUENCE FOR MR42 INSERT THE TOOL (B-42) IN THE CENTRAL PORT ON THE DIAPHRAGM SIDE UNTIL YOU FEEL IT TOUCH THE SEAT CONNECTOR (FIG. 3). THEN PRESS ON IT (FIG. 4) UNTIL YOU COMPLETEL Y REMOVE THE SEAT CONNECTOR. Fig. 2 Fig. 3 Fig. 4 Fig. 5

2015 - revised 2015 Technical Information ITM 24 ITM 24 PARBAK BACKUP RING AUG. 03, 2011 TECHNICAL ASSISTANCE HQ ANNOUNCES THAT FOLLOWING NUMEROUS TESTS, IT HAS ALTERED THE MATERIAL AND SHAPE OF THE BACKUP RING INITIALLY USED ON THE NAVY 22 REGULATORS. THE NEW PARBAK BACKUP RING ENSURES EXCELLENT PERFORMANCE FOR FIRST STAGES, ESPECIALLY FOR DIVES IN EXTREMELY COLD WATERS (<= 0 C). AS SHOWN IN FIG. 1, THE NEW PARBAK BACKUP RING IS EASILY DISTINGUISHABLE FROM THE PREVIOUS TEFLON VERSION, THANKS TO THE BLACK COLOR OF THE NEW MATERIAL USED. BOTH BACKUP RINGS WILL SOON BE INCLUDED IN ALL FIRST STAGE MAINTENANCE KITS, CURRENTLY IN USE, WHICH WILL BE IDENTIFIED BY V.11 IN THEIR DESCRIPTION. -BACKUP RINGS CURRENTLY IN USE - -HP CHAMBER BACKUP RING, PARBAK- FIG. 1 FIG. 2 46185038 461105068 SIDE - A SIDE - B 5 WARNING! THE BACKUP RING IS MADE OF IS PART OF THE "NITRILE RUBBER" (NBR) FAMILY EUROPEAN COUNTRIES: USE OF NITROX MIXES GREATER THAN 21% O 2 IS NOT RECOMMENDED. WHEN PERFORMING MAINTENANCE AND/OR REPAIRS ON NITROX REGULATORS, THE USE OF TEFLON BACKUP RINGS IS RECOMMENDED (# 46185038). NOT EUROPEAN COUNTRIES: USE OF NITROX MIXES GREATER THAN 40% O 2 IS NOT RECOMMENDED.

2015 - revised 2015 Technical Information ITM 24 ITM 24 PARBAK BACKUP RING AUG. 03, 2011 ASSEMBLY INSTRUCTIONS MAKE SURE THAT ONCE INSERTED INTO THE BALANCING CHAMBER (4) THE BACKUP RING (5) HAS SIDE A (FIG. 2) FACING THE O-RING (6). THE REGULATORS ON WHICH THE BACKUP RING (# 46110506) WILL BE INSTALLED CAN BE IDENTIFIED BY A SERIAL NUMBER, AS SHOWN IN THE TABLE BELOW: PRODUCT CODE DESCRIPTION SERIAL NUMBER 416134 ABYSS 22 DIN EA 29556 416134 ABYSS 22 INT EA 29180 416182 PRESTIGE 12S DIN SM 18279 416216 First Stage MR22 DIN SMU UM 11462 416158 ABYSS 22 NAVY DIN NV 10196 416222 ABYSS 22 INT x SET 2 STA 11291 416209 First stage MR 12S DIN SS 13965 416155 PRESTIGE 22 DPD DIN GM 12500 416223 PRESTIGE 12S INT x SET D STE 10419 416222 ABYSS 12S INT x SET 2 STB 11291 416182 PRESTIGE 12S INT SM 18921 WARNING! MAINTENANCE OPERATIONS MUST BE PERFORMED BY QUALIFIED PERSONNEL AT A MARES TECHNICAL ASSISTANCE CENTER AND/OR AUTHORIZED MARES DISTRIBUTOR. IN ORDER TO DISASSEMBLE AND REASSEMBLE THE SEAT FROM THE FIRST STAGE, IT IS NECESSARY TO CONSULT THE PROCEDURES DESCRIBED IN THE CORRESPONDING SECTION OF THE MAINTENANCE MANUAL. IN THE EVENT THAT THE UPDATED MANUAL CONTAINING THE SECTIONS INDICATED IS UNAVAILABLE, OR IF THE INSTRUCTIONS ARE UNCLEAR OR NOT ENTIRELY UNDERSTANDABLE, PLEASE CONTACT MARES BEFORE PERFORMING ANY MAINTENANCE, ADJUSTMENT, OR CHECK.

2015 - revised 2015 Technical Information ITM 25 ITM 25 MR 12 FIRST STAGE MODIFICATION NOV. 15, 2011 TECHNICAL ASSISTANCE HQ WISHES TO NOTIFY ALL TECHNICIANS WORKING IN MARES LAB SERVICE CENTERS THAT, BEGINNING WITH THE 2012 COLLECTION, A NEW VERSION OF THE MR 12S FIRST STAGE WILL BE AVAILABLE. WHILE PERFORMANCE AND RELIABILITY REMAIN UNCHANGED, THE NEW VERSION OF THE MR12S FIRST STAGE WILL BE EASIER TO MAINTAIN AND WILL DECREASE REPAIR TIME, ESPECIALLY IN THE INT VERSION. THIS TECHNICAL SHEET PROVIDES ALL THE INSTRUCTIONS AND PROCEDURES NEEDED TO EASILY IDENTIFY THE FIRST STAGE VERSIONS SO THAT ORDERS CAN BE MADE CORRECTLY FOR INDIVIDUAL COMPONENTS AND THE VARIOUS KITS (MAINTENANCE AND DIN). THE NEW FIRST STAGE WILL BE ASSEMBLED ON ALL ROVER 12S AND INSTINCT 12S REGULATORS. ON ALL PRESTIGE 12S THERE WILL BE A RUNNING CHANGE. THE TWO VERSIONS WILL BE EASILY IDENTIFIABLE, BECAUSE THE PREVIOUS VERSION (2008) USES A DIFFERENT DIAPHRAGM RETAINING NUT, WHICH CREATES A GROOVE WITH THE BODY OF THE FIRST STAGE, AS SHOWN BY THE ARROW (PHOTO 1 AND PHOTO 5). FOR MORE INFORMATION ABOUT REFERENCES AND/OR CODES, PLEASE CONSULT THE APPROPRIATE EXPLODED DIAGRAMS FOUND ON THE 2011 SPARE PARTS LIST (VERSION 2011: DIAGRAM #40 - TABLE E 117; VERS 2008: DIAGRAM #35 - TABLE E 112). WARNING! MAINTENANCE OPERATIONS MUST BE PERFORMED BY AUTHORIZED PERSONNEL AT A MARES LAB TECHNICAL ASSISTANCE CENTER AND/OR AUTHORIZED MARES DISTRIBUTOR. FOR DISASSEMBLY AND REASSEMBLY PROCEDURES, CONSULT THE PROCEDURES DESCRIBED IN THE CORRESPONDING SECTION OF THE MAINTENANCE MANUAL. IF THE UPDATED MANUAL CONTAINING THESE SECTIONS IS NOT AVAILABLE AND/OR IF THE INSTRUCTIONS ARE NOT CLEAR OR FULLY UNDERSTANDABLE, PLEASE CONTACT MARES S.p.A. TECHNICAL SUPPORT BEFORE PERFORMING ANY MAINTENANCE, ADJUSTMENT, OR INSPECTION OPERATIONS.

2015 - revised 2015 Technical Information ITM 25 ITM 25 MR 12 FIRST STAGE MODIFICATION NOV. 15, 2011 INTERNATIONAL VERSIONS 2008 VERSION PARTS AND VARIOUS COMPONENTS CODES KIT CODES HP CHAMBER NUT 46200940 First Stage BODY 46200944 DIAPHRAGM RETAINING NUT 46200938 DIN 300 CONNECTOR KIT #416807 CWD DRY KIT #416856 SERVICE KIT #46200963 PHOTO 1 PHOTO 2 2011 VERSION PARTS AND VARIOUS COMPONENTS CODES KIT CODES FIRST STAGE BODY 46201146 DIN 300 CONNECTOR KIT #416804 PHOTO 3 PHOTO 4 DIAPHRAGM RETAINING NUT 46201137 DIN 200 CONNECTOR KIT #416808 CWD DRY KIT #416855 CWD OIL KIT #416851 SERVICE KIT #46201184

2015 - revised 2015 Technical Information ITM 25 ITM 25 MR 12 FIRST STAGE MODIFICATION NOV. 15, 2011 INTERNATIONAL VERSIONS 2008 VERSION PARTS AND VARIOUS COMPONENTS CODES KIT CODES FIRST STAGE BODY 46200944 SERVICE KIT #46200964 PHOTO 5 PHOTO 6 DIAPHRAGM RETAINING NUT 46200938 2011 VERSION PARTS AND VARIOUS COMPONENTS CODES NECESSARY KIT CODES FIRST STAGE BODY 46201146 SERVICE KIT #46200964 DIAPHRAGM RETAINING NUT 46201137 PHOTO 7 PHOTO 8

2015 - revised 2015 Technical Information ITM 29 ITM 29 DIAPHRAGM FIRST STAGE (#46201111 & #46185022) MAY. 18, 2013 MARES S.p.A. TECHNICAL SUPPORT WISHES TO UPDATE MARES LAB CENTERS AND TECHNICIANS ON THE USE OF FIRST STAGE 35mm/1.37 inch DIAMETER DIAPHRAGMS. THE NEW 46201111 VERSION (PHOTO 1) CAN BE IDENTIFIED BY ITS ROUGH APPEARANCE. IT WAS DESIGNED FOR USE IN PARTICULARLY COLD ENVIRONMENTS, WITH EXTERNAL TEMPERATURES DOWN TO -20 C / -4F. THIS DIAPHRAGM WAS MOUNTED STANDARD ON THE MR 22 AND NAVY FIRST STAGE WITH WHICH IT IS CERTIFIED IN ACCORDANCE WITH THE CE MARK. INITIALLY THE 46201111 DIAPHRAGM WAS ALSO USED ON THE MR12 VERSIONS. HOWEVER, A FEW CASES OF VIBRATION IN THE First Stage WERE REPORTED WHEN PRESSURE IN THE TANK THAT FEEDS THE First Stage DROPPED TO BETWEEN 60-50 bar, 860-725 psi. FOR THIS REASON, THE ENTIRE MR12 SERIES HAS REVERTED TO THE TRADITIONAL 46185022 DIAPHRAGM (PHOTO 2), AS CONFIRMED BY THE 2013 HI TECH PARTS LIST. BELOW ARE THE STARTING SERIAL NUMBERS FOR THE MR12S WHICH HAVE THE DIAPHRAGM 46185022 FITTED AGAIN: CODE DESCRIPTION SERIAL NUMBER 416164 INSTINCT 12 S INT IS 13850 416164 INSTINCT 12 S DIN IS 13859 416166 ROVER 12 S DIN OV 13286 416182 PRESTIGE 12 S DIN SM 21764 416223 SET PRESTIGE 12 S DIN- INT STD 10961 416167 MV 12S USA - INT VA 11001 416209 FIRST STAGE 12 S SMU DIN SS 16221 #46201111 MR22-NAVY #46185022 MR12 1 2 WARNING! MAINTENANCE PROCEDURES MUST BE PERFORMED BY QUALIFIED PERSONNEL AT A MARESLAB TECHNICAL ASSISTANCE CENTER AND/OR AUTHORIZED MARES DISTRIBUTOR. IN ORDER TO DISASSEMBLE AND REASSEMBLE THE SEAT FROM THE First Stage, IT IS NECESSARY TO CONSULT THE PROCEDURES DESCRIBED IN THE RELATED SECTION OF THE MARES MAINTENANCE MANUAL. IF THE UPDATED MANUAL CONTAINING THE REQUIRED SECTIONS IS NOT AVAILABLE AND/OR IF THE INSTRUCTIONS ARE NOT ENTIRELY CLEAR OR NOT FULLY COMPREHENSIBLE, PLEASE CONTACT THE MARES S.p.A. TECHNICAL SUPPORT SERVICE BEFORE CONDUCTING ANY MAINTENANCE, ADJUSTMENT, OR CONTROL OPERATIONS.

2015 - revised 2015 Technical Information ITM 30 ITM 30 12S FIRST STAGE 2011 ADJUSTING NUT AND RETAINING NUT JUN. 10, 2013 MARES S.p.A. TECHNICAL SUPPORT WISHES TO INFORM ALL MARES LAB PARTNERS OF A MODIFICATION MADE TO THE 12S 2011 VERSION FIRST STAGE (SEE ITM 25 TO IDENTIFY THE VERSION OF THE FIRST STAGE). IT NOW HAS A NEW RETAINING NUT (REF. 17) AND ADJUSTING NUT (REF. 196), AS SHOWN IN THE IMAGE BELOW. THE THREAD PITCH WILL CHANGE FROM M24x1.5 TO M24x1. THIS CHANGE ALLOWS FOR GREATER PRECISION WHEN ADJUSTING THE INTERMEDIATE PRESSURE (IP) AND ENSURES BETTER ALIGNMENT OF THE SPRING ON THE DIAPHRAGM. THE RETAINING NUT CAN BE RECOGNIZED BY ITS DIFFERENT PROFILE (SEE PHOTO BELOW). RAISED PROFILE PREVIOUS NEW 2013 THE NEW COMPONENTS WILL BE ASSEMBLED ON ALL 12S FIRST STAGES, BEGINNING WITH THE SERIAL NUMBERS INDICATED IN THE TABLE BELOW: CODE DESCRIPTION SERIAL NUMBER 416164 Instinct 12S din IS 15370 416166 Rover 12S OV 15993 416182 Prestige 12s SM 22750 416164 Instinct 12S int IS 15550 416167 MV 12S smu UA 12053 416169 Instinct 12S D ID 10193 416209 First Stage 12S smu SS 18460 416223 Set Prestige 12S D STD 11321 416226 Prestige 12S smu JP UP 10253 416156 Prestige 12S She Dives DS 13837 WITH REGARD TO SPARE PARTS, RETAINING NUT #46201137 AND ADJUSTING NUT #46184511 WILL BE AVAILABLE WHILE SUPPLIES LAST. THEY WILL BOTH BE REPLACED WITH THE M24X1 DIAPHRAGM NUT KIT (CODE: 46201268). WARNING! MAINTENANCE PROCEDURES MUST BE PERFORMED BY QUALIFIED PERSONNEL AT A MARESLAB TECHNICAL ASSISTANCE CENTER AND/OR AUTHORIZED MARES DISTRIBUTOR. IN ORDER TO DISASSEMBLE AND REASSEMBLE THE SEAT FROM THE FIRST STAGE, IT IS NECESSARY TO CONSULT THE PROCEDURES DESCRIBED IN THE RELATED SECTION OF THE MARES MAINTENANCE MANUAL. IFTHE UPDATED MANUAL, CONTAINING THE INDICATED SECTIONS IS UNAVAILABLE, OR IF THE INSTRUCTIONS ARE UNCLEAR OR NOT ENTIRELY UNDERSTANDABLE, PLEASE CONTACT MARES BEFORE PERFORMING ANY MAINTENANCE, ADJUSTMENT, OR CHECK.

2015 - revised 2015 Technical Information ITM 37 ITM 37 PARBAK BACKUP RING FEB. 24, 2015 WITH REFERENCE TO PREVIOUS ITM 24_R1, MARES TECHNICAL SERVICE IS PLEASED TO INFORM ALL MARES LAB PARTNERS THAT AFTER HAVING PERFORMED SEVERAL TESTS, PART NUMBER 46110506 PARBAK BACKUP RING WILL BE ASSEMBLED AS RUNNING CHANGE IN ALL NX REGULATORS AND VITON FIRST STAGE SERVICE KIT, STARTING FROM SEASON 2015. THE TESTS PERFORMED SHOW THAT PARBAK BACKUP RING PROVIDES EXCELLENT PERFORMANCE EVEN USED WITH NX FIRST STAGES, ESPECIALLY DIVING IN EXTREMELY COLD WATER (<= 0 C). AS SHOWN IN PIC. 1, THE PARBAK BACKUP RING CAN BE EASILY IDENTIFIED, THANKS TO THE BLACK COLOR OF THE NEW MATERIAL. -BACKUP RINGS CURRENTLY IN USE - -HP CHAMBER BACKUP RING, PARBAK- FIG. 1 FIG. 2 46185038 461105068 SIDE - A SIDE - B 5 ASSEMBLY INSTRUCTIONS MAKE SURE THAT ONCE INSERTED INTO THE BALANCING CHAMBER (4) THE BACKUP RING (5) HAS SIDE A (FIG. 2) FACING THE O-RING (6). WARNING! MAINTENANCE PROCEDURES MUST BE PERFORMED BY QUALIFIED PERSONNEL AT A MARESLAB TECHNICAL ASSISTANCE CENTER AND/OR AUTHORIZED MARES DISTRIBUTOR. IN ORDER TO DISASSEMBLE AND REASSEMBLE THE SEAT FROM THE FIRST STAGE, IT IS NECESSARY TO CONSULT THE PROCEDURES DESCRIBED IN THE RELATED SECTION OF THE MARES MAINTENANCE MANUAL. IN THE EVENT THAT THE UPDATED MANUAL, CONTAINING THE INDICATED SECTIONS IS UNAVAILABLE, OR IF THE INSTRUCTIONS ARE UNCLEAR OR NOT ENTIRELY UNDERSTANDABLE, PLEASE CONTACT MARES BEFORE PERFORMING ANY MAINTENANCE, ADJUSTMENT, OR CHECK.

2015 - revised 2015 Technical Information ITM 40 ITM 40 ACT (Advanced Coating Technology) FIRST STAGE POPPET INFO OCT. 08, 2015 MARES TECHNICAL DEPARTMENT IS PLEASED TO INFORM YOU THE NEW ACT POPPET (# 46201361) IS CURRENTLY ASSEMBLED ON ALL INLINE DIAPHRAGM FIRST STAGES WITH THE EXCEPTION OF THE ABYSS NAVY II. THERE WILL BE NO CHANGES MADE TO IT AT THIS TIME. (SEE BTM 24) THE REGULATOR MATERIAL NUMBERS WILL STAY THE SAME. THE REGULATORS ASSEMBLED WITH THE NEW ACT POPPET, WILL BE EASILY IDENTIFIED BY AN X PRINTED ON THE CARDBOARD BOX AND ALSO PLACED ON THE FIRST STAGE PLASTIC PROTECTION COVER. EXAMPLE: ABYSS 22 = ABYSS 22X THE MAIN FEATURES OF THE ACT POPPET ARE: MADE OF TWO MATERIALS: CHROME PLATED BRASS LESS FRICTION OF THE STEM ACT COATING PROCESS EFFECTIVE SEPTEMBER 2015, ALL 1ST STAGE SERVICE KITS INCLUDE THE ACT POPPET, EXCEPT FOR THE ABYSS 22 NAVY II SERVICE KITS (INT: # 46186152 / DIN: # 46200606) DUE TO US NAVY PROTOCOLS. FIRST STAGE 52X-22X-15X INT/DIN: # 46201355 FIRST STAGE 52X-22X-15X INT/DIN VITON: # 46201358 FIRST STAGE 12S INT/DIN: # 46201370 FIRST STAGE 12S INT/DIN VITON: # 46201371 : SOME SERVICE KITS ARE USED FOR MULTIPLE FIRST STAGE MODELS. (I.E. KIT #46200906 (EXCLUDES POPPET) IS USED FOR THE 22, MR16, AND MR32). THESE SERVICE KITS WILL CONTINUE UNTIL THE CURRENT STOCK IS EXHAUSTED. AT THAT TIME, IT WILL BE REPLACED BY SERVICE KITS THAT WILL INCLUDE THE ACT POPPET. CHECK WITH MARES HQ FOR DETAILS). : THE CURRENT MR UPGRADE KIT (#46200705) WILL BE DISCONTINUED AND REPLACED BY THE ACT UPGRADE KIT (#46201386). VALVE SEAT CODE# 46201139 (RO.15) IS NO LONGER AVAILABLE AND HAS BEEN REPLACED WITH THE VALVE SEAT CODE# 46186216 (RO.05) IN THE SPARE PARTS CATALOG. MARES TECHNICAL DEPARTMENT SUGGESTS THE USE OF THE NEW VALVE SEAT CODE# 46186216 IN ORDER TO PRODUCE OPTIMUM PERFORMANCE OF THE ACT FIRST STAGE POPPET, PARTICULARLY IN DIN (300 BAR) FIRST STAGES. IMPORTANT ALL SERVICE AND REPAIR PROCEDURES ON MARES PRODUCTS SHOULD BE PERFORMED BY QUALIFIED MARES SERVICE TECHNICIANS AT AUTHORIZED MARES SERVICE CENTER. SERVICE TECHNICIANS SHOULD HAVE THE LATEST VERSION OF THE MARES SERVICE MANUAL AND SPARE PART CATALOG READILY AVAILABLE WHILE PERFORMING SERVICE PROCEDURES AND CLOSELY FOLLOW THE RECOMMENDED PROCEDURES AND GUIDELINE OUTLINED IN THESE MATERIALS.

2015 - revised 2015 Technical Bulletin BTM25_R1 BTM 25_R1 REGULATOR SERVICE GUIDELINE AND SERVICE INTERVALS OCT. 27, 2015 Mares has revised the regulator service guidelines and service intervals. The new guidelines and intervals apply to all in-line Mares diaphragm regulators as of September 1st 2015, except for the Abyss 22 NAVY II regulator and octopus as noted below. MARES REGULATOR SERVICE GUIDELINES AND SERVICE INTERVALS PERFORM AN ANNUAL INSPECTION AND/OR SERVICE EVERY YEAR OR 100 DIVES The Mares annual regulator inspection and/or service is performed by following the procedures and guidelines outlined on the annual inspection and/or service checklist (see attached). The results of the inspection may require a complete regulator overhaul. A COMPLETE REGULATOR OVERHAUL MUST BE PERFORMED EVERY TWO YEARS OR 200 DIVES A complete regulator overhaul must be performed per specifications every two years as outlined in the Mares Service Manual. This requires, at minimum, replacing all parts included in the service kit. Please see the annual regulator inspection and/or service checklist for details. MARES ABYSS 22 NAVY II REGULATOR AND OCTOPUS SERVICE PROCEDURES AND INTERVALS Service procedures and intervals for the Abyss 22 Navy II Regulator and Octopus are different than those described above due to US Navy testing protocols. Below are the Service Guidelines for the Abyss 22 Navy II Regulator and Octopus: Every Year or 100 Hours of use: Mares recommends a complete overhaul every year or 100 hours of use. Mares recommends the 1st Stage Tri-material Poppet be replaced every two years or 200 hours of use, OR when signs of wear are present. The ACT Poppet (Code #46201361) SHOULD NOT BE USED in the Abyss 22 Navy II 1st Stage. Abyss 22 Navy II Service Guidelines REQUIRE the use of the Tri-material Poppet (Code #46201132) in the 1st stage in order to conform to US Navy testing protocols. The Tri-material Poppet is NOT included in the Abyss 22 Navy II 1st Stage Service Kit. When ordering Abyss 22 Navy II 1st Stage service kits, please order the Tri-material Poppet as a separate line item. IMPORTANT All service and repair procedures on Mares products should performed by qualified Mares Service Technicians at authorized Mares Dealers and Service Centers. Service Technicians should have the Mares Service Manual and Spare Parts Catalog readily available for reference while performing service procedures and closely follow the recommended procedures and guidelines outlined in these materials.

2015 - revised 2015 Technical Bulletin ANNUAL REGULATOR INSPECTION CHECKLIST OCT. 27, 2015 Date.../.../...Make / Model... Serial #... Customer Name... Purchase Date... /.../... TEST 1 Inspect Filter Pass Fail Check for debris or discoloration. TEST 2 Inspect HP Chamber area Pass Fail Inspect for dirty, rust, or corrosion. TEST 3 Hose Inspection Pass Fail Pull back hose protectors. Check that the hoses are secure in the hose crimp. TEST 4 Inspect 2 nd Stage Exhaust Valve Pass Fail Check valve and sealing surface for cleanliness, shape, and seal. TEST 5 Inspect Mouthpiece Pass Fail Inspect for tears, cracks or holes. Replace if necessary. TEST 6 2nd Stage Diaphragm Inspection Pass Fail Attempt inhalation without pressurization. Check for perfect seal. TEST 7 Intermediate Pressure Check Pass Fail Check for stable IP. IP must be within acceptable range per Service manual. TEST 8 Cracking Effort Pass Fail Check CE. CE must be within acceptable range per Service Manual. TEST 9 Pressurized Immersion test Pass Fail Pressurize and immerse unit. Test for any leaks. IMPORTANT 1. If the regulator fails Checklist Item 1, 2 or 9: A complete Regulator Overhaul is required 2. If the regulator fails Checklist Item 7 or 8: If the regulator can be adjusted within specifi ation, it passes. If not, a Complete Overhaul is required 3. If the regulator fails Checklist Item 3, 4, 5,or 6: The defective parts associated with the Checklist Item may be replaced, OR A Complete Regulator Overhaul maybe performed IMPORTANT All service and repair procedures on Mares products should performed by qualified Mares Service Technicians at authorized Mares Dealers and Service Centers. Service Technicians should have the Mares Service Manual and Spare Parts Catalog readily available for reference while performing service procedures and closely follow the recommended procedures and guidelines outlined in these materials.

2015 - revised 2015 12S First Stage F1 12S. REQUIRED TOOLS AND SUPPLIES Tool Description #Code Tool Description #Code B-21 46106221 B-5 46106205 B-13 (10mm) 46106213 B-25 (25mm) 46106253 Hex 4mm No code B-4 (5mm) 46106204 B-6 46106206 B-16 (32mm) 46106216 B-18 (14mm) 46106218 B-41 46201041 B-14 46106214 O-ring removal Tool 46201387 Compressed air supply circuit or tank (2600-2900 PSI/ 185-200 bar) Compressed air gun (120-145 PSI/8-10 bar) Ultrasonic cleaner & Descaling solution (e.g. Deox Extra type) or similar Test Bench (#416920) or Intermediate Pressure Gauge (46106252) Christo-Lube MCG 111 Lubrication Technology or equal Loctite 415 or similar) Neoprene Workpad (449822) First Stage service kit # 46201370 INT / DIN - # 46201371 INT / DIN Viton Nylon brush Bench vise Flat screwdriver (Usag 326 PH 0) or similar

2015 - revised 2015 12S First Stage F2 12S. DISASSEMBLY The 12S Service Manual, should be readily available for reference while performing all maintenance and/or service procedures. 1. Loosen the Dust Cap (24 INT- 62 DIN) from the First Stage. 2. Remove the Second Stage hose using the 14mm wrench (B18). 3. Insert the threaded bar Tool (B5) to a First Stage stage LP port. Place the threaded bar Tool (B5) in a bench vise (if available) to hold the First stage during the disassembly. WARNING! IF THE FIRST STAGE IS USED FOR DIVES WITH OXYGEN-ENRICHED MIXTURES, STRICTLY FOLLOW ALL THE INSTRUCTIONS PROVIDED IN THIS MAINTENANCE MANUAL IN THE NITROX CHAPTER (EN 13949) BEFORE BEGINNING DISASSEMBLY-REASSEMBLY- ADJUST.

2015 - revised 2015 12S First Stage F3 12S. DISASSEMBLY INT (section 4) DIN/Nitrox (section 5)

2015 - revised 2015 12S First Stage F4 12S. DISASSEMBLY 4.1 Remove the Yoke Retainer Nut (7) and the Yoke (3) using the special 25mm wrench (B1) and remove the Plastic Ring (154). 4.2 Using the Retaining Ring Pliers (B14), remove the Retaining Ring (2), Filter (60). 4.1 12S. DISASSEMBLY DIN-NX 4.2 5.1 Unscrew the O-ring Seat DIN (187-186nx) from the Body Din Connector (48-50nx) with a 4mm Allen wrench. 5.2 Remove the O-ring (188-198nx) from the O-ring Seat (187-186nx). 5.3 Remove the Conical Filter (56) from the Body Din connector (48-50nx), by turning the First Stage Body upside down. 5.4 Insert a 5mm Allen wrench (B4) inside the Body Din Connector (48-50nx) and unscrew it completely. To make this step easier, a wrench (as shown in the picture) can help. 5.1 5.5 Remove the Body Din Connector DIN (48-50nx) and the DIN Ring Nut (49-199nx). Remove the O-ring (171) from the DIN fitting Body (48-50nx). 5.6 Using a 32mm wrench (B16), unscrew the Connection Body DIN (192). 5.7 Remove the O-ring (83) from the Connection Body DIN (192). 5.3 5.4 5.6

2015 - revised 2015 12S First Stage F5 12S. DISASSEMBLY 6. Remove the HP Chamber assembly (4), Spring (8), the First Stage valve(10), and the 29.3mm Pin (12) from the First Stage Body. 7. Remove the O-ring (6) and Back Up Ring (5) from the HP Chamber (4) using a plastic or brass removal Tool. WARNING! DO NOT USE SHARP OR POINTED TOOLS MADE OF STEEL OR OTHER MATERIALS, TO AVOID SCRATCHING THE SURFACES OF THE HP CHAMBER. 8. With the help of a flat screwdriver remove the Protection Cap (157). Unscrew the Regulating Nut (196) using a 10mm Allen wrench (B13) and unscrew Locking Nut (17) using the 32mm wrench (B16). Be careful to avoid damaging the chrome plating on the Retaining Nut (17) when disassembling Cap. 8 9. Remove the First Stage Diaphragm Spring (16) and plastic Spring Base Plate (15). 10. Remove the Diaphragm (14) and the First Stage Poppet Button (13) following the instruction described in Option a and Option b. Option a Insert the nozzle (#415724) of a low pressure compressed air gun into the First Stage HP Chamber. Use short bursts of low pressure air to dislodge the Diaphragm (14). Once the Diaphragm is dislodged, remove it and the Poppet Button (13). Be sure that all LP & HP plugs are assembled on First Stage. 8.1 Option b Place the First Stage on a flat surface with the Diaphragm side facing down. Place the special Tool (B6) in the First Stage HP Chamber and insert the Poppet Pin (12) falling down through the tool and the HP Seat (115) so that it stays in its original position in the First Stage button. Remove the Tool (B-6) from the HP chamber, and gently press on the Pin with the plastic end of Tool (B-41) to dislodge and remove the Poppet Button and Diaphragm. WARNING! DO NOT USE SHARP OR POINTED TOOLS TO REMOVE THE DIAPHRAGM. SCRATCHES ON THE SURFACES OF THE DIAPHRAGM MAY CAUSE HP LEAKING. Option b 10.b Option b 10.b

2015 - revised 2015 12S First Stage F6 12S. DISASSEMBLY 11. Remove the threaded bar Tool (B5) and all HP (53) and LP (20) pressure plugs from the First Stage Body. Remove all O-rings (19-52) from the HP and LP plugs. 12. Use the special Tool (B-41), to disassemble the HP Seat (115) by inserting it through the hole of low pressure port, and pressing up with it on the Center Valve. B-41 12 12S. INSPECTION AND CLEANING Reusable Rubber and Plastic Components Inspection Inspect all reusable rubber and plastic components for excessive wear and/or damage. Replace parts as necessary. Cleaning Clean all rubber and plastic components by washing them in a mixture of warm water and mild detergent. If necessary, scrub parts with a soft brush. Do not use abrasive cleaners, solvents or acids on rubber components. WARNING! SOLVENTS AND ACIDS MAY DAMAGE PLASTIC AND RUBBER PARTS. BEFORE CLEANING METAL COMPONENTS, MAKE SURE THAT ALL RUBBER AND PLASTIC PARTS HAVE BEEN REMOVED. Metal Components 12 Inspection Inspect all parts for excessive wear and/or damage. Replace parts as necessary. Cleaning Chrome plated, brass, and stainless steel parts are cleaned by immersing them in an ultrasonic cleaner containing a de-scaling agent such as Deox Extra or a solution of white vinegar diluted with hot water. A nylon brush may be used to remove any stubborn deposits. Be sure to rinse all parts in fresh water and allow to completely dry before proceeding with reassembly.

2015 - revised 2015 12S First Stage F7 12S. FIRST STAGE SERVICE KIT Certain key components of the First Stage should be replaced during the overhaul. These key parts are included in the 12S First Stage Service Kit (Code 46201184 (INT)- 46200964 (DIN)-46200678(NX)) and are identified in the RED BOXES above. SERVICE KIT # 46201184 (INT)- 46200964 (DIN)-46200678(NX)

2015 - revised 2015 12S First Stage F8 12S. REASSEMBLY Lubrication reduces the likelihood of damage during reassembly. Before beginning the reassembly procedure, lightly lubricate all O-rings with a high quality silicone grease. 13. Install the O-ring (74) on the HP Seat (115) andposition the Seat on the special Tool (B21). B-21 14. Insert the HP Seat (115) in the First Stage Body and gently press until the Seat is in its proper position. WARNING! TAKE SPECIAL CARE NOT TO DAMAGE THE SEAT WHEN INSERTING IT. IT IS CORRECTLY SEATED IF THE CONICAL SECTION IS VISIBLE WHEN VIEWING IT FROM THE HIGH PRESSURE CHAMBER. 13 15. Correctly position the Backup Ring (5) and O-ring (6) into the HP Chamber (4). WARNING! MAKE SURE THAT SIDE A OF THE BACK UP RING (3) IS FACING THE O-RING (9), AND SIDE B IS FACING THE BOTTOM OF THE HP CHAMBER (11). 16. Insert the First Stage valve (10) into the First Stage Body, with the flat part facing the Valve Seat (115). 17. Position the Spring (8) on the First Stage valve(10) and insert the HP Housing Assembly (4-5-6) into the spring (8). 14 SIDE - A 15a SIDE - B 15b

2015 - revised 2015 12S First Stage F9 12S. REASSEMBLY INT (section 18) DIN/Nitrox (section 19)

2015 - revised 2015 12S First Stage F10 12S. REASSEMBLY 18.1 Assemble Filter (60) over the HP Chamber (4), using the Retaining Ring pliers (B14), press down to fit the Retaining Ring (2) in its proper position above the Filter (60). Rotate the Retaining Ring to check its correct positioning. 18.2 Place the Plastic Ring (154). 18.1 WARNING! TO PREVENT THE YOKE RETAINER NUT (7) FROM LOOSENING, APPLY ONE OR TWO DROPS OF THREAD LOCKING COMPOUND ONTO THE THREADS PRIOR TO INSTALLATION. REMOVE ANY RESIDUAL THREAD LOCKING COMPOUND PRIOR TO APPLYING ANY NEW COMPOUND (LOTITE 415 OR SIMILAR). 18.3 Position Yoke (3) and Knob assembly (25) on First Stage Body (11).With wrench 25mm (B-1), tighten Yoke Retainer Nut (7). 18.3 If using a Torque Wrench, tighten to a torque of approximately 13-15 ft*lbf / 18-20 Nm.

2015 - revised 2015 12S First Stage F11 12S. REASSEMBLY DIN-NX 19.1 Insert the O-ring (83) into the Connecting Body HP DIN (192). Place the O-ring (83) in its Seat using a plastic rod. Check that it sits properly in place. 19.2 Using the 32mm wrench (B16) fully tighten the Connector Body HP DIN (192). If using a Torque Wrench, tighten to a torque of approximately 25 ft*lbs / 35 Nm. 19.1 19.3 Install the O-ring (171) on the Body Din Connector (48-50nx). WARNING! TO PREVENT THE BODY DIN CONNECTOR (24) FROM LOOSENING, APPLY ONE OR TWO DROPS OF THREAD LOCKING COMPOUND ONTO THE THREADS PRIOR TO INSTALLATION. REMOVE ANY RESIDUAL THREAD LOCKING COMPOUND PRIOR TO APPLYING ANY NEW COMPOUND (LOCTITE 415 OR SIMILAR). 19.4 Place the Locking Ring DIN (49-199nx) on the Connecting Body HP DIN (192) and fully tighten the Connecting Plug (48-50nx). 19.2 If using a Torque Wrench, tighten to a torque of approximately 15 ft*lbs / 20 Nm. 19.3 19.4

2015 - revised 2015 12S First Stage F12 12S. REASSEMBLY DIN-NX 19.5 Insert the Filter (56) into the Connecting Plug (48-50nx). Position the O-ring (188-198nx) on the Din O-ring Seat (187-186nx). 19.6 Screw the Din O-ring Seat (187-186nx) to the Connecting Plug (48-50nx) with a 4mm Allen wrench). If using a Torque Wrench, tighten to a torque of approximately 1.1-1.5 ft*lbf / 1,5-2 Nm. 19.5 20. Rotate the First Stage Body as illustrated and insert the Pin (12) in the center hole. 21. Place the Poppet Button (13) on the Pin (12), and press it to feel the response of the Spring (8). 22. Install the diaphragm (14) in the First Stage Body, making sure it is firmly seated in the Body. 19.6 Note the impression of the poppet button (13) on the First Stage Diaphragm. When re-installing the diaphragm (14), be sure to install it facing the same direction as disassembled. 20 21 22

2015 - revised 2015 12S First Stage F13 12S. REASSEMBLY 23. Place the Spring Base Plate (15) in the middle of the Diaphragm (14) and place the Spring (16) on the Spring Base Plate (15). 24. Install Retaining Nut (17) on the First Stage Body using the 32-mm wrench (B-16). If Using a Torque Wrench to tighten the Retaining Nut (17), use a tightening torque of approximately 26 ft*lbf / 35 Nm. 25. Using the 10mm Allen wrench (B13), Install the Regulating Nut (196) making 3 4 turns of the wrench only. 23 Do not over-tighten the Regulating Nut. Doing so can cause an increase in Intermediate Pressure, which can damage the LP Gauge and interfere with the IP adjustment procedure. 24 25

2015 - revised 2015 12S First Stage F14 12S. ADJUSTMENT Connect the First Stage to a full tank (at least 2600 psi/180 bar) or test bench, and open the air valve slowly to expel any foreign matter from the First Stage. 26. Remove the Threaded Bar Tool (B-5) from the First Stage Body. Install O-rings (52-19) on all HP and LP Port Plugs (53-20). 27. Install all HP and LP plugs on the First Stage Body, leaving the DFC and one additional LP port open for the Second Stage and IP Gauge. 27 28. Attach the intermediate pressure gauge (#46106252) or connect the LP hose from the LP port of a Test Bench to the open low pressure port. 29. Attach the Second Stage hose to the port marked DFC (without the Second Stage cover installed). If using a Torque Wrench, tighten hoses to a torque of 3-3.5 ft*lbs / 4-4,5 Nm. 29 TABLE 1: IP ADJUSTABLE RANGE HP Air Supply Intermediate Pressure (IP) 2900 psi 142 148 psi 200 bar 9.8 10.2 bar IP HP

2015 - revised 2015 12S First Stage F15 12S. ADJUSTMENT 30. Holding down the Second Stage demand lever, slowly open the tank valve and, almost simultaneously, release the demand lever. Read the value of the First Stage adjustment on the pressure gauge, and proceed as follows: No Second Stage free or intermittent air fl w can occur during the IP adjustment procedure. If any such fl w occurs, it will compromise the process and could cause the IP setting to be outside the acceptable range. 30.1 If the intermediate pressure is greater than the specified value (see table 1), use the 10mm Hex Wrench (B-13) to slowly loosen the Regulating Nut (196) until the specified value is obtained. 30.1 WARNING! WHEN THE INTERMEDIATE PRESSURE IS REDUCED, IT IS NECESSARY TO VENT THE EXCESS AIR IN ORDER TO OBTAIN A CORRECT READING OF THE NEW VALUE. 30.2 If the First Stage pressure is lower than the specified value (see table 1), slowly tighten the Adjusting Nut (19) until the specified value is obtained. Once the intermediate pressure has been correctly set, operate the Second Stage demand lever two to three times to make sure the intermediate pressure remains constant for a few minutes. 30.2 The Second Stage adjustment procedures may now be performed.

2015 - revised 2015 12S First Stage F16 12S. TROUBLESHOOTING Problem Probable Cause Solution 1. Intermediate Pressure too high Readjust IP per procedures CONTINUOUS AIR FLOW FROM SECOND STAGE (FREE FLOW) CAUSED BY: 1. AN INCREASE IN THE INTERMEDIATE PRESSURE, or 2. A CONTINUALLY INCREASING IP (IP CREEP) AIR LEAKS FROM FIRST STAGE DIAPHRAGM AIR LEAKS FROM THE FIRST STAGE HP/LP PORT PLUGS AND/OR HOSE PORTS AIR LEAKS BETWEEN YOKE AND TANK VALVE 2. Damaged First Stage Tri-material Poppet Replace Tri-material Poppet 2. Damaged Poppet Seat Replace Poppet Seat 2. Damaged HP Housing Assembly components or damaged HP Chanber Lose Locking Nut First Stage diaphragm damaged First Stage diaphragm seating surface damaged Damaged O-ring corrosion on metal surface Lose hose and/or port plug O-ring seal of tank valve corroded or damaged First stage Body (11) sealing surface damaged O-ring (71) damaged Check internal surfaces of HP Chamber. Clean or replace HP Chamber. Replace O-ring and/or Back Up Ring. Tighten CWD Kit Body Replace the diaphragm Replace the First Stage Body Clean the Seat and/or replace O-ring Tighten hose and/or plug Clean the Seat of the tank valve and replace the O-ring Replace First Stage Body (INT) Replace O-ring

2015 - revised 2015 12S First Stage F17 12S. DRAWING E 118 Updated: 16/12/2013

2015 - revised 2015 12S First Stage F18 12S. CHART 41 Updated: 20/01/2015 CHART NO: 41 1st STAGE 12S / 12S NX UPDATED: 20/01/2015 REF CODE DESCRIPTION REF CODE DESCRIPTION 1 A FIRST STAGE BODY 12S DIN 83 46110225 OR 2068 2 46201262 RETAINING RING, 1st STG FILTER (10pcs) 83 46110420 OR 2068 VITON 3 46201074 YOKE k9 115 46186216 HP SEAT "MR" 4 D HP CHAMBER 154 46200930 PLASTIC RING INT 12S 5 46110506 BACKUP RING PK 157 46200929 HOCK CAP, 1st STAGE 12S 6 46201253 OR 2012 (10pcs) 171 46110110 OR 2037 6 46110401 OR 2012 VITON 171 46200298 OR 2037 VITON 7 46185212 NUT YOKE RETAINER 1ST STAGE MR12 186 N O-RING SEAT NITROX (EN 13949) 8 46201284 SPRING, 1ST STAGE VALVE, MR12 46200946 O-RING SEAT DIN 12S 9 46201132 POPPET 1 STG TRI-MATERIAL 10 PCS 188 46110247 OR 3043 11 A FIRST STAGE BODY 12S INT 188 46200620 OR 3043 VITON 12 46201142 PIN POPPET 29,3mm 189 I CWD Dry 12S PISTON 13 46185032 BUTTON, 1ST ST. POPPET 190 46200923 PLASTIC RING CWD DRY 12S 14 46201263 DIAPHRAGM, MR12 (10pcs) 191 I HOCK CUP CWD Dry 12S 15 46185034 PLATE SPRING BASE 192 46201148 CONN. BODY HP DIN 12S 16 46201285 SPRING DIAPHRAGM 1ST STAGE REG. 193 46200926 CWD Dry DIAPHRAGM 17 46201137 RETAINING NUT 194 I METAL PLATE SPRING BASE 18 46185028 REGULATING NUT, CWD 195 I OR 2-322 19 46201254 OR 106 (10pcs) 192 46200942 CONN. BODY HP DIN 12S 19 46110402 OR 106 VITON 196 46184511 REGULATING NUT, 1ST STAGE 20 46185204 LP PLUG 3/8", 1ST STAGE, REGS. 197 46201230 REGULATING NUT, 1ST STAGE 21 K CWD BODY 199 N NX 200 BAR, LOCKING RING (EN 13949) 24 46185010 DUST CAP INT 25 46184079 YOKE KNOB ASSEMBLIES 48 46200934 CONNECTING PLUG, DIN 300 BAR 12S A 416209 FIRST STAGE MR12S ASSEMBLY (INT-DIN) 49 46200932 DIN 300 BAR THREADED LOCKING RING D 46185210 HP HOUSING ASSY, 1ST STAGE (4-5-6) 50 N CONNECTING PLUG, NX CONNECTOR D 46186259 HP HOUSING ASSY, 1ST STD (Viton O-rings) 52 46201256 OR 108 (10pcs) F 416804 DIN CONNECTOR 300 12S *ITM25 52 46110404 OR 108 VITON I 416855 KIT CWD DRY 53 46185205 HP PLUG 7/16", 1ST STAGE K 416851 KIT CWD OIL 56 46200948 FILTER, DIN CONNECTOR, 12S --- 46201370 SERVICE KIT 12S INT/DIN 57 I CWD DRY BODY --- 46201371 SERVICE KIT 12S INT/DIN VITON 58 46185301 DIAPHRAGM, CWD KIT 46200678 SERVICE KIT MR 12 NITROX (EN 13949) 59 K CWD LOCKING RING N 46201274 NITROX CONNECTOR 12S (EN 13949) 60 46201150 FILTER, INT CONNECTOR, 12S (50-56-62-83-171-186-192-198-199 62 46183014 DUST CAP DIN 74 46201255 OR 2031 (10pcs) Parts highlighted in red are included in the service kits 46201370-74 46110403 OR 2031 VITON 46201371

15X FIRST STAGE 15X FIRST STAGE

2015 - revised 2015 ANNUAL REGULATOR INSPECTION CHECKLIST OCT. 27, 2015 Date.../.../...Make / Model... Serial #... Customer Name... Purchase Date... /.../... TEST 1 Inspect Filter Pass Fail Check for debris or discoloration. TEST 2 Inspect HP Chamber area Pass Fail Inspect for dirty, rust, or corrosion. TEST 3 Hose Inspection Pass Fail Pull back hose protectors. Check that the hoses are secure in the hose crimp. TEST 4 Inspect 2 nd Stage Exhaust Valve Pass Fail Check valve and sealing surface for cleanliness, shape, and seal. TEST 5 Inspect Mouthpiece Pass Fail Inspect for tears, cracks or holes. Replace if necessary. TEST 6 2nd Stage Diaphragm Inspection Pass Fail Attempt inhalation without pressurization. Check for perfect seal. TEST 7 Intermediate Pressure Check Pass Fail Check for stable IP. IP must be within acceptable range per Service manual. TEST 8 Cracking Effort Pass Fail Check CE. CE must be within acceptable range per Service Manual. TEST 9 Pressurized Immersion test Pass Fail Pressurize and immerse unit. Test for any leaks. IMPORTANT 1. If the regulator fails Checklist Item 1, 2 or 9: A complete Regulator Overhaul is required 2. If the regulator fails Checklist Item 7 or 8: If the regulator can be adjusted within specifi ation, it passes. If not, a Complete Overhaul is required 3. If the regulator fails Checklist Item 3, 4, 5,or 6: The defective parts associated with the Checklist Item may be replaced, OR A Complete Regulator Overhaul maybe performed IMPORTANT All service and repair procedures on Mares products should performed by qualified Mares Service Technicians at authorized Mares Dealers and Service Centers. Service Technicians should have the Mares Service Manual and Spare Parts Catalog readily available for reference while performing service procedures and closely follow the recommended procedures and guidelines outlined in these materials.

2015 - revised 2015 15X First Stage F1 15X. REQUIRED TOOLS AND SUPPLIES Tool Description #Code Tool Description #Code B-18 (14mm) 46106218 B-4 (5mm) 46106204 B-1 (25mm) 46106201 B-13 (10mm) 46106213 Hex 4mm No code Snap Ring Pliers (B14) 46106214 B-6 46106206 B-21 46106221 B-17 (17mm) 46106217 B-42 46201042 B-5 46106205 O-Ring removal tool 46201387 Compressed air supply circuit or tank (2600-2900 PSI/ 185-200 bar) Compressed air gun (120-145 PSI/8-10 bar) Ultrasonic cleaner & Descaling solution (e.g. Deox Extra type) or similar Loctite 415 or similar Test Bench (#416920) or Intermediate Pressure Gauge (46106252) Christo-Lube MCG 111 Lubrication Technology or equal Neoprene Workpad (449822) First Stage service kit # 46201355 INT / DIN - #46201358 INT / DIN Viton Nylon brush

2015 - revised 2015 15X First Stage F2 15X. DISASSEMBLY WARNING! IF THE FIRST STAGE IS USED TO DIVE WITH OXYGEN-ENRICHED MIXTURES, STRICTLY FOLLOW ALL THE INSTRUCTION PROVIDED IN THE MAINTENANCE MANUAL, IN THE NITROX CHAPTER (EN 13949 FOR EUROPEAN COUNTRY) BEFORE BEGINNING DISASSEMBLY-REASSEMBLY-ADJUST. 3.a 1. Loosen the Dust Cap (33 INT- 28 DIN) from the First stage. 2. Remove the Second Stage Hose using the 14mm wrench (B18). 3. Remove the First Stage Protection Cap (46), by turning it a little bit right and left. 3.b 4. Remove all LP plugs (40) and HP plugs (39) using a 4mm Allen wrench. 5. Remove the O-rings 13 form the LP plugs (39) and O-rings (12) from the HP plugs (39). 6. Insert the threaded bar Tool (B5) to a First Stage stage LP port. Place the threaded bar tool (B5) in a bench vise (if available) to hold the First Stage during the disassembly. 7. Using a 6mm Allen wrench (B-8), unscrew the HP chamber (11), remove the Spring (8), the First Stage Valve (5), and the Pin 26,5mm (1) from the First Stage. 7 8. Remove the O-ring (10), and Washer (7) from the HP Chamber (11). 9. Extract the O-ring (9) and the Backup Ring (3) from the HP Chamber (11), using an o-ring removal Tool made in plastic or brass. WARNING! DO NOT USE SHARP OR POINTED TOOLS MADE OF STEEL OR OTHER MATERIALS, TO AVOID SCRATCHING THE SURFACES OF THE HP CHAMBER. 7 8-9 9.b

2015 - revised 2015 15X First Stage F3 15X. DISASSEMBLY 10. Flip the First Stage over as shown in the picture. Unscrew the Regulating Nut (19), using a 10mm Allen wrench (B13) and remove the First Stage Diaphragm Spring (17) and the Spring Base Plate (16). 11. Unscrew the Retaining Nut (18) using a 25mm Allen wrench (B1). 10.a 12. Remove the First Stage Diaphragm (15) and the Antifriction Ring (47) following one of the two steps described below: Option a Insert the nozzle (#415724) of a low pressure compressed air gun into the First stage HP chamber. Use short bursts of low pressure air to dislodge the Diaphragm (15). Once the Diaphragm is dislodged, remove it and the Poppet Button (14). Be sure that all LP & HP plugs are assembled on First Stage. 10.b Option b Place the First Stage on a flat surface with the Diaphragm side facing down. Position the special Tool (B6) inside the First Stage HP chamber and let the Poppet Pin (1) falling down through the tool and the HP Seat (2), so that it stays in its original position, in the First Stage button (14). Remove the Tool (B-6) from the HP chamber, and gently press the Pin with the plastic end of tool (B-41) to dislodge and remove the Poppet Button and Diaphragm. WARNING! DO NOT USE SHARP OR POINTED TOOLS TO REMOVE THE DIAPHRAGM. SCRATCHES ON THE SURFACES OF THE DIAPHRAGM MAY CAUSE HP LEAKING. If the Antifriction Ring (47) is still in its Seat after having completed step 12, remove it paying attention not to damage the First Stage Body. WARNING! DO NOT USE SHARP OR POINTED TOOLS TO REMOVE THE ANTIFRICTION RING (47). TO AVOID DAMAGING THE DIAPHRAGM. Option b 13. Insert the special Tool (B42) in the center hole of the First Stage Body (4) and remove the HP Seat (2). 14. Remove the O-ring (20) from the HP Seat (2). 13

2015 - revised 2015 15X First Stage F4 15X. DISASSEMBLY INT (Section 15) DIN/Nitrox (Section 16)

2015 - revised 2015 15X First Stage F5 15X. DISASSEMBLY INT 15.1 Unscrew the Yoke Retainer Nut (29) using the special Tool 25mm (B1) and remove the Yoke assembly (29-30-31-32). 15.2 Disassemble the Retaining Ring (32) using the snap ring pliers (B14) and remove the Filter (30) and the Spring Filter (31). 15.3 Remove the O-ring (10) from the Yoke Retainer Nut (29). 15.1 WARNING! BE CAREFUL TO AVOID DAMAGING THE CHROME PLATING ON THE NUT YOKE RETAINER (23) WHEN DISASSEMBLING. 15X. DISASSEMBLY DIN - NX 15.2 16.1 Unscrew the O-ring Seat (27 38 NX) from the Body Din Connector (24 35 NX), using a 4mm Allen wrench. 16.2 Remove the O-ring (26 37 NX) from the O-ring Seat (27 38 NX). 16.3 Remove the Conical Filter (25 30 NX) from the Body Din connector (24 35 NX), by turning the First Stage Body upside down. 16.4 Insert a 5mm Allen wrench (B4) inside the Body Din Connector (24-35 NX) and unscrew it completely. To make this step easier, a wrench (as shown in the picture) can help. 16.5 Remove the O-ring (10) from the Body Din Connector (24 35 NX). 16.1 16.3 16.4

2015 - revised 2015 15X First Stage F6 15X. INSPECTION AND CLEANING Reusable Rubber and Plastic Components Inspection Inspect all reusable rubber and plastic components for excessive wear and/or damage. Replace parts as necessary. Cleaning Clean all rubber and plastic components by washing them in a mixture of warm water and mild detergent. If necessary, scrub parts with a soft brush. Do not use abrasive cleaners, solvents or acids on rubber components. WARNING! SOLVENTS AND ACIDS MAY DAMAGE PLASTIC AND RUBBER PARTS. BEFORE CLEANING METAL COMPONENTS, MAKE SURE THAT ALL RUBBER AND PLASTIC PARTS HAVE BEEN REMOVED. Metal Components Inspection Inspect all parts for excessive wear and/or damage. Replace parts as necessary. Cleaning Chrome plated, brass, and stainless steel parts are cleaned by immersing them in an ultrasonic cleaner containing a de-scaling agent such as Deox Extra or a solution of white vinegar diluted with hot water. A nylon brush may be used to remove any stubborn deposits. Be sure to rinse all parts in fresh water and allow to completely dry before proceeding with reassembly.

2015 - revised 2015 15X First Stage F7 15X. FIRST STAGE SERVICE KIT Certain key components of the First Stage should be replaced during the overhaul. These key parts are included in the 15X First Stage Service Kit (Code 46201355 INT/DIN 46201444 NX) and are identified in the RED BOXES above. SERVICE KIT # 46201355 INT / DIN 46201444 NX

2015 - revised 2015 15X First Stage F8 15X. REASSEMBLY Lubrication reduces the likelihood of damage during reassembly. Before beginning the reassembly procedure, lightly lubricate all O-rings with a high quality silicone grease. 17. Install the o-ring (20) on the HP Seat (2), and position the Seat on the special Tool (B21). 18. Insert the HP Seat (2) into the First Stage Body and gently press until the Seat is properly seated. WARNING! TAKE SPECIAL CARE NOT TO DAMAGE THE SEAT WHEN INSERTING IT. IT IS CORRECTLY SEATED IF THE CONICAL SECTION IS VISIBLE WHEN VIEWING IT FROM THE HIGH PRESSURE CHAMBER. 17 19. Correctly position the Backup Ring (3) and the O-ring (9) into the HP Chamber (11). WARNING! MAKE SURE THAT SIDE A OF THE BACK UP RING (3) IS FACING THE O-RING (9), AND SIDE B IS FACING THE BOTTOM OF THE HP CHAMBER (11). 20. Install the O-ring (10), and the Washer (7) on the HP Chamber (11). 21. Insert the First Stage valve (5) inside the First Stage Body, with the flat part facing the Valve Seat (2). 18 22. Position the spring (8) on the First Stage valve (5) and tighten the HP chamber (11) using a 6mm Allen wrench (B4). SIDE - A SIDE - B

2015 - revised 2015 15X First Stage F9 15X. REASSEMBLY 23. Flip the First Stage Body over (as shown in the picture) and insert the First Stage pin 26,5mm (1) in the center hole of the Body. 24. Position the First Stage valve button (14) on the First Stage Pin (1) and press it down to feel the response of the Spring (8). 25. Place the Diaphragm (15) in the First Stage Body, making sure is firmly seated in the Body. 23 Note the impression of the Poppet Button (14) on the First Stage Diaphragm. When re-installing the Diaphragm (15), be sure to install it facing the same direction as disassembled. 26. Correctly position the Antifriction Ring (47) on the Diaphragm (15). 27. Place the Spring Base Plate (16) in the middle of the Diaphragm (15). Use a 25-mm wrench (B1) to fully tighten the retaining nut to the First Stage Body. 25 If Using a Torque Wrench to tighten the Retaining Nut (17), use a tightening torque of 25 Nm / 18 ft*lbf. 28. Place the Spring (17) on the Spring Base Plate (14). 26 29. Using the 10mm Allen wrench (B13), Install the Regulating Nut (196) making 3 4 turns of the wrench only. Do not over-tighten the Regulating Nut. Doing so can cause an increase in Intermediate Pressure, which can damage the LP Gauge and interfere with the IP adjustment procedure. 27 29

2015 - revised 2015 15X First Stage F10 15X. REASSEMBLY INT (Section 30) DIN/Nitrox (Section 31)

2015 - revised 2015 15X First Stage F11 15X. REASSEMBLY INT 30.1 Rotate the First Stage as shown in the picture. 30.2 Assemble the Filter Spring (31) and the Filter (30) in the Yoke Retainer Nut (29). 30.3 Using the Retaining Ring pliers (B14), press down to fit the Retaining Ring (32) above the Filter (30) and in the Yoke Retainer Nut (29). The Retaining ring should be positioned with the sharp side up and rounded side down. Once installed, rotate the Retaining Ring to ensure it is correctly positioned. 30.1 30.4 Install the O-ring (10) on the Yoke Retainer Nut (29). 30.5 Install the Yoke Knob (22) on the Yoke (21). Place the Yoke (21) on the First Stage Body. 30.6 Using a 25mm wrench (B1), fully tighten the Yoke Retainer Nut (29). 30.3 If using a Torque Wrench, tighten to a torque of approximately 13-15 ft*lbf / 18-20 Nm. WARNING! TO PREVENT THE YOKE RETAINER NUT (7) FROM LOOSENING, APPLY ONE OR TWO DROPS OF THREAD LOCKING COMPOUND ONTO THE THREADS PRIOR TO INSTALLATION. REMOVE ANY RESIDUAL THREAD LOCKING COMPOUND PRIOR TO APPLYING ANY NEW COMPOUND (LOCTITE415 OR SIMILAR). 30.4 30.7 Install the O-rings (12) on the HP plugs (39), and the O-rings (13) on the LP plugs (40). 30.6 30.8 Install all HP and LP plugs on the First Stage Body, leaving the DFC and one additional LP port open for the Second Stage and IP Gauge.

2015 - revised 2015 15X First Stage F12 15X. REASSEMBLY DIN - NX 31.1 Insert the Body DIN Connector (24 35 NX) into the Threaded Locking ring (23 34 NX). 31.2 Position the O-ring (10) on the Body Din Connector (24 35 NX). 31.3 Using a 5-mm Allen wrench (B 4), tighten the Body DIN Connector (24 35 NX) to the First Stage body. WARNING! TO PREVENT THE BODY DIN CONNECTOR (24) FROM LOOSENING, APPLY ONE OR TWO DROPS OF THREAD LOCKING COMPOUND ONTO THE THREADS PRIOR TO INSTALLATION. REMOVE ANY RESIDUAL THREAD LOCKING COMPOUND PRIOR TO APPLYING ANY NEW COMPOUND (LOCTITE 415 OR SIMILAR). 31.1-31.2 If using a Torque Wrench, tighten to a torque of approximately 15 ft*lbs / 20 Nm. 31.3 31.4 Insert the Conical Filter (25 30 NX) in the Body Din Connector (24 35 NX). 31.5 Place the O-ring (26 37 NX) on the Din O-ring Seat (27 38 NX). 31.6 Using a 4mm Allen wrench, tighten the Din O-ring Seat (27 38 NX) to the Body Din Connector (24 35 NX). If using a Torque Wrench, tighten to a torque of approximately 1.1-1.5 ft*lbs / 1,5-2 Nm. 31.4 31.7 Remove the Threaded Bar Tool (B-5) from the First Stage Body. Install O-Rings (12 13) on all HP and LP Port Plugs (39-40). 31.6

2015 - revised 2015 15X First Stage F13 15X. REASSEMBLY DIN - NX 31.8 Install the O-rings (12) on the HP plugs (39), and the O-rings (13) on the LP plugs (40). 31.9 Install all HP and LP plugs on the First Stage Body, leaving the DFC and one additional LP port open for the Second Stage and IP Gauge. 15X. ADJUSTMENT Connect the First Stage to a full tank (at least 2600 psi/180 bar) or test bench, and open the air valve slowly to expel any foreign matter from the fi st stage. 32. Attach the intermediate pressure gauge (#46106252) or connect the LP hose from the LP port of a Test Bench to the open low pressure port. 33. Attach the Second Stage hose to the port marked DFC (without the 2nd Stage cover installed). If using a Torque Wrench, tighten hoses to a torque of 3-3.5 ft*lbs / 4-4,5 Nm.

2015 - revised 2015 15X First Stage F14 15X. ADJUSTMENT TABLE 1: IP ADJUSTABLE RANGE HP Air Supply Intermediate Pressure (IP) 2900 psi 142 148 psi 200 bar 9.8 10.2 bar 34 Holding down the Second Stage Demand Lever, slowly open the tank valve and, almost simultaneously, release the Demand Lever. Read the value of the First Stage adjustment on the pressure gauge, and proceed as follows: IP No Second Stage free or intermittent air fl w can occur during the IP adjustment procedure. If any such fl w occurs, it will compromise the process and could cause the IP setting to be outside the acceptable range. 34.1 If the intermediate pressure is greater than the specified value (see table 1), use the 10mm Hex Wrench (B-13) to slowly loosen the Regulating Nut (19) until the specified value is obtained. HP WARNING! WHEN THE INTERMEDIATE PRESSURE IS REDUCED, IT IS NECESSARY TO VENT THE EXCESS AIR IN ORDER TO OBTAIN A CORRECT READING OF THE NEW VALUE. 34.2 If the First Stage pressure is lower than the specified value (see table 1), slowly tighten the Adjusting Nut (19) until the specified value is obtained. Once the intermediate pressure has been correctly set, operate the Second Stage demand lever two to three times to make sure the intermediate pressure remains constant for a few minutes. 34.1 The Second Stage adjustment procedures may now be performed. 34.2

2015 - revised 2015 15X First Stage F15 15X. TROUBLESHOOTING Problem Probable Cause Solution 1. Intermediate Pressure too high Readjust IP per procedures CONTINUOUS AIR FLOW FROM SECOND STAGE (FREE FLOW) CAUSED BY: 1. AN INCREASE IN THE INTERMEDIATE PRESSURE, or 2. A CONTINUALLY INCREASING IP (IP CREEP) AIR LEAKS FROM FIRST STAGE DIAPHRAGM AIR LEAKS FROM THE FIRST STAGE HP/LP PORT PLUGS AND/OR HOSE PORTS AIR LEAKS BETWEEN YOKE NUT RETAINER AND TANK VALVE 2. Damaged First Stage Tri-material Poppet Replace Tri-material Poppet 2. Damaged Poppet Seat Replace Poppet Seat 2. Damaged HP Housing Assembly components or damaged HP Chanber Lose Locking Nut First Stage Diaphragm damaged First Stage diaphragm seating surface damaged Damaged O-ring corrosion on metal surface Lose hose and/or port plug O-ring seal of tank valve corroded or damaged Yoke Nut (7) sealing surface damaged O-Ring (71) damaged Check internal surfaces of HP Chamber. Clean or replace HP Chamber. Replace O-ring and/or Back Up Ring. Tighten CWD Kit Body Replace the Diaphragm Replace the First Stage Body Clean the Seat and/or replace O-ring Tighten hose and/or plug Clean the Seat of the tank valve and replace the O-ring Replace Yoke Nut Replace O-ring

2015 - revised 2015 15X First Stage F16 15X. DRAWING E119 Updated: 03/12/2015

2015 - revised 2015 15X First Stage F17 15X. CHART 42 Updated: 10/01/2017 CHART NO: 42 FIRST STAGE 15X UPDATED: 10/01/2017 REF CODE DESCRIPTION REF CODE DESCRIPTION 1 46201303 PIN 26,5 37 46110227 OR 3056 2 46186216 HP SEAT MR 38 N O-RING SEAT NITROX (EN13949) 3 46110506 BACKUP RING PK 39 46185205 HP PLUG 7/16, FIRST STAGE 4 F FIRST STAGE BODY 40 46185204 LP PLUG 3/8, FIRST STAGE, REGS. 5 46201361 FIRST STAGE POPPET ACT 41 C CWD DRY PISTON 7 46201291 WASHER, HP CHAMBER 42 C PLASTIC RING CWD DRY 8 46201284 SPRING, FIRST STAGE VALVE 43 C CWD DRY BODY, 52 9 46110101 OR 2012 44 46200558 DIAPHRAGM, CWD KIT 10 46110211 OR 2050 45 C HOCK CUP CWD DRY 11 46201275 HP CHAMBER 15 46 46201302 PROTECTION CAP 15X 12 46110108 OR 108 47 46200581 ANTI-FRICTION RING 13 46110106 OR 106 14 46200545 BUTTON FIRST STAGE POPPET 15 46201476 DIAPHRAGM ASSEMBLIES 16 46200582 PLATE SPRING BASE, FIRST STAGE --- 416809 DIN CONNECTOR 300 BAR (9-7-11-15-24-25) 17 46201285 SPRING DIAPHRAGM FIRST STAGE C 416857 KIT CWD DRY (41-42-43-44-45) 18 46201118 LOCKING NUT F 416237 FIRST STAGE 15X ASSEMBLY (INT-DIN) 19 46201120 REGULATING NUT, FIRST STAGE --- 46201355 SERVICE KIT FIRST STAGE 52X/22X/15X INT/DIN 20 46110107 OR 2031 21 46201074 YOKE K11 NITROX VERSION 22 46184079 YOKE KNOB N 46201443 NITROX CONNECTOR 200 BAR (EN13949) - NBR ORINGS 23 46200546 DIN 300 BAR THREADED LOCKING RING --- 46201444 SERVICE KIT NX 1ST 52/22 (EN13949) - NBR ORINGS 24 46201102 BODY, DIN CONNECTOR 300 BAR 25 46200561 CONICAL FILTER, DIN 26 46110247 OR 3043 27 46200547 O-RING SEAT, DIN 28 46200562 PROTECTION CAP DIN 29 46201100 NUT,YOKE RETAINER 30 46186202 CONICAL FILTER, INT 31 46185013 SPRING, FILTER FIRST STAGE 32 46185015 RETAINING RING, FIRST STAGE FILTER 33 46185010 DUST CAP INT Parts highlighted in red are included in the service kits 46201355 34 N NITROX LOCKING RING 200 Bar (EN13949) As far as the first stages made before X series (2015), you can get the codes of the service kit Viton, Nitrox connector (Viton) and Service kit NX 35 N BODY, NITROX CONNECTOR 200 BAR (EN13949) (Viton) in the previous Spare Part catalogue (2015 and before) or in the 36 46200658 YELLOW DUST CAP, NITROX Accessories 1 section of this Spare Part Catalogue

2S FIRST STAGE 2S FIRST STAGE

2017 - revised 2017 2S First Stage F1 2S. REQUIRED TOOLS AND SUPPLIES Tool Description #Code Tool Description #Code B-23 46106223 B-5 46106205 B-22 46106222 B-25 (25mm) 46106253 Hex 4mm No code B-18 (14mm) 46106218 B-14 46106214 O-ring removal Tool 46201387 Compressed diver grade air supply circuit or tank (2600-2900 PSI/ 185-200 bar) Compressed air gun (120-145 PSI/8-10 bar) Ultrasonic cleaner & Descaling solution (e.g. Deox Extra type) or similar Test Bench (#416920) or Intermediate Pressure Gauge (46106252) Silicone grease (Bluesil Vacuum GRS- Bluestar Silicones or Christo-Lube MCG 111 Lubrification Technology or equal) Loctite 415 or similar Neoprene Workpad (449822) First Stage service kit # 46201108 INT / DIN 46201130 INT / DIN Viton Nylon brush Bench vise Flat screwdriver (Usag 326 PH 0) or similar Torque Wrench

2017 - revised 2017 2S First Stage F2 2S. DISASSEMBLY WARNING IF THE FIRST STAGE IS USED TO DIVE WITH OXYGEN-ENRICHED MIXTURES, IT MUST BE O2 CLEANED. MARES RECOMMENDS O2 CLEANING USING THE PROCEDURES OUTLINED IN THE MARES O2 CLEANING GUIDELINES, AND FOLLOWING THE DISASSEMBLY/ REASSEMBLY/ADJUST PROCEDURES OUTLINED IN THIS MANUAL. OXYGEN ENRICHED MIXTURES IS DEFINED IN THE US AS OVER 40% O2. IN EU COUNTRIES IT IS DEFINED IN THE EN 13949 NORM. 1. Loosen the Dust Cap (10 INT- 28 DIN) from the First Stage and remove the Yoke Knob (22). 2. Remove the Second Stage hose using the 14mm wrench (B18). 3 3. Remove the Cover (9) by twisting and pulling it. If difficulty is en ountered removing the Cover (9) by hand, use a flat sc ewdriver. 4. Insert the threaded bar Tool (B5) to a First Stage stage 3/8 LP port. 4 For best results, place the threaded bar Tool (B5) in a bench vise to hold the First stage during the disassembly. 5. Unscrew the First Stage Cap (19) using the 1st Stage Cap Wrench (23), and remove the Spring (4) and the Plastic Washers (27), if present. 4 There should be no more than two washers present. If more than two washers are present, you may need to replace the Spring to achieve the proper IP Value. 6. Remove the Piston assembly (18-3-20-17) from the First Stage Cap (19). 7. Remove the Plastic Seat (3) from the Piston (18) using the HP Seat removal Tool (B-22). 8. Remove the O-rings (20) and (17) from the Piston (18). 6 s 9. Disassemble the Lp plugs (6) and the HP plug (14) using a 4mm Allen Wrench. 10. Remove the O-rings (5) from the Lp plugs (6) and the O-ring (13) from the HP plug (14). 6 b 7 a 7 b

2017 - revised 2017 2S First Stage F3 2S. DISASSEMBLY INT (section 11) DIN (section 12)

2017 - revised 2017 2S First Stage F4 2S. DISASSEMBLY 11.1 Unscrew the Yoke Retainer Nut (23) using the special Tool 25mm (B1) and remove the Yoke Retainer assembly (23-12-8-2). 11.2 Disassemble the Retaining Ring (2) using the snap ring pliers (B14) and remove the Filter (8) and the Spring Filter (12). 11.3. Remove the O-ring (26) from the Yoke Retainer Nut (23). 11.1 a 11.1 b 2S. DISASSEMBLY DIN 11.2 a 12.1 Unscrew the O-ring Seat DIN (15) from the Body DIN Connector (24) with a 4 mm Allen wrench. 12.2 Remove the O-ring (25) from the O-ring Seat (15). 12.3 Remove the Sintered Filter (7) from the Body DIN Connector (24), by turning the First Stage over. 11.2 b 12.4 Insert a 5 mm Allen wrench (B4) inside the Body DIN Connector (24) and unscrew it completely. To make this step easier, a wrench (as shown in the picture) can help. 12.5 Remove the O-ring (26) from the Body Din Connector (24). 12.1 12.4

2017 - revised 2017 2S First Stage F5 2S. INSPECTION AND CLEANING Reusable Rubber and Plastic Components Inspection Inspect all reusable rubber and plastic components for excessive wear and/or damage. Replace parts as necessary. Cleaning Clean all rubber and plastic components by washing them in a mixture of warm water and mild detergent. If necessary, scrub parts with a soft brush. Do not use abrasive cleaners, solvents or acids on rubber components. CAUTION SOLVENTS AND ACIDS MAY DAMAGE PLASTIC AND RUBBER PARTS. BEFORE CLEANING METAL COMPONENTS, MAKE SURE THAT ALL RUBBER AND PLASTIC PARTS HAVE BEEN REMOVED. Metal Components Inspection Inspect all parts for excessive wear and/or damage. Replace parts as necessary. Cleaning Chrome plated, brass, and stainless steel parts are cleaned by immersing them in an ultrasonic cleaner containing a de-scaling agent such as Deox Extra or a solution of white vinegar diluted with hot water. A nylon brush may be used to remove any stubborn deposits. Be sure to rinse all parts in fresh water and allow to completely dry before proceeding with reassembly.

2017 - revised 2017 2S First Stage F6 2S. FIRST STAGE SERVICE KIT NUT YOKE RETAINER SPRING FILTER FILTER INT HP PLUG OR 108 LP PLUG OR 106 RETAINER RING PLASTIC SEAT OR 2018 1 ST BODY YOKE YOKE KNOB OR 2050 COVER 1 STAGE CAP OR 2100 PISTON SPRING POPPET 1 STAGE OR 3043 O-ring SEAT DIN FILTER DIN BODY DIN THREADED LOCK. RING Certain key components of the First Stage should be replaced during the overhaul. These key parts are included in the 2S First Stage Service Kit (Code 46201108 INT/DIN - 46201130 INT/DIN Viton) and are identified in the RED BOXES above. SERVICE KIT # 46201108 (INT/DIN)- 46201130 (INT/DIN) Viton

2017 - revised 2017 2S First Stage F7 2S. REASSEMBLY Lubrication reduces the likelihood of damage during reassembly. Before beginning the reassembly procedure, lightly lubricate all O-rings with Bluesil Vacuum GRS- Bluestar Silicones or Christo-Lube MCG 111 Lubrifi ation Technology or equal silicone grease. 14-15 13. Install the First Stage Disassembly Tool (B-5) into an LP port of the 1st Stage Body. For best results, place the threaded bar Tool (B5) in a bench vise to hold the First stage during the reasassembly. 16 14. Install a new Plastic Seat (3) on the Piston (18). 15. Place the O-rings (20) and (17) on the Piston (18). 16. Place the Piston assembly (18-3-20-17) into the First Stage Cap (19). If one Washer (27) is present, place it on the base of the Piston (18). 17. Slightly lubricate the base of the Spring (4), and place it on the Piston (18), inside the First Stage Cap (19). If the second Washer (27) is present, place it on top of the Spring (4). 17 CAUTION THE NUMBER OF WASHERS TO INCREASE IP IS LIMITED TO TWO (2) MAXIMUM (ONE BETWEEN THE PISTON AND SPRING AND ONE BETWEEN THE SPRING AND 1ST STAGE BODY). IF THE MAXIMUM NUMBER OF WASHER HAVE BEEN INSTALLED AND THE IP VALUE IS BELOW THE RECOMMENDED IP RANGE, THE 1ST STAGE SPRING MUST BE REPLACED. 18. Install the Cap First Stage (19) with all the components (18 3 20 17 27 4) assembled, on the First Stage Body (1), using the First Stage Cap Wrench (23). 19. Flip the First Stage over. 18

2017 - revised 2017 2S First Stage F8 2S. REASSEMBLY INT (section 20) DIN/Nitrox (section 21)

2017 - revised 2017 2S First Stage F9 2S. REASSEMBLY 20.1 Assemble the Filter Spring (12) and the Filter (8) in the Yoke Retainer Nut (23). 20.2 Using the retaining ring pliers (B14), press down to fit the Retaining Ring (2) above the Filter (8) in the Yoke Retainer Nut (23). 20.1 a The Retaining ring should be positioned with the sharp side up and rounded side down. Once installed, rotate the Retaining Ring to ensure it is correctly positioned. 20.3 Install the O-ring (26) on the Yoke Retainer Nut (23). 20.1 b 20.4 Install the Yoke Knob (22) on the Yoke (21). Place the Yoke (21+22) on the 1st Stage Body. 20.5 Using a 25mm wrench (B1), fully tighten the Yoke Retainer Nut (23). WARNING USE A TORQUE WRENCH TO TIGHTEN THE CWD DRY BODY (18), USE A TIGHTENING TORQUE OF 13-15 ft *lbf / 18-20 Nm 20.2 a DANGER TO PREVENT THE YOKE RETAINER NUT (7) FROM LOOSENING, APPLY ONE DROP OF THREAD LOCKING COMPOUND ONTO THE FIRST TWO THREADS PRIOR TO INSTALLATION. REMOVE ANY RESIDUAL THREAD LOCKING COMPOUND PRIOR TO APPLYING ANY NEW COMPOUND (LOCTITE 415 OR SIMILAR). 20.2 b 20.6 Install the O-ring (13) on the HP plug (14), and the O-rings (5) on the LP plugs (6). 20.3 20.7 Install all HP and LP plugs on the First Stage Body, leaving the DFC and one additional LP port open for the Second Stage and IP Gauge. 20.5

2017 - revised 2017 2S First Stage F10 2S. REASSEMBLY DIN 21.1 Insert the Body DIN Connector (24) into the Threaded Locking ring (11). 21.2 Position the O-ring (26) on the Body Din Connector (24). 21.3 Using a 5-mm Allen wrench (B 4), tighten the Body DIN Connector (24) to the First Stage Body. DANGER TO PREVENT THE BODY DIN CONNECTOR (24) FROM LOOSENING, APPLY ONE DROP OF THREAD LOCKING COMPOUND ONTO THE FIRST TWO THREADS PRIOR TO INSTALLATION. REMOVE ANY RESIDUAL THREAD LOCKING COMPOUND PRIOR TO APPLYING ANY NEW COMPOUND (LOCTITE 415 OR SIMILAR). 21.1-21.2 21.3 WARNING USE A TORQUE WRENCH TO TIGHTEN TO A TORQUE OF 15 ft*lbs / 20 Nm 21.4 Insert the Conical Filter (7) in the Body Din Connector (24). 21.5 Place the O-ring (25) on the Din O-ring Seat (15). 21.4 21.6 Using a 4mm Allen wrench, tighten the Din O-ring Seat (15) to the Body Din Connector (24). WARNING USE A TORQUE WRENCH TO TIGHTEN TO A TORQUE OF 1.1-1.5 ft*lbs / 1,5-2 Nm 21.5 21.7 Remove the Threaded Bar Tool (B-5) from the 1st Stage Body. 21.8 Install the O-ring (13) on the HP plugs (14), and the O-rings (5) on the LP plugs (6). 21.9 Install all HP and LP plugs on the First Stage Body, leaving the DFC and one additional LP port open for the Second Stage and IP Gauge. 21.6

2017 - revised 2017 2S First Stage F11 2S. ADJUSTMENT Connect the First Stage to a full tank (at least 2600 psi/180 bar) or test bench, and open the air valve slowly to expel any foreign matter from the First Stage. 22. Attach the intermediate pressure gauge (#46106252) or connect the LP hose from the LP port of a Test Bench to the open low pressure port. 23. Attach the Second Stage hose to the port marked DFC (without the Second Stage cover installed). IP WARNING USE A TORQUE WRENCH, TIGHTEN HOSES TO A TORQUE OF 3-3.5 ft*lbs / 4-4,5 Nm TABLE 1: IP ADJUSTABLE RANGE HP Air Supply Intermediate Pressure (IP) 2900 psi 142 152 psi 500 psi 142 152 +/- 7 psi HP 24. Holding down the Second Stage demand lever, slowly open the tank valve and, almost simultaneously, release the demand lever. Read the value of the First Stage adjustment on the pressure gauge, and proceed as follows: No Second Stage free or intermittent air fl w from the 2nd stage should occur during the IP adjustment procedure. If any such fl w occurs, it will compromise the procedure and could cause the IP setting to be outside the acceptable range.

2017 - revised 2017 2S First Stage F12 2S. ADJUSTMENT 25. If the First Stage intermediate pressure is greater than specified value (see table 1): 25.1 Disassemble the regulator from the tank and proceed as described in steps 1 to 6. 25.2 Remove one Plastic Washer (27). 25.3 Reassemble the regulator as described in steps 13 to 18. 25.4 Proceed as described in steps 23 and 24 to check the Intermediate pressure. If there are no Plastic Washers present, and the IP is above the acceptable range, the Spring must be replaced. CAUTION WHEN THE INTERMEDIATE PRESSURE IS REDUCED, IT IS NECESSARY TO VENT THE EXCESS AIR IN ORDER TO OBTAIN A CORRECT READING OF THE NEW VALUE. 26. If the First Stage intermediate pressure is lower than specified value (see table 1): 26.1 Disassemble the regulator from the tank and proceed as described in steps 1 to 6. 26.2 Add one or two Plastic Washers (27) as described in step 16 and 17. 26.3 Reassemble the regulator as described in step 13 to 18. 26.4 Proceed as described in steps 23 and 24 to check the Intermediate pressure. CAUTION IF THERE ARE NO PLASTIC WASHERS PRESENT, AND THE IP IS ABOVE THE ACCEPTABLE RANGE, THE SPRING MUST BE REPLACED. Once the intermediate pressure has been correctly set, operate the Second Stage demand lever two to three times to make sure the intermediate pressure remains constant for a few minutes. The Second Stage adjustment procedures may now be performed. 26. Install the Cover (9).

2017 - revised 2017 2S First Stage F13 2S. TROUBLESHOOTING Problem Probable Cause Solution 1. Intermediate Pressure too high Readjust IP per procedures CONTINUOUS AIR FLOW FROM SECOND STAGE (FREE FLOW) CAUSED BY: 1. AN INCREASE IN THE INTERMEDIATE PRESSURE, or 2. A CONTINUALLY INCREASING IP (IP CREEP) AIR LEAKS FROM FIRST STAGE DIAPHRAGM AIR LEAKS FROM THE FIRST STAGE HP/LP PORT PLUGS AND/OR HOSE PORTS AIR LEAKS BETWEEN YOKE AND TANK VALVE 2. Damaged First Stage Tri-material Poppet Replace Tri-material Poppet 2. Damaged Poppet Seat Replace Poppet Seat 2. Damaged HP Housing Assembly components or damaged HP Chanber Lose Locking Nut First Stage diaphragm damaged First Stage diaphragm seating surface damaged Damaged O-ring corrosion on metal surface Loose hose and/or port plug O-ring seal of tank valve corroded or damaged First stage Body (11) sealing surface damaged O-ring (71) damaged Check internal surfaces of HP Chamber. Clean or replace HP Chamber. Replace O-ring and/or Back Up Ring. Tighten CWD Kit Body Replace the diaphragm Replace the First Stage Body Clean the Seat and/or replace O-ring Tighten hose and/or plug Clean the Seat of the tank valve and replace the O-ring Replace First Stage Body (INT) Replace O-ring

2017 - revised 2017 2S First Stage F14 2S. DRAWING E 976 Updated: 04/03/2016

2017 - revised 2017 2S First Stage F15 2S. CHART 38 Updated: 10/01/2017 CHART NO: 38 1st STAGE R2S UPDATED: 10/01/2017 REF CODE DESCRIPTION REF CODE DESCRIPTION 1 C FIRST STAGE BODY 26 46110211 OR 2050 2 46185015 RETAINING RING, FIRST STAGE FILTER 27 46186221 PLASTIC RING, SPRING BASE 3 46201247 PLASTIC SEAT, PISTON 28 46200562 PROTECTION CAP DIN 4 46186220 SPRING POPPET FIRST STAGE 29 46200592 METAL THREADED LOCKING RING DIN NX 200 BAR 5 46110106 OR 106 30 46201239 BODY DIN CONNECTOR 52 300 BAR 6 46185204 LP PLUG 3/8", FIRST STAGE, REGS. 31 46110227 OR 3056 7 46200561 CONICAL FILTER, DIN 32 46200593 O-RING SEAT DIN NX 8 46186202 CONICAL FILTER, INT 33 46200658 YELLOW DUST CAP, NITROX 9 46201098 COVER 34 46201030 METAL THREADED LOCKING RING DIN 25 10 46185010 DUST CAP, INT 11 46200546 DIN 300 BAR THREADED LOCKING RING ASSEMBLIES 12 46185013 SPRING, FILTER 1ST C 416232 FIRST STAGE R2S ASSEMBLY (INT-DIN) 13 46110108 OR 108 F 416809 DIN CONNECTOR 300 BAR, R2S (7-9-11-15-24-25-26) 14 46185205 HP PLUG 7/16", FIRST STAGE --- 46201108 SERVICE KIT FIRST STAGE R2S INT/DIN 15 46200547 O-RING SEAT DIN 17 46110203 OR 2018 NITROX VERSION 18 46201095 PISTON FIRST STAGE N 46201443 NITROX CONNECTOR 200 BAR (EN13949) - NBR ORINGS 19 46201097 CAP FIRST STAGE --- 46201444 SERVICE KIT NX 1ST 52/22 (EN13949) - NBR ORINGS 20 46110224 OR 2100 21 46201074 YOKE 2k9 Parts highlighted in red are included in the service kits 46201108. 22 46184079 YOKE KNOB As far as the first stages made before X series (2015) are concerned, 23 46201100 NUT,YOKE RETAINER FIRST STAGE R2S you can get the codes of the Viton service kits, Nitrox connector (Viton) and Service kit NX (Viton) in the previous Spare Part catalogues (2015 24 46201102 BODY, DIN CONNECTOR 300 BAR and before) or in the Accessories 1 section of the present Spare Part 25 46110247 OR 3043 Catalogue.

2017 - revised 2017 2S First Stage F16 2S. DRAWING E 976 Updated: 04/03/2016

2017 - revised 2017 2S First Stage F17 2S. CHART 44 Updated: 10/01/2017 CHART NO: 44 1st STAGE R2S - XR UPDATED: 10/01/2017 REF CODE DESCRIPTION REF CODE DESCRIPTION 1 C FIRST STAGE BODY 25 46110247 OR 3043 2 46185015 RETAINING RING, FIRST STAGE FILTER 26 46110211 OR 2050 3 46201247 PLASTIC SEAT, PISTON 27 46186221 PLASTIC RING, SPRING BASE 4 46186220 SPRING POPPET FIRST STAGE 28 46200562 PROTECTION CAP DIN 5 46110106 OR 106 29 46200592 METAL THREADED LOCKING RING DIN NX 200 BAR 6 46185204 LP PLUG 3/8", FIRST STAGE, REGS. 30 46201239 BODY DIN CONNECTOR 52 300 BAR 7 46200561 CONICAL FILTER, DIN 31 46110227 OR 3056 8 46186202 CONICAL FILTER, INT 32 46200593 O-RING SEAT DIN NX 9 46201098 COVER 33 46200658 YELLOW DUST CAP, NITROX 9 46201500 COVER NX 34 46201030 METAL THREADED LOCKING RING DIN 25 10 46185010 DUST CAP, INT ASSEMBLIES 11 46200546 DIN 300 BAR THREADED LOCKING RING --- 46201108 SERVICE KIT FIRST STAGE R2S INT/DIN 12 46185013 SPRING, FILTER 1ST 13 46110108 OR 108 14 46185205 HP PLUG 7/16", FIRST STAGE 15 46200547 O-RING SEAT DIN NITROX VERSION 17 46110203 OR 2018 N 46201443 NITROX CONNECTOR 200 BAR (EN13949) - NBR ORINGS 18 46201095 PISTON FIRST STAGE --- 46201444 SERVICE KIT NX 1ST 52/22 (EN13949) - NBR ORINGS 19 46201097 CAP FIRST STAGE 20 46110224 OR 2100 Parts highlighted in red are included in the service kits 46201108 21 46201074 YOKE 2k9 As far as the first stages made before X series (2015) are concerned, 22 46184079 YOKE KNOB you can get the codes of the Viton service kits, Nitrox connector (Viton) and Service kit NX (Viton) in the previous Spare Part catalogues (2015 23 46201100 NUT,YOKE RETAINER FIRST STAGE R2S and before) or in the Accessories 1 section of the present Spare Part 24 46201102 BODY, DIN CONNECTOR 300 BAR Catalogue

ROVER SECOND STAGE ROVER SECOND STAGE

2017 - revised 2017 Technical Information ITM 23 ITM 23 INSERT DEMAND LEVER #46200992 JUL. 18, 2011 MARES S.p.A. TECHNICAL SUPPORT WISHES TO NOTIFY MARES LAB CENTERS AND TECHNICIANS OF A CHANGE MADE TO THE METAL INSERT DEMAND LEVER (# 46200774) USED IN PRESTIGE, PRESTIGE DPD, ROVER, AND CARBON SECOND STAGES. THE NEW VERSION MAKES THE SECOND STAGE LIGHTER WEIGHT AND DELIVERS IMPROVED BREATHING COMFORT. THE CHANGE MADE WAS TO THE OVERMOULDING OF THE NYLON INSERT, AND CAN BE IDENTIFIED BY THE BLACK COLOR AS SHOWN IN THE PHOTO FOUND IN THE TECHNICAL INFORMATION. THE NEW OVERMOULDED DEMAND LEVER WILL REPLACE THE PREVIOUS VERSION, WHICH WILL BE AVAILABLE WHILE SUPPLIES LAST AND CAN BE REQUESTED AS A SPARE PART USING CODE: #46200992. INITIALLY THE REGULATORS ON WHICH THE NEW INSERT DEMAND LEVER WILL BE ASSEMBLED CAN BE RECOGNIZED BY A SERIAL NUMBER AS SHOWN IN THE FOLLOWING TABLE: PRODUCT CODE DESCRIPTION SERIAL NUMBER 416182 PRESTIGE 12S DIN SM17670 416223 OCTOPUS PRESTIGE SMU STE 10419 416223 PRESTIGE 12S INT SMU STD 10419 416526 OCTOPUS PRESTIGE PO 34301 416220 ROVER 2S INT RS 12344 416505 ROVER OCTOPUS RH 35320 2 STAGE DEMAND LEVER INSERT # 46200774 # 46200992 WARNING! MAINTENANCE OPERATIONS MUST BE PERFORMED BY QUALIFIED PERSONNEL AT A MARES TECHNICAL ASSISTANCE CENTER AND/OR AUTHORIZED MARES DISTRIBUTOR. IN ORDER TO DISASSEMBLE AND REASSEMBLE THE SEAT FROM THE FIRST STAGE, IT IS NECESSARY TO CONSULT THE PROCEDURES DESCRIBED IN THE CORRESPONDING SECTION OF THE MAINTENANCE MANUAL (S-11). IF THE UPDATED MANUAL CONTAINING THESE SECTIONS IS NOT AVAILABLE AND/OR IF THE INSTRUCTIONS ARE NOT CLEAR OR FULLY UNDERSTANDABLE, PLEASE CONTACT MARES S.p.A. TECHNICAL SUPPORT BEFORE PERFORMING ANY MAINTENANCE, ADJUSTMENT, OR INSPECTION OPERATIONS.

2017 - revised 2017 Technical Information ITM 33 ITM 33 INSERT DEMAND LEVER #46200992 NOV. 05, 2013 TECHNICAL ASSISTANCE DEPT. WISH TO INFORM THAT, AFTER RECEIVING SOME CLAIMS FROM THE MARKET ABOUT BLACK SPOTS ON ROVER & ROVER OCTOPUS COVERS AND/ORA FEW CRACKS DUE TO PARTICULAR CONDITION OF USE AND/OR STORAGE, WE TESTED AND APPROVED A NEW MATERIAL IN ORDER TO AVOID THESE ISSUES. THE NEW COVERS ARE NOW AVAILABLE AND CAN BE ORDERED AS SPARE PARTS, USING THE FOLLOWING CODES THAT REPLACE THE PREVIOUS ONES 46201250: Rover Cover Second stage Black 46201251: Rover Cover Octopus Yellow 46201252: Rover Cover Nitrox Green IN ADDITION, YOU CAN ALSO EASILY IDENTIFY THE VERSIONS WITH NEW MATERIAL, THANKS TO 3 SMALL LINES, AS SHOWED IN THE PICTURE: - NEW ROVER COVER - WARNING! MAINTENANCE OPERATIONS MUST BE PERFORMED BY QUALIFIED PERSONNEL AT A MARES TECHNICAL ASSISTANCE CENTER AND/OR AUTHORIZED MARES DISTRIBUTOR. IN ORDER TO DISASSEMBLE AND REASSEMBLE THE SEAT FROM THE FIRST STAGE, IT IS NECESSARY TO CONSULT THE PROCEDURES DESCRIBED IN THE CORRESPONDING SECTION OF THE MAINTENANCE MANUAL (S-11). IF THE UPDATED MANUAL CONTAINING THESE SECTIONS IS NOT AVAILABLE AND/OR IF THE INSTRUCTIONS ARE NOT CLEAR OR FULLY UNDERSTANDABLE, PLEASE CONTACT MARES S.p.A. TECHNICAL SUPPORT BEFORE PERFORMING ANY MAINTENANCE, ADJUSTMENT, OR INSPECTION OPERATIONS

2017 - revised 2017 Rover Second Stage S1 ROVER. REQUIRED TOOLS AND SUPPLIES Tool Description #Code Tool Description #Code B-21 46106221 B-18 (14mm) 46106218 B-22 46106222 B-4 (5mm) 46106204 Hex 4mm No code B-12 46106212 B-6 46106206 B-8 (6mm) 46106208 B-17 (17mm) 46106217 O-Ring removal Tool 46201387 Compressed air diver grade supply circuit or tank (2600-2900 PSI/ 185-200 bar) Compressed air gun (120-145 PSI/8-10 bar) Ultrasonic cleaner & Descaling solution (e.g. Deox Extra type) or similar Magnehelic gauge (#416923 - #416924) Silicone grease (Bluesil Vacuum GRS- Bluestar Silicones or Christo-Lube MCG 111 Lubrification Technology or equal) Neoprene Workpad (449822) Second Stage service kit # 46200296 - # 46200297 Viton Nylon brush Phillips screwdriver (Usag 326 PH 0) or similar Nippers Torque Wrench

2017 - revised 2017 Rover Second Stage S2 ROVER. DISASSEMBLY 1. Remove the Dust Cap and move the hose cover from the 1st stage. Unscrew the hose (26) using a 14-mm open end wrench (B18). 2. Using cutting nippers (or pliers), cut the Mouthpiece Clamp (43) and remove the Mouthpiece (44). CAUTION TAKE SPECIAL CARE TO AVOID BREAKING THE MOUTHPIECE. 5 3. Remove the Exhaust Plug pin (174) and the Inspection Plug (41) using the B-22 tool. 4. Remove the Hose Protector (46) from the Second stage. 7a 5. Using two 17mm open end wrenches (B-17), remove the Hose (26) from the Second Stage Hose Connector (28). 6. Remove the O-rings (27 and 19) from each end of the Hose (26). 7. Remove the Pin Cover (63). 8. Unscrew the Cover (101). 7b 9. Remove the Diaphragm Retaining Ring (78) and the Diaphragm (36) from the Second Stage Case (32). 10. Unscrew the Hose Connector (28) using a 17-mm open end wrench (B-17), and pull out the By-pass Retainer Ring (96). 11. Gently press the Demand Lever Connector assembly into the case and remove the O-Ring (83) from its seat in the Second stage Case (32). 8a 8b 10 11

2017 - revised 2017 Rover Second Stage S3 ROVER. DISASSEMBLY 12. Position the demand Lever Insert assembly on the special tool (B-6) and use the special 5.5mm wrench (B-12) to unscrew the Locknut (33) from the Demand Lever (35). Press down the Insert (91) to put pressure on the Poppet Spring (31) and relieve the tension on the Demand Lever Locknut (33). While continuing to press down, use the special 5.5mm wrench (B-12) to remove the Locknut (33); then remove the Washer (34), and the Demand Lever (35). B - 12 13. Remove the Poppet assembly (30+47+92), and the Spring (31). After removing locknut, washer, and demand lever, slowly release the pressure on the poppet spring while covering it with your hand. This will prevent an uncontrolled exit by the spring from the second stage case. 14. Remove the Exhaust Valve (40). 15. Remove the Rubber Seat (47), by gently pressing down the Valve Body (92) towards the threaded stem. 16. Disassemble the Valve Body (92) from the stem of the Second stage valve shaft (30). 17. Unscrew the Poppet Seat (21) from the Hose Connector (28) using a 5-mm hex wrench (B-4). After 5 turns back, gently press the Poppet Seat (21) with the plastic end of tool (B-42) to dislodge and remove it. 12 13 B -6 CAUTION DO NOT USE SHARP OR POINTED TOOLS TO EXTRACT THE POPPET SEAT. SCRATCHES ON THE SEAT SURFACE MAY CAUSE AIR LEAKS. 15 17

2017 - revised 2017 Rover Second Stage S4 ROVER. DISASSEMBLY 18. Remove the O-Ring (71) from the hose connector (28) and the O-Ring (27) from the seat connector (21). 19. Unscrew the Second stage adj plug (64) using a 6-mm hex wrench (B-8) and remove the O-Rings (83). ROVER. INSPECTION AND CLEANING 18a Reusable Rubber and Plastic Components Inspection Inspect all reusable rubber and plastic components for excessive wear and/or damage. Replace parts as necessary. Cleaning Clean all rubber and plastic components by washing them in a mixture of warm water and mild detergent. If necessary, scrub parts with a soft brush. Do not use abrasive cleaners, solvents or acids on rubber components. 18b CAUTION SOLVENTS AND ACIDS MAY DAMAGE PLASTIC AND RUBBER PARTS. BEFORE CLEANING METAL COMPONENTS, MAKE SURE THAT ALL RUBBER AND PLASTIC PARTS HAVE BEEN REMOVED. 19 Metal Components Inspection Inspect all parts for excessive wear and/or damage. Replace parts as necessary. Cleaning Chrome plated, brass, and stainless steel parts are cleaned by immersing them in an ultrasonic cleaner containing a de-scaling agent such as Deox Extra or a solution of white vinegar diluted with hot water. A nylon brush may be used to remove any stubborn deposits. Be sure to rinse all parts in fresh water and allow to completely dry before proceeding with reassembly.

2017 - revised 2017 Rover Second Stage S5 ROVER. SECOND STAGE SERVICE KIT Some key components of the Second Stage should be replaced during the overhaul. These key parts are included in the Prestige/Rover Second Stage Service Kit (Code 46200296) and are identified in the RED BOXES below. SERVICE KIT # 46200296

2017 - revised 2017 Rover Second Stage S6 ROVER. REASSEMBLY Lubrication reduces the likelihood of damage during reassembly. Before beginning the reassembly procedure, lightly lubricate all O-rings with Bluesil Vacuum GRS- Bluestar Silicones or Christo-Lube MCG 111 Lubrifi ation Technology or equal. 20 20. Carefully install a new Exhaust Valve (40) by gently pulling the silicone valve stem through the hole of the Second Stage exhaust valve opening. CAUTION IN ORDER TO AVOID DAMAGING THE EXHAUST VALVE, DO NOT PULL THE STEM TOO HARD. 21 21. Use cutting nippers to cut the end section of the Exhaust Valve (40) stem at approximately half it s length. 22. Reassemble the Poppet Body (92) on the Second Stage poppet stem (30). 23. Reassemble the Poppet Seat (47) in the Poppet Body (92). 24. Place the Second stage Poppet assembly (30-47-92) together with its spring (31) on the special tool (B-6). 22-23 24

2017 - revised 2017 Rover Second Stage S7 ROVER. REASSEMBLY 25. Correctly position the Second Stage valve and its spring into the demand lever insert (91) and hold it in place, by gently press it. To be sure that the Second Stage Poppet stem is correctly positioned into the demand lever connector hole, gently rotate the connector left and right on the B-6 tool. 26. Properly position the Demand Lever (35) in the groove of the demand lever insert (91) as shown in the pic 26. 27. Place the Washer (34) on the poppet stem and tighten the demand lever adjusting nut (33) 7 or 8 full turns using the special wrench (B-20). CAUTION DEMAND LEVER (35) HEIGHT ADJUSTMENT REQUIRES THE USE OF SPECIAL TOOL B-12 (TYPE BETA 942BX5.5) OR A WRENCH WITH A HEAD DIAMETER OF NO MORE THAN 8.2 MM /0.32 INCH. B - 20 26 Press the Demand Lever a few times to be sure it is able to move freely. CAUTION DO NOT OVER-TIGHTEN THE DEMAND LEVER LOCKNUT (33). DOING SO MAY RESULT IN A SECOND STAGE FREE FLOW, WHICH CAN INTERFERE WITH THE INTERMEDIATE PRESSURE ADJUSTMENT PROCEDURE. 27a 27b

2017 - revised 2017 Rover Second Stage S8 ROVER. REASSEMBLY 28. Install the O-Ring (71) in the seat of the Hose Connector (28) and the O-ring (27) in the seat of the Poppet Seat (21). 29. Using the 5mm hex wrench (B-4), screw the Poppet Seat (21) all the way into the Hose Connector (14) until it stops (Do not over tighten). Loosen (turn counter clockwise) the Poppet Seat 4 1/2 turns (main Second Stage) or until it extends about 2.5 mm from the hose connector (28). Loosen (turn counter clockwise) the Poppet Seat 4 turns (main Second Stage) or until it extends about 3mm (Octopus version) 28 CAUTION THE POPPET SEAT SETTING DESCRIBED IN STEP 29 IS AN INITIAL ADJUSTMENT ONLY, AND SHOULD BE RESET IF IT IS DETERMINED THE CRACKING EFFORT IS NOT WITHIN THE ACCEPTABLE RANGE. 30. Correctly place the Demand Lever insert assembly (91) in the Second Stage Case (32). 31. Hold the Demand Lever Insert in place into the Second Stage Case (32) with the B-20 Tool, install the O-Ring (83) into the seat between the Second Stage Case and the Demand Lever Insert, using the special Tool (B-6). 29 30 31a 31b

2017 - revised 2017 Rover Second Stage S9 ROVER. REASSEMBLY 32. Put the Spacer Ring (96) in place, and use the 17-mm open-end wrench (B-17) to tighten the Hose Connector (28) in the Second Stage Case. Press the demand lever few times. Place a small amount of silicone grease on the threads of the O-ring side of the Hose Connector (28). WARNING USE A TORQUE WRENCH TO TIGHTEN THE RETAINING NUT (17), USE A TIGHTENING TORQUE OF 6 ft*lbf / 8 Nm. 32 a 33. Install the O-ring (27) in the Second Stage end of the LP Hose (26) and the O-Ring (19) in the 1st Stage end of the Hose. 34. Using two wrenches (B-17), connect the Hose (26) to the Hose Connector (28). DANGER MAKE SURE THE HOSE CONNECTOR IS SECURELY TIGHTENED BEFORE CONNECTING THE HOSE PROTECTOR TO THE ADJUSTABLE VAD KNOB. FAILURE TO DO SO, MAY RESULT IN THE HOSE CONNECTOR DISCONNECTING FROM THE SECOND STAGE CASE DURING USE. 32 b 35. Connect the LP Hose (26) with the Second Stage attached (without the Second Stage cover installed) to the 1st Stage LP Port marked DFC. WARNING! IF USING A TORQUE WRENCH TO TIGHTEN THE LP HOSE, USE A TIGHTENING TORQUE OF 3-3.5 ft*lbf / 4-4,5 Nm. 34 CAUTION AT THIS POINT, CONNECT THE SECOND STAGE TO THE FIRST STAGE AND SET THE FIRST STAGE INTERMEDIATE PRESSURE AS DESCRIBED IN THE FIRST STAGE SERVICE MANUAL.

2017 - revised 2017 Rover Second Stage S10 ROVER. REASSEMBLY 36. Insert the Diaphragm (36) into the Second Stage Case with the Diaphragm Ring (78) already assembly, and the Metal Disk in contact with the Demand Lever. Place the Diaphragm Ring (78) with the plastic teeth facing up. 36a 37. Place and tighten the Second Stage cover (101) on the Second Stage case (32). Align the Pin Cover seat of the Second Stage cover(101) with the Pin Cover seat of the Second Stage case (32). 36b 37a 37b

2017 - revised 2017 Rover Second Stage S11 ROVER. REASSEMBLY 38. Insert the Safety Clip (63). Then lock down the clip all the way down to the cover. CAUTION ALL THE ADJUSTMENTS BELOW MUST BE MADE WITH THE SECOND STAGE CONSISTENTLY SUPPLIED WITH THE CORRECT INTERMEDIATE PRESSURE (IP). 38 39. Insert the B12 wrench through the adjusting hole in the Second Stage Case and secure it to the Demand Lever Locknut. Tighten or loosen the Demand Lever locknut (32) to properly adjust the Demand Lever (35). 39 CAUTION THE DEMAND LEVER IS ADJUSTED CORRECTLY WHEN THE LEVER IS SLIGHTLY LOOSE, AND AIR BEGINS TO FLOW WHEN THE PURGE BUTTON IS DEPRESSED ABOUT 2MM. A TAPPING SOUND OF THE DEMAND LEVER TOUCHING THE METAL DISK OF THE SECOND STAGE DIAPHRAGM SHOULD BE AUDIBLE WHEN THE PRESSURIZED SECOND STAGE IS SHAKEN VIGOROUSLY UP AND DOWN. 40. Press the purge button few times, and then install the O-Ring (83) on the Second Stage ADJ plug (64). 41. Use the hex wrench (B-8) to fully tighten the Second Stage ADJ Plug (64) assembly in the Second Stage Case (32).

2017 - revised 2017 Rover Second Stage S12 ROVER. ADJUSTMENT 42. Recheck the Intermediate Pressure (9.8-10.2 bar/ 142-148 psi). 43. Attach the Second Stage to a Magnehelic gauge. 44. Measure the Second Stage Cracking Effort. CAUTION THE CRACKING EFFORT MUST BE READ THE MOMENT THE INTERMEDIATE PRESSURE STARTS TO DECREASE. MAGNEHELIC GAUGE Magnehelic gauge Inches Magnehelic gauge cm Rover 3.3-3.8 1.3-1.5 Rover Oct. 3.5 4.1 1.4-1.6 45. If the Cracking Effort is outside of the acceptable range, proceed as described below: 45.1 Move the Second Stage side hose protector (46). Using two wrenches (B-17), unscrew the hose (26) from the connection (28). 45.2 If the Cracking Effort value is lower than the acceptable range, screw in the Poppet Seat (21), a ¼ turn at the time till the value is correct. 45.3 If the Cracking Effort value is higher than the acceptable range, unscrew the Poppet Seat (21), a ¼ turn at the time till the value is correct.

2017 - revised 2017 Rover Second Stage S13 ROVER. ADJUSTMENT 45.4 Using two wrenches (B-17), connect the LP Hose (26) to the Hose Connector (28). 45.5 Put the hose protector (46) in place. 45.6 Measure the Second Stage Cracking Effort. Follow the steps described above until the acceptable cracking effort value is reached. 46. Shut off the HP air supply and purge all residual air. 47. Inhale directly from the Second Stage Mouthpiece in order to detect any air leakeage from inside of the Case. ROVER. REASSEMBLY 48. Assemble the Inspection Plug (41) on the second stage, and secure it with the Exhaust Plug pin (174). 49. Carefully assemble the Mouthpiece (44), securing it with a new Mouthpiece Clamp (43).

2017 - revised 2017 Rover Second Stage S14 ROVER. TROUBLESHOOTING Problem Probable Cause Solution Continuous or intermittent air flow from the Second Stage Cracking Pressure higher than acceptable range Rubber Seat (47) Damaged Sealing surface of the Poppet Seat (21) is dirty or damaged IP exceeds acceptable range Demand Lever set too high Poppet Spring (31) out of position or damaged Incorrect Poppet Seat (21) adjustment (too low) Demand Lever set too low IP outside of acceptable range Tank valve not fully opened Second Stage Poppet Spring deformed or damaged First Stage filter clogged Incorrect Poppet Seat (21) adjustment (too high) High Poppet Spring tension Replace Rubber Seat Clean or replace Poppet Seat Adjust IP to (9.8 10.2 bar) (142 148 psi) Or Cold Water Kit (8.7 9.4 bar) (127 136 psi) Adjust to correct height Position correctly or replace Adjust to 4 ½ Turns/2,5mm Adjust to correct height Adjust IP to (142 148) Or Cold Water Kit (127 136) Completely open the tank valve Replace Poppet Spring Overhaul First Stage and replace filter Adjust to 4 ½ Turns/2,5mm Replace Poppet Spring

2017 - revised 2017 Rover Second Stage S15 ROVER. TROUBLESHOOTING Problem Probable Cause Solution Cracking Pressure lower than acceptable range Traces of water inside Second Stage Vibration sound from Second Stage during inhalation IP outside of acceptable range Second Stage Poppet Spring deformed or damaged Demand Lever set too high Incorrect Poppet Seat (21) adjustment (too low) Ring Clamp (37) loose or damaged Exhaust Valve support dirty Exhaust Valve (40) damaged Diaphragm (36) dirty, damaged, or incorectly positioned Mouthpiece (44) loose or damaged Diaphragm (36) incorrectly positioned Incorrect Demand lever adjustment Poppet Spring (31) damaged or incorreclty positioned Adjust IP to (9.8 10.2 bar) (142 148 psi) Or Cold Water Kit (8.7 9.4 bar) (127 136 psi) Replace Poppet Spring Adjust to correct height Adjust to 4 ½ Turns/2,5mm Tighten or replace Clean support Replace Exhaust Valve Clean, position correctly or replace Replace the clamp; replace mouthpiece Check and position correctly Check and adjust correctly Check and Position correctly or replace

2017 - revised 2017 Rover Second Stage S16 ROVER. DRAWING E 38 Updated: 12/12/2008

2017 - revised 2017 Rover Second Stage S17 ROVER. CHART 128 Updated: 10/01/2017 CHART NO: 128 SECOND STAGE OCTOPUS ROVER UPDATED: 10/01/2017 REF CODE DESCRIPTION REF CODE DESCRIPTION 19 46110106 OR 106 71 46110211 OR 2050 21 46200204 POPPET SEAT 78 46200773 DIAPHRAGM RING PRESTIGE 26 46201382 LP HOSE 3/8 black 80 cm WO/HOSE PROTECTOR 83 46110225 OR 2068 26 46201383 LP HOSE 3/8 yellow 100 cm WO/HOSE PROTECTOR 91 46200992 INSERT FOR DEMAND LEVER 27 46110205 OR 2025 92 46184221 VALVE BODY, SECOND STAGE 28 46184282 HOSE CONNECTOR 96 46200779 SPACER RING BY-PASS BK 30 46184219 POPPET METAL BODY REGS 96 46200782 SPACER RING BY-PASS YL 31 46201404 SPRING SECOND STAGE 101 46201250 COVER 2 nd STAGE Rover BLACK 32 46200858 SECOND STAGE CASE 101 46201251 COVER OCTOPUS Rover 33 46185051 LOCKNUT, DEMAND LEVER 101 46201252 COVER NITROX Rover 34 46185049 WASHER, DEMAND LEVER 174 46200361 EXHAUST PLUG PIN 35 46200778 DEMAND LEVER 36 46201364 DIAPHRAGM BLACK ASSEMBLIES 40 46184006 EXHAUST VALVE, SECOND STAGE --- 46200855 10 PACK BLACK MOUTHPIECES 41 46200769 INSPECTION PLUG --- 46200296 SERVICE KIT ROVER/PRESTIGE/CARBON/CR 43 47157984 CLAMP --- 46200510 KIT RETROFIT (21-27-47) 44 --- SEE CATALOGUE 45 46201249 HOSE PROTECTOR 46 46201473 HOSE PROTECTOR SECOND STAGE 47 46184062 RUBBER SEAT SECOND STAGE Parts highlighted in red are included in the service kits 46200296 63 46184289 PIN-COVER Service kit (Viton) is available in the Accessori 1 section until the stocks 64 46200772 SECOND STAGE. ADJUSTMENT PLUG ends; it will be replaced by the Service kit with NBR O-rings

OCTOPUS MV OCTOPUS MV

2017 - revised 2017 Technical Bulletin BTM 20 BTM 20 OCTOPUS MV COVER JAN. 10, 2011 HAVING RECEIVED A NUMBER OF REPORTS, MARES SPA TECHNICAL SUPPORT REQUESTS THAT ALL MARES LAB PARTNERS, WHEN CARRYING OUT PERIODIC INSPECTIONS, CHECK FOR THE PRESENCE OF SMALL HOLES IN THE OVAL MEMBRANE OF THE SECOND STAGE (CODE: 46187009) AROUND THE METAL DISK (PHOTO 1). IF ANY HOLES ARE DISCOVERED THE OVAL MEMBRANE MUST BE REPLACED AND YOU MUST CHECK THE SURFACE OF THE PURGE BUTTON POPPET (CODE: 46187028) (PHOTO 2) TO CHECK FOR ANY RESIDUAL MATERIAL (PHOTO 3); IF SO REMOVE (PHOTO 4) USING A CUTTER FOR EXAMPLE, IN ORDER TO AVOID THE PROBLEM RETURNING WHEN REPLACING THE MEMBRANE. MARES SPA ALSO RECOMMENDS CHECKING ANY STOCK OF MV COVERS KEPT AS SPARE PARTS AND THEN REMOVE THE PLASTIC RIDGE IF NEEDED. PHOTO 1 PHOTO 2 PHOTO 3 PHOTO 4 WARNING THE OPERATIONS DESCRIBED MUST BE CARRIED OUT BY QUALIFIED PERSONNEL AT A TECHNICAL SUPPORT CENTRE AND/OR AUTHORISED MARES LAB DISTRIBUTOR.IN THE ABSENCE OF AN UP-TO-DATE MAINTENANCE MANUAL, PLEASE CONTACT MARES TECHNICAL SUPPORT BEFORE CARRYING OUT ANY MAINTENANCE AND/OR REPAIR, ADJUSTMENT AND INSPECTION.

2017 - revised 2017 Technical Information ITM 27 ITM 27 MV EXHAUST VALVE # 46201219 NOV. 28, 2012 MARES S.p.A. TECHNICAL SUPPORT WISHES TO INFORM ALL MARES LAB CENTERS AND TECHNICIANS THAT THE FOLLOWING CHANGES WILL BE MADE TO THE MV SECOND STAGE/OCTOPUS CODE (416523): 1. NEW EXHAUST VALVE # 46201219 (PHOTO 1 REF. A) 2. NEW EXHAUST TEE (# 46201220) (PHOTO 2 REF. B) THE NEW EXHAUST VALVE IS SLIGHTLY HARDER THAN THE PREVIOUS VERSION (#46184006), THEREBY ENSURING A PERFECT SEAL EVEN WHEN THERE IS A CURRENT. IT WILL BE ASSEMBLED BEGINNING WITH THE SERIAL NUMBERS INDICATED BELOW, AND WILL BE EASILY DISTINGUISHABLE FROM THE PREVIOUS VERSION BY THE NEW COLOR (GREY) (PHOTO 1, REF. A). THANKS TO ITS NEW STREAMLINED SHAPE, THE NEW EXHAUST TEE AND THE INTERNAL BAFFLES (PHOTO 2 REF. B) IMPROVE BOTH APPEARANCE AND PERFORMANCE DURING THE EXHALE (AIR RELEASE). THE NEW TEE WILL BE ASSEMBLED WITH THE IN-LINE EXCHANGE SYSTEM AS SOON AS STOCK OF THE PREVIOUS VERSION IS EXHAUSTED (PHOTO 2 REF. A). THE REGULATORS ON WHICH THE NEW EXHAUST VALVE AND NEW TEE ARE ASSEMBLED CAN BE RECOGNIZED BY SERIAL NUMBER, AS SHOWN IN THE TABLE BELOW: PRODUCT CODE DESCRIPTION SERIAL NUMBER 416523 MV OCTOPUS BMD10001 WARNING MAINTENANCE OPERATIONS MUST BE PERFORMED BY QUALIFIED PERSONNEL AT A MARES TECHNICAL ASSISTANCE CENTER AND/OR AUTHORIZED MARES DISTRIBUTOR. IN ORDER TO DISASSEMBLE AND REASSEMBLE THE SEAT FROM THE FIRST STAGE, IT IS NECESSARY TO CONSULT THE PROCEDURES DESCRIBED IN THE CORRESPONDING SECTION OF THE MAINTENANCE MANUAL (S-11). IF THE UPDATED MANUAL CONTAINING THE REQUIRED SECTIONS IS NOT AVAILABLE AND/OR IF THE INSTRUCTIONS ARE NOT ENTIRELY CLEAR OR NOT FULLY COMPREHENSIBLE, PLEASE CONTACT THE MARES S.p.A. TECHNICAL SUPPORT SERVICE BEFORE CONDUCTING ANY MAINTENANCE, ADJUSTMENT, OR CONTROL OPERATIONS.

2017 - revised 2017 Octopus MV S1 MV. REQUIRED TOOLS AND SUPPLIES Tool Description #Code Tool Description #Code B-22 46106222 B-18 (14mm) 46106218 Hex 4mm No code B-4 (5mm) 46106204 B-6 46106206 Pliers (type Usag 133) B-17 (17mm) 46106217 B-12 46106212 O-ring removal Tool 46201387 Compressed air diver grade supply circuit or tank (2600-2900 PSI/ 185-200 bar) Compressed air gun (120-145 PSI/8-10 bar) Ultrasonic cleaner & Descaling solution (e.g. Deox Extra type) or similar Magnehelic gauge (#416923 - #416924) Silicone grease (Bluesil Vacuum GRS- Bluestar Silicones or Christo-Lube MCG 111 Lubrification Technology or equal) Neoprene Workpad (449822) Second Stage service kit #46187222 - #46187223 Viton Nylon brush Phillips screwdriver (Usag 326 PH 0) or similar Nippers Torque Wrench

2017 - revised 2017 Octopus MV S2 MV. DISASSEMBLY 1. Remove the Hose Protector (46) from the Second Stage and using two wrenches (B-17), unscrew the Hose (26) from the Hose Connector (28). 2. Remove the O-rings (27 and 19) from each end of the Hose (26). 3. Using cutting nippers (or pliers), cut the Mouthpiece Clamp (43) and remove the Mouthpiece (44). 1 CAUTION TAKE SPECIAL CARE TO AVOID DAMAGE TO THE MOUTHPIECE. 4. Use a small Phillips head screwdriver to unscrew the three Screws (140) that fasten the Cover (141). 5. Remove the Cover (141) and the Oval Diaphragm (142). We suggest you do not remove the screws (140), Metal washers (152) and Plastic Washers (151) from Cover (141). 4-5 6. Unscrew the Hose Connector (28) using a 17-mm open end wrench (B-17), and then pull out the Lock Ring (96). 7. Gently press the Demand Lever Insert assembly (91) into the case and remove the O-Ring (83) from the Second Stage Case (32) using special Tool B-6 as shown. 6 B - 6 7

2017 - revised 2017 Octopus MV S3 MV. DISASSEMBLY 8. Position the Demand Lever insert assembly (91) on the special Tool (B-6) and use the special 5.5mm wrench (B-12) to unscrew the Locknut (33) from the Demand Lever (35). Press down the Insert (91) to put pressure on the Poppet Spring (31) and relieve the tension on the Demand Lever Locknut (33). While continuing to press down, use the special 5.5mm wrench (B-12) to remove the Locknut (33); then remove the Washer (34), and the Demand Lever (35). B - 12 9. Remove the Rubber Seat (47), by gently pressing down the Valve Body (92) towards threaded stem. 10. Disassemble the Poppet Seat Holder (92) from the stem of the Second Stage Valve Shaft (30). 11. Unscrew the Poppet Seat (21) from the Hose Connector (28) using a 5-mm hex wrench (B-4). After 5 turns back, gently press the Poppet Seat (21) with the plastic end of Tool (B-42) to dislodge and remove it. B - 6 8 CAUTION DO NOT USE SHARP OR POINTED TOOLS TO EXTRACT THE POPPET SEAT. SCRATCHES ON THE SEAT SURFACE MAY CAUSE AIR LEAKS. 9 11

2017 - revised 2017 Octopus MV S4 MV. DISASSEMBLY 12. Gently press the pins of the Exhaust Valve Grid (145), using a special Tool B-22, and remove it. B - 22 13. Gently pressing from the inside of the Second Stage Case (32),remove the Exhaust Valve Holder assembly (144). 14. Remove the Exhaust Valve (40) and the O-ring (143) from the Exhaust Valve Holder (144). MV. INSPECTION AND CLEANING Reusable Rubber and Plastic Components 12 Inspection Inspect all reusable rubber and plastic components for excessive wear and/or damage. Replace parts as necessary. Cleaning Clean all rubber and plastic components by washing them in a mixture of warm water and mild detergent. If necessary, scrub parts with a soft brush. Do not use abrasive cleaners, solvents or acids on rubber components. 13 CAUTION SOLVENTS AND ACIDS MAY DAMAGE PLASTIC AND RUBBER PARTS. BEFORE CLEANING METAL COMPONENTS, MAKE SURE THAT ALL RUBBER AND PLASTIC PARTS HAVE BEEN REMOVED. Metal Components Inspection Inspect all parts for excessive wear and/or damage. Replace parts as necessary. Cleaning Chrome plated, brass, and stainless steel parts are cleaned by immersing them in an ultrasonic cleaner containing a de-scaling agent such as Deox Extra or a solution of white vinegar diluted with hot water. A nylon brush may be used to remove any stubborn deposits. Be sure to rinse all parts in fresh water and allow to completely dry before proceeding with reassembly.

2017 - revised 2017 Octopus MV S5 MV. SECOND STAGE SERVICE KIT MOUTHPIECE VALVE BODY SPRING DEMAND LEVER 2 STAGE INSERT WASHER PLASTIC CLAMP RUBBER PAD POPPET BODY HOSE CONNECT. LEVER LOCKNUT 2 STAGE CASE EXHAUST VALVE SEAT POPPET SEAT OR 2025 OR 2050 LOCK RING OR 2068 OR 2025 OR 106 SCREW COVER NBS SPRING DIAPHRAGM OR 2068 EXHAUST VALVE LP HOSE WASHER COVER PLASTIC WASHER STICKER COVER EX. VALVE GRID Some key components of the Second Stage should be replaced at each scheduled overhaul. These key parts are included in the MV second Stage Service Kit (# 46187222) and are identified in the RED BOXES below. SERVICE KIT # 46187222

2017 - revised 2017 Octopus MV S6 MV. REASSEMBLY Lubrication reduces the likelihood of damage during reassembly. Before beginning the reassembly procedure, lightly lubricate all O-rings with Bluesil Vacuum GRS- Bluestar Silicones or Christo-Lube MCG 111 Lubrifi ation Technology or equal. 15. Reassemble the Valve Body (92) on the Second Stage Poppet Stem (30). 16. Reassemble the Rubber Pad (47) in the Valve Body (92). 17. Place the Second Stage Poppet assembly (30-47-92) together with its spring (31) on the special Tool (B-6). 18. Pressing gently, correctly position the Second Stage Valve and its spring into the Demand Lever Connector (91) and hold it in place. To be sure that the Second Stage Poppet Stem is correctly positioned into the Demand Lever Connector hole, gently rotate the Connector left and right on the B-6 Tool. 15-16 19. Properly position the Demand Lever (35) in the groove of the Demand Lever Insert (91) as shown in the pic 16. 20. Place the Washer (34) on the Poppet Stem and tighten the Demand Lever Locknut (33) 7 or 8 full turns using the special wrench (B-20). CAUTION DEMAND LEVER (35) HEIGHT ADJUSTMENT REQUIRES THE USE OF SPECIAL TOOL B-12 (TYPE BETA 942BX5.5) OR A WRENCH WITH A HEAD DIAMETER OF NO MORE THAN 8.2 MM /0.32 INCH B - 6 17 Press the demand lever a few times to be sure it is able to move freely CAUTION DO NOT OVER-TIGHTEN THE DEMAND LEVER LOCKNUT (33). DOING SO MAY RESULT IN A SECOND STAGE FREE FLOW, WHICH CAN INTERFERE WITH THE INTERMEDIATE PRESSURE ADJUSTMENT PROCEDURE. 20

2017 - revised 2017 Octopus MV S7 MV. REASSEMBLY 21. Install the O-Ring (71) on the Hose Connector (28) and the O-ring (27) on the Seat Connector (21). 22. Using the 5mm hex wrench (B-4), screw the Poppet Seat (21) all the way into the Hose Connector (28) until it stops (Do not over tighten). Loosen (turn counter clockwise) the Poppet Seat 3 ¾ turns or until it extends about 3.2 mm from the Hose Connector (28). CAUTION THE POPPET SEAT SETTING DESCRIBED IN STEP 22 IS AN INITIAL ADJUSTMENT ONLY, AND SHOULD BE RESET IF IT IS DETERMINED THE CRACKING EFFORT IS NOT WITHIN THE ACCEPTABLE RANGE 21 23. Correctly place the Demand Lever Insert assembly (91) in the Second Stage Case (32), using wrench B-12. 24. Hold the Demand Lever Connector in place in the Second Stage Case as shown, insert the O-Ring (83) into the Seat between the Second Stage Case and the Demand Lever Connector using the special wrench (B-6). 22 23 B-12 24 a 24 b

2017 - revised 2017 Octopus MV S8 MV. REASSEMBLY 25. Put the Spacer Ring (96) in place, and use the 17-mm open-end wrench (B-17) to tighten the Hose Connector (28) in the second Stage Case. Press the Demand Lever a few times. Place a small amount of silicone grease on the threads of the O-ring side of the Hose Connector (28). 25 WARNING USE A TORQUE WRENCH TO TIGHTEN THE RETAINING NUT (17), USE A TIGHTENING TORQUE OF 6 ft*lbf / 8 Nm. 26. Install the O-ring (27) in the Second Stage end of the LP Hose (26) and the O-Ring (19) in the First Stage end of the Hose. 27 27. Using two wrenches (B-17), connect the Hose (26) to the Hose Connector (28). DANGER MAKE SURE THE HOSE CONNECTOR IS SECURELY TIGHTENED BEFORE CONNECTING THE LP HOSE. FAILURE TO DO SO, MAY RESULT IN THE HOSE CONNECTOR DISCONNECTING FROM THE SECOND STAGE CASE DURING USE. 28. Connect the LP Hose (26) with the Second Stage attached (without the second Stage cover installed) to the First Stage LP Port marked DFC. WARNING USE A TORQUE WRENCH TO TIGHTEN THE LP HOSE, USE A TIGHTENING TORQUE OF 3-3.5 ft*lbf / 4-4,5 Nm. CAUTION AT THIS POINT, CONNECT THE SECOND STAGE TO THE FIRST STAGE AND SET THE FIRST STAGE INTERMEDIATE PRESSURE AS DESCRIBED IN THE FIRST STAGE SERVICE MANUAL.

2017 - revised 2017 Octopus MV S9 MV. REASSEMBLY 29. Place the Second Stage Diaphragm (142) into the Cover (141). 30. Place the Cover (141) with the Diaphragm (142) on the Second Stage Case (32) and secure it with the Screws (140). 31. Insert the B12 wrench through the adjusting hole in the Second Stage Case and secure it to the Demand Lever Locknut. Tighten or loosen the Demand Lever Locknut (32) to properly adjust the Demand Lever (35). CAUTION THE DEMAND LEVER IS ADJUSTED CORRECTLY WHEN THE LEVER IS SLIGHTLY LOOSE, AND AIR BEGINS TO FLOW WHEN THE PURGE BUTTON IS DEPRESSED ABOUT 2MM. A TAPPING SOUND OF THE DEMAND LEVER TOUCHING THE METAL DISK OF THE SECOND STAGE DIAPHRAGM SHOULD BE AUDIBLE WHEN THE PRESSURIZED SECOND STAGE IS SHAKEN VIGOROUSLY UP AND DOWN. 29 32. Carefully install a new Exhaust Valve (40) by gently pulling the silicone valve stem through the hole of the Second Stage Exhaust Valve Holder (144). CAUTION IN ORDER TO AVOID DAMAGING THE EXHAUST VALVE, DO NOT PULL THE STEM TOO HARD 33. Place the Exhaust Valve Holder (144) assembly in the Second Stage case (32) with the Exhaust Valve facing outward. 30 31 32 33

2017 - revised 2017 Octopus MV S10 MV. ADJUSTMENT 34. Recheck Intermediate Pressure (9.8-10.2 bar/ 142-148 psi). MAGNEHELIC GAUGE 35. Attach the Second Stage to a Magnehelic Gauge. 36. Measure the Second Stage Cracking Effort. CAUTION THE CRACKING EFFORT MUST BE READ THE MOMENT THE INTERMEDIATE PRESSURE STARTS TO DECREASE. Magnehelic gauge Inches Magnehelic gauge cm Rover Oct. 3.5 4.1 1.4-1.6 37. If the Cracking Effort is outside of the acceptable range, proceed as described below: 37.1 Move the Second Stage side Hose Protector (46). Using two wrenches (B-17), unscrew the Hose (26) from the Hose Connector (28). 37.2 If the Cracking Effort value is lower than the acceptable range, screw in the Poppet Seat (21), a ¼ turn at the time till the value is correct. 37.3 If the Cracking Effort value is higher than the acceptable range, unscrew the Poppet Seat (21), a ¼ turn at the time till the value is correct.

2017 - revised 2017 Octopus MV S11 MV. ADJUSTMENT 37.4 Using two wrenches (B-17), connect the LP Hose (15) to the Hose Connector (28). 37.5 Put the Hose Protector (46) in place. 37.6 Measure the Second Stage Cracking Effort. Follow the steps described above until the acceptable cracking effort value is reached. 40 38. Shut off the HP air supply and purge all residual air. 39. Inhale directly from the Second Stage Mouthpiece in order to detect any air leakage from inside of the case. MV. FINAL ADJUSTMENT 40. Assemble the Exhaust Grid (145) on the support flange on the Second Stage. CAUTION MAKE SURE THAT BOTH PINS ARE LOCKED INTO THE CASE. 41. Carefully assemble the Mouthpiece (44), securing it with a new Mouthpiece Clamp (43).

2017 - revised 2017 Octopus MV S12 MV. TROUBLESHOOTING Problem Probable Cause Solution Continuous or intermittent air flow from the Second Stage Cracking Pressure higher than acceptable range Rubber Pad (47) Damaged Sealing surface of the Adj. Seat (21) is dirty or damaged IP exceeds acceptable range Demand Lever set too high Poppet Spring (31) out of position or damaged Incorrect Poppet Seat (21) adjustment (too low) NBS spring (166) missing Demand Lever set too low IP outside of acceptable range Tank valve not fully opened Second Stage Poppet Spring deformed or damaged First Stage filter clogged Incorrect Poppet Seat (21) adjustment (too high) High Poppet Spring tension Replace Rubber Seat Clean or replace Poppet Seat Adjust IP to (9.8 10.2 bar) (142 148 psi) Or Cold Water Kit (8.7 9.4 bar) (127 136 psi) Adjust to correct height Position correctly or replace Adjust to 3 ¾ Turns/3,2 mm Place it correctly Adjust to correct height Adjust IP to (142 148) Or Cold Water Kit (127 136) Completely open the tank valve Replace Poppet Spring Overhaul First Stage and replace filter Adjust to 3 ¾ Turns/3,2 mm Replace Poppet Spring

2017 - revised 2017 Octopus MV S13 MV. TROUBLESHOOTING Problem Probable Cause Solution Cracking Pressure lower than acceptable range Traces of water inside Second Stage Vibration sound from Second Stage during inhalation IP outside of acceptable range Second Stage Poppet Spring deformed or damaged Demand Lever set too high Incorrect Poppet Seat (21) adjustment (too low) Exhaust valve support back-to-front Exhaust Valve support dirty Exhaust Valve (40) damaged Diaphragm (36) dirty, damaged, or incorectly positioned Mouthpiece (44) loose or damaged Diaphragm (36) incorrectly positioned Incorrect Demand lever adjustment Poppet Spring (31) damaged or incorreclty positioned Adjust IP to (9.8 10.2 bar) (142 148 psi) Or Cold Water Kit (8.7 9.4 bar) (127 136 psi) Replace Poppet Spring Adjust to correct height Adjust to 3 ¾ Turns/3,2 mm Position it correctly Clean support Replace Exhaust Valve Clean, position correctly or replace Replace the clamp; replace mouthpiece Check and position correctly Check and adjust correctly Check and Position correctly or replace

2017 - revised 2017 Octopus MV S14 MV. DRAWING E 34 Updated: 21/11/2013

2017 - revised 2017 Octopus MV S15 MV. CHART 124 Updated: 10/01/2017 CHART NO: 124 OCTOPUS MV UPDATED: 10/01/2017 REF CODE DESCRIPTION REF CODE DESCRIPTION 19 46110106 OR 106 96 46187038 LOCK RING 21 46200204 POPPET SEAT 104 46200687 MARES OVAL LABEL - 17,5 mm 26 46201383 LP HOSE 3/8 yellow 100 cm WO/HOSE PROTECTOR 140 46187004 SCREW M 2X5 DIN 7985-A4 27 46110205 OR 2025 141 46187028 COVER MV YELLOW 28 46184282 HOSE CONNECTOR 142 46187009 OVAL DIAPHRAGM 30 46184219 POPPET METAL BODY REGS 143 46110175 O RING 2125 31 46201385 SPRING REGULATOR SECOND STAGE 144 46187025 EXHAUST VALVE SEAT 32 SECOND STAGE CASE 145 46201220 EXHAUST VALVE GRID BK 33 46185051 LOCKNUT, DEMAND LEVER 151 46187008 WHITE WASHER 1,8X5X0,5 34 46185049 WASHER DEMAND LEVER 152 46187005 FLAT WASHER UNI 6592 D 4,5 35 46187026 DEMAND LEVER 166 46200179 CONICAL SPRING. 40 46201219 EXHAUST VALVE 43 47157984 MOUTHPIECE CLAMP ASSEMBLIES 44 --- SEE CATALOGUE --- 46200855 10 PACK BLACK MOUTHPIECES 45 46201249 HOSE PROTECTOR --- 46200780 SECOND STAGE CASE MV (32-166) 46 46201473 HOSE PROTECTOR SECOND STAGE --- 46187222 SERVICE KIT SECOND STAGE MV 47 46184062 RUBBER SEAT SECOND STAGE --- 46200510 KIT RETROFIT (21-27-47) 54 46186090 OCTOPUS PLUG 71 46110211 OR 2050 83 46110225 OR 2068 Parts highlighted in red are included in the service kits 46187222 91 46187033 POPPET HOUSING Service kit (Viton) is available in the Accessory 1 section until the stocks 92 46184221 VALVE BODY SECOND STAGE ends; it will be replaced by the Service kit with NBR O-rings

ERGO LP INFLATOR ERGO LP INFLATOR

original copywriter 1987 revised 1998 - printed 1999 ERGO LP INFLATOR B2-1 LP INFLATOR REMOVAL 1. Unscrew the rapid exhaust valve (RE) locking nut and remove the entire infl ator system from the BC. 2. Remove the gasket from the BC collar. DISASSEMBLY 1. Gently pry off the mouthpiece (61) (see numbered Ergo LP infl ator diagram) using a slotted screwdriver. 2. Press the power infl ate button (54). Insert a 1/8 pin punch into the small round hole near the manual quick disconnect (QD) fi tting, then push the pin (53) until it comes out completely (Fig. 1). 3. Remove the infl ate button (54) and 0-ring (55). 4. Remove 0-ring (55) from infl ate button (54). 5. Remove spring (48). 6. Remove the valve holder unit by inserting fl at-nose pliers into the notches of the valve holder (57). Pull the valve holder (57) straight out of the infl ator body (Fig. 2 and 3). 7. Remove the two 0-rings (58) from the valve holder. 8. With suitable pliers, cut clamp (59) and remove the corrugated hose (60) from the infl ator (46). By lightly clamping LP infl ator (46) in a vice with plastic jaws, use two small screwdrivers to depress the two tabs on the anchoring bushing (47), then remove the anchoring bushing from the infl ator body (Fig. 4). 9. Remove spring (48) from the anchoring bushing (47). 10. With special tool (P/N 106190 Fig. 5) or needle nose pliers, compress the defl ate button retaining tabs and remove defl ate button (52) from bushing (49) (Fig. 6). 11. Remove O-ring (50) from bushing (49). 12. Remove O-ring (5 1) from defl ate button (52). 13. Remove the male QD cap (27) from the male QD (13) and using a 14 mm hex wrench, unscrew the male QD connector. 14. Remove O-ring (9) from the connector. 15. Remove the fi lter (22) from the infl ator body. 16. Remove the male QD cap (27) and LP hose clip (62) from the corrugated hose (60) only if the male QD cap, LP hose clip or corrugated hose are to be replaced. 17. If the anchoring bushing (47), corrugated hose (60), RE valve plate (63) or actuating cable (66) are to be replaced, cut the cable near the anchoring bushing. Fig. 1 Fig. 2 Fig. 3 Fig. 4 ONCE THE ACTUATING CABLE HAS BEEN CUT IT MUST BE REPLACED. THE ACTUATING CABLE SHOULD BE CUT ONLY IF THE ANCHORING BUSHING (47), CORRUGATED HOSE (60), RE VALVE PLATE (63) OR ACTUATING CABLE (66) ARE TO REPLACED. Fig. 5

B2-2 ERGO LP INFLATOR original copywriter 1987 revised 2012 - printed 2013 18. Remove anchoring bushing (47) from actuating cable (66). 19. With suitable pliers, cut clamp (59) and remove the corrugated hose (60) from the RE valve (F). 20. Unscrew the RE cap (69) and remove (Fig. 7). 21. Remove the exhaust diaphragm (6) and housing (7) from RE cap (69). IT IS NOT NECESSARY TO REMOVE THE EXHAUST DIAPHRAGM (6) FROM THE HOUSING (7), UNLESS THE EXHAUST DIAPHRAGM OR HOUSING ARE TO BE REPLACED. Fig. 6 22. Remove gasket (67) from RE housing. 23. Remove the RE valve plate (63) from the RE housing and unthread the actuating cable (66), detaching it from RE valve plate (63). 24. Remove spring (64) from RE housing. DISASSEMBLY RE VALVE 2K12 Fig. 7 I. With suitable pliers, cut clamps (59) and remove the corrugated hose (60) from the RE valve (32). II. Remove Spring Bearing(38) from RE valve body (32), using a small screwdriver. III. Take the Gasket (34) out. IV. Untie rope only in case Line(66) and/or Bushing (47) must be replace/s. Photo 1 Photo 2

original copywriter 1987 revised 1998 - printed 1999 ERGO LP INFLATOR B2-3 CLEANING Cleaning requires all reusable rubber and plastic parts to be carefully cleaned by scrubbing with a soft brush in a mild detergent and water solution. Do not use solvents or acids on rubber or plastic parts. Metal parts should be cleaned in an ultrasonic cleaner with fresh water or a mild acid solution. (White vinegar diluted with warm water is recommended). Before reassembly make sure all parts have been carefully rinsed and dried. WARNING! ACIDS MAY CAUSE BURNS, OR SKIN, EYE OR RESPIRATORY IRRITATION. WHEN WORKING WITH ANY KIND OF ACID PROTECT EYES AND SKIN ADEQUATELY AND WORK IN A WELL VENTILATED AREA. ACIDS MAY DAMAGE RUBBER AND PLASTIC PARTS. BEFORE CLEANING METAL PARTS, MAKE SURE THAT ALL RUBBER AND PLASTIC PARTS HAVE BEEN REMOVED. INSPECTION The following components should be replaced during routine service. Description Part Number Filter (22) 159146 0-ring, male QD (9) 110106 0-ring, bushing (50) 110241 0-ring, deflate button (51) 110117 0-ring, inflate button (55) 110210 0-ring, valve holder (58) 110221 If the following parts are not replaced, they should be inspected with a jeweler s loop or similar magnifying device, for the defects listed below. Replace any part with these defects. Male OD fitting (13): Filter (22): Inflator body (46): Inflate button (54): Pin (53): Valve holder (57): Deflate button (52): Bushing (49): Inspect for wear, corrosion or loose plating. Inspect the filter surface for any foreign matter or deposits. Inspect the body for any signs of cracks and check all surfaces in contact with 0-rings. Inspect the QD threads for any signs of damage. Inspect for wear or cracking. Inspect for wear or distortion. Inspect the valve for any signs of contamination or corrosion. Inspect the holder for any signs of scratches on O-ring surfaces or cracking. The valve and holder are replaced as an assembly. Inspect the deflate button retaining tabs for any signs of distortion or breakage. Inspect for wear or cracking.

B2-4 ERGO LP INFLATOR original copywriter 1987 revised 1998 - printed 1999 Anchoring bushing (49): Actuating cable (66): Corrugated hose (60): RE housing (E): RE valve plate (63): Gasket (67): Exhaust diaphgram seat (7): Exhaust diaphgram (6): Cap (69): Springs: 0-rings: 0-ring seats: Inspect the locking tabs and actuating cable attaching hole for wear or cracking. Inspect the knots for tightness and any signs of frayed cable. Inspect for wear or cracking. Inspect the housing for cracks and all thread surfaces for damage. Inspect for wear or scratches on the gasket sealing surface. Inspect for cracking, brittleness and splits. Inspect for wear or cracking. Inspect for wear or cracking. Inspect threads for damage. Inspect for cracking or broken coils. Inspect for cuts, tears, flat spots or contamination. The presence of any of these defects may cause leakage. Inspect all surfaces in contact with 0-rings and other seals for chipping, scratches or contamination. WARNING! ACIDS MAY CAUSE BURNS, OR SKIN, EYE OR RESPIRATORY IRRITATION. WHEN WORKING WITH ANY KIND OF ACID PROTECT EYES AND SKIN ADEQUATELY AND WORK IN A WELL VENTILATED AREA. ACIDS MAY DAMAGE RUBBER AND PLASTIC PARTS. BEFORE CLEANING METAL PARTS, MAKE SURE THAT ALL RUBBER AND PLASTIC PARTS HAVE BEEN REMOVED. REASSEMBLY Before reassembly, slightly lubricate all 0-rings with silicone grease (General Electric, Versalukie G-322 or equivalent). Lubricating the 0-rings before reassembly will minimize the risk of damage during reassembly. 1. If the actuating cable (66) is to be replaced. cut the replacement cable to a length of 51 cm. (20 in.) and tie a knot at one end. 2. Thread the actuating cable (66) through the RE valve plate (63) so that the end of the actuating cable without the knot is protruding from the center hole of the RE valve plate. Pull the actuating cable through the center hole of the RE valve plate until the knot is fed into the seat of the RE valve plate. 3. Thread the actuating cable through the spring (64) so the smaller diameter of the spring faces the RE valve plate (63).

original copywriter 1987 revised 1998 - printed 1999 ERGO LP INFLATOR B2-5 4. Thread the actuating cable through the RE housing (F), over the internal pin and out through the hose connector opening. Pull the loose end of the actuating cable until the Spring (64) and RE valve plate (63) are positioned inside the RE Valve body (E). 5. Install the exhaust diaphragm (6) onto the housing (7) and trim the exhaust diaphragm stem. THE EXHAUST DIAPHRAGM (6) MUST BE AGAINST THE FLAT SMOOTH SIDE OF THE SEAT (7). 6. Insert the exhaust diaphragm (6) and housing (7) into the RE Valve cap (69) with the diaphragm facing the cap. 7. Position the gasket (67) onto the cap (69), with the stepped side of the gasket facing the cap. 8. Thread the cap (69) with the exhaust diaphragm (6), housing (7) and gasket (67) into the RE housing (F) and tighten. V. Fit the Line (66) in the RE Valve Piston (35) only whether previously you untie that. VI. Position the gasket (34) onto the Spring Bearing (35) as shown. IF NECESSARY CLEAN THE GASKET WITH MILD DETERGENT AND WATER SOLUTION. VII. Fix Spring Bearing + Gasket into the RE Valve Body.Slide the corrugated hose (60) onto the RE housing (32) and secure with clamps. 9. If the male QD cap (27) or LP hose clip (62) were removed from the corrugated hose (60) or if the corrugated hose was replaced, install the male QD cap and LP hose clip on the corrugated hose. 10. Thread the actuating cable through the corrugated hose (60). 11. Slide the corrugated hose (60) onto the RE housing (F) and secure with clamp (59). 12. Thread the actuating cable (66) through the anchoring bushing (47) and tie a knot in the actuating cable in a location that will allow the base of the anchoring bushing to just protrude from the corrugated hose. 13. Place o-ring (51) into the o-ring groove of the deflate button (52). 14. Insert the deflate button (52) with o-ring (51) into the inflator body (46). 15. Place 0-ring (50) on bushing (49). 16. With special tool (P/N 106190 Fig. 5) or needle nose pliers, insert bushing (49) with 0-ring (50), facing the deflate button, into the inflator body until the deflate button retaining tabs engage the bushing (Fig. 8-9). 17. Place the spring (48) on the anchoring bushing (47) and insert the anchoring bushing with spring into the inflator body until the locking tabs engage the inflator body. Depress the deflate button and release. The deflate button should return to its original position. If it does not return to its original position repeat steps 12-16 making sure all parts are in the correct location. Photo 3 Photo 4 Fig. 5 Fig. 6