TECHNICAL MANUAL OPERATION AND MAINTENANCE MANUAL WITH ILLUSTRATED PARTS BREAKDOWN ORGANIZATIONAL LEVEL

Transcription

1 Revision 1 TECHNICAL MANUAL OPERATION AND MAINTENANCE MANUAL WITH ILLUSTRATED PARTS BREAKDOWN ORGANIZATIONAL LEVEL SELF-CONTAINED BREATHING APPARATUS BREATHING AIR CHARGING SYSTEM (SCBA BACS) 0910-LP DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. PUBLISHED BY DIRECTION OF THE COMMANDER, NAVAL SEA SYSTEMS COMMAND L P

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3 Revision 1 TECHNICAL MANUAL OPERATION AND MAINTENANCE MANUAL WITH ILLUSTRATED PARTS BREAKDOWN ORGANIZATIONAL LEVEL SELF-CONTAINED BREATHING APPARATUS BREATHING AIR CHARGING SYSTEM (SCBA BACS) 0910-LP DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. 28 AUGUST 2004 PUBLISHED BY DIRECTION OF THE COMMANDER, NAVAL SEA SYSTEMS COMMAND

4 LIST OF EFFECTIVE PAGES INSERT LATEST CHANGE PAGES. DESTROY SUPERCEDED PAGES. NOTE: The portion of the text affected by the changes is indicated by a vertical line in the outer margins of the page. Changes to illustrations are indicated by miniature pointing hands. Dates of issue for original and changed pages are: Original January 1998 Revision August 2004 TOTAL NUMBER OF PAGES IN THIS PUBLICATION IS 121, CONSISTING OF THE FOLLOWING: Page *Change No. No. Title...0 A...0 i-v...0 vi Blank...0 vii...0 viii Blank...0 ix...0 x Blank...0 xi...0 xii Blank Blank Blank A A-2 Blank...0 A A-4 Blank...0 A-5 A A-8 Blank...0 A A-10 Blank...0 A A-12 Blank...0 Page No. *Change No. *Zero in this column indicates an original page A Revision 1

5 RECORD OF CHANGES CHANGE NO. DATE TITLE OR BRIEF DESCRIPTION ENTERED BY

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7 TABLE OF CONTENTS Section Page LIST OF ILLUSTRATIONS...iv LIST OF TABLES...v FOREWORD...vii ABBREVIATIONS AND ACRONYMS...ix SAFETY SUMMARY...xi CHAPTER 1 INTRODUCTION AND SAFETY PRECAUTIONS INTRODUCTION Purpose Scope SYSTEM DESCRIPTION SPECIFICATIONS SAFETY PRECAUTIONS Standard Safety Precautions General Safety Instructions Warnings, Cautions, And Notes Special Precautions EQUIPMENT AND ACCESSORIES SUPPLIED REFERENCE PUBLICATIONS NOT SUPPLIED EQUIPMENT ACCEPTANCE Inventory Maintenance Verification Inspection INITIAL OPERATIONAL TEST STORAGE REQUIREMENTS CHAPTER 2 OPERATION INTRODUCTION CONTROLS AND INDICATORS OPERATING PROCEDURES Setup Operation Disassembly Emergency Operation CHAPTER 3 FUNCTIONAL DESCRIPTION INTRODUCTION DESCRIPTION ABPA Drive Air Inlet Pressure Gauge (AHP G201) Drive Air Regulator (AHP-V201) Regulated Air Pressure Gauge (ALP-G202) Revision 1 i

8 TABLE OF CONTENTS (Continued) Section Page Drive Air Filter Drive Air Relief Valve (ALP-V202) Drive Air Bleed Valve (ALP-V204) Drive Air Control Valve (ALP-V203) Filtered Air Inlet Pressure Gauge (AHP-G204) Filtered Air Inlet Valve (AHP-V206) Booster Pump Surge Tank Filtered Air Relief Valve (AHP-V207) Pilot Switch (AHP-V205) In-Line Filter Filtered Air Outlet Pressure Gauge (AHP-G203) HPFA Coalescor Filter Relief Valve (AHP-V304) Check Valve (AHP-V303) Cartridge Holders Manifold H 2 O/CO Indicator HPFA Indicator (AHP-G301) In-Line Filters Shutoff Valve (AHP-V301) Bleed Valve (AHP-V302) Drain Valve (AHP-V305) Connecting Hose Assemblies Drive Air Hose Assembly Filtered Air Hose Assembly Filtered Air Supply Hose Assembly Quick-Charge Wand CHAPTER 4 SCHEDULED MAINTENANCE INTRODUCTION SCOPE SAFETY REQUIREMENTS MAINTENANCE CONCEPT Scheduled Maintenance Unscheduled Maintenance PLANNED MAINTENANCE SYSTEM ii Revision 1

9 TABLE OF CONTENTS Section Page 4.6 UNITED STATES NAVY MAINTENANCE AND MATERIAL MANAGEMENT SYSTEM COVERAGE AND PROBLEM REPORTING GENERAL MAINTENANCE INSTRUCTIONS Equipment Disassembly and Parts Replacement Bagging Components General Cleaning Procedure Leak Detection Anti-seize Tape Lubricants O-Rings O-Ring Removal O-Ring Installation CHAPTER 5 TROUBLESHOOTING INTRODUCTION GENERAL TROUBLESHOOTING INSTRUCTIONS CHAPTER 6 CORRECTIVE MAINTENANCE INTRODUCTION Scope Safety Requirements GENERAL MAINTENANCE INFORMATION Maintenance Parts Related Maintenance TEST EQUIPMENT AND TOOLS MATERIALS REQUIRED GENERAL MAINTENANCE PROCEDURES System Tightness Test ABPA Tightness Test HPFA Tightness Test ABPA CORRECTIVE MAINTENANCE Booster Pump Removal and Installation Drive Air Regulator (AHP-V201) Removal and Installation Drive Air Relief Valve (ALP-V202) Removal and Installation Drive Air Control Valve (ALP-V203) Removal and Installation Drive Air Bleed Valve (ALP-V204) Removal and Installation Pilot Switch (AHP-V205) Removal and Installation Filtered Air Inlet Valve (AHP-V206) Removal and Installation Surge Tank and Filtered Air Relief Valve (AHP-V207) Removal and Installation Revision 1 iii

10 TABLE OF CONTENTS Section Page Drive Air Inlet Pressure Gauge (AHP-G201), Regulated Air Pressure Gauge (AHP-G202), and Filtered Air Inlet Pressure Gauge (AHP-G204) Removal and Installation Filtered Air Outlet Pressure Gauge (AHP-G203) Removal and Installation Drive Air Filter Removal and Installation In-Line Filter Removal and Installation Spooler Valve Assembly Removal and Installation HPFA Corrective Maintenance Bleeding HPFA Filter Removal and Installation Shut Off Valve (AHP-V301) Removal and Installation Check Valve (AHP-V303) Removal and Installation Drain Valve (AHP-V305) Removal and Installation CHAPTER 7 ILLUSTRATED PARTS BREAKDOWN INTRODUCTION PARTS LISTS AND ILLUSTRATIONS LIST OF MANUFACTURERS APPENDIX A OPERATIONAL CHECKLISTS...A-1 A-1 INTRODUCTION...A-1 A-2 CHECKLISTS PROVIDED...A-1 LIST OF ILLUSTRATIONS Figure Page 1-1 SCBA BACS Air Booster Pump Assembly (ABPA) Controls and Indicators High-Pressure Filter Assembly (HPFA) Controls and Indicators Filtered Air Supply Hose Assembly (H-103) Controls and Indicators Inlet/Outlet Connection Points SCBA BACS Functional Schematic and Flow Diagram Air Booster Pump Assembly (ABPA) High Pressure Filter Assembly (HPFA) Booster Pump Drive Air Regulator (AHP-V201) Drive Air Relief Valve (ALP-V202) Drive Air Control Valve (ALP-V203) Drive Air Bleed Valve (ALP-V204) Pilot Switch (AHP-V205) Filtered Air Inlet Valve (AHP-V206) iv Revision 1

11 LIST OF ILLUSTRATIONS (Continued) Figure Page 6-8 Surge Tank with Filtered Air Relief Valve (AHP-V207) Drive Air Inlet Gauge (AHP-G201), Regulated Air Pressure Gauge (ALP-G202), and Filtered Air Inlet Pressure Gauge (AHP-G204) Filtered Air Outlet Pressure Gauge (AHP-G203) Drive Air Filter In-Line Filter Tube Assembly Banjo Fitting Hex Nut Spooler Valve Assembly Spooler Valve Installation and Removal Tool Spooler Valve Sleeve Filter Shutoff Valve (AHP-V301) Check Valve (AHP-V303) Drain Valve (AHP-V305) ABPA (Sheet 1 of 4) HPFA (Sheet 1 of 2) LIST OF TABLES Table Page 1-1 SCBA BACS Specifications Equipment and Accessories Supplied Reference Publications Not Supplied SCBA BACS Planned Maintenance System ABPA Troubleshooting Guidelines HPFA Troubleshooting Guidelines Tools Required Materials Required ABPA Parts List HPFA Parts List Drive Air Hose Assembly Parts List Filtered Air Hose Assembly Parts List Filtered Air Supply Hose Assembly Parts List List of Manufacturers A-1 Setup Checklist... A-3 A-2 Operation Checklist... A-5 A-3 Disassembly Checklist... A-9 A-4 Emergency Operation Checklist... A-11 Revision 1 v/(vi blank)

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13 FOREWORD This technical manual contains procedures for operation and maintenance of the Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS). The information in this manual is presented in seven chapters and one appendix, as follows: Chapter 1 Introduction and Safety Precautions Chapter 2 Operation Chapter 3 Functional Description Chapter 4 Scheduled Maintenance Chapter 5 Troubleshooting Chapter 6 Corrective Maintenance Chapter 7 Illustrated Parts Breakdown Appendix A Operational Checklists Ships, training activities, supply points, depots, Naval Shipyards, and Supervisors of Shipbuilding are requested to arrange for the maximum practical use and evaluation of Naval Sea Systems Command (NAVSEA) technical manuals. The In-Service Engineering Agent (ISEA) may be contacted at Commanding Officer, Naval Surface Warfare Center Panama City, Attn: Code E53, 110 Vernon Avenue, Panama City, FL All errors, omissions, discrepancies, and suggestions for improvement to NAVSEA technical manuals shall be forwarded to: Naval System Data Support Activity (NSDSA), Code 5E30, Port Hueneme Division, Naval Surface Warfare Center. Technical Manual Deficiency/Evaluation Report (TMDER) (formally form NAVSEA 4160/1) can now be accessed, completed, and transmitted electronically to NSDSA. To access this form from the Internet, enter: At the Home Page, click on the TMDER icon. Complete the form and transmit as directed. All comments shall be thoroughly investigated and originators will be advised of action resulting from those comments. vii/(viii blank) Revision 1

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15 ABBREVIATIONS AND ACRONYMS 3-M Maintenance and Material Management ABPA AHP ALP A o BACS CAGE CGA CIN CO FEDLOG H 2 O HP HPFA IPB ISEA MDS METCAL MIL-STD MIP MRC MS NAVOSH NAVSEA NID NSDSA NSN OPNAV OPNAVINST PMS QD SAE SCBA SCBA BACS SCFM STEP TMDER TSP USN Air Booster Pump Assembly Air High Pressure Air Low Pressure Operational Availability Breathing Air Charging System Commercial and Government Entity Compressed Gas Association Course Identification Number Carbon Monoxide Federal Logistics Record Water High Pressure High-Pressure Filter Assembly Illustrated Parts Breakdown In-Service Engineering Agent Maintenance Data Sheet Metrology and Calibration Military Standard Maintenance Index Page Maintenance Requirement Card Military Specification Navy Occupational Safety and Health Naval Sea Systems Command Non-ionic Detergent Naval System Data Support Activity National Stock Number Office of the Chief of Naval Operations Office of the Chief of Naval Operations Instruction Planned Maintenance System Quick Disconnect Society of Automotive Engineers Self-Contained Breathing Apparatus Self-Contained Breathing Apparatus Breathing Air Charging System Standard Cubic Feet Per Minute Shipboard Training Enhancement Program Technical Manual Deficiency/Evaluation Report Trisodium Phosphate United States Navy Revision 1 ix/(x blank)

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17 SAFETY SUMMARY 1. GENERAL SAFETY NOTICES. The general safety notices supplement specific warnings and cautions appearing in this manual. All general safety notices and specific warnings and cautions must be understood and applied during all Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS) operation and maintenance functions. Should situations arise that are not covered in the general or specific safety notices, the commanding officer, or other authority, will issue orders as deemed necessary to cover the specific situation. In addition, refer to Office of the Chief of Naval Operations Instruction (OPNAVINST) , Navy Occupational Safety and Health (NAVOSH) Program Manual for Forces Afloat, Vol I/II/III or OPNAVINST , Navy Occupational Safety and Health (NAVOSH) Program Manual for any situation not covered in the general or specific safety notices. Revision 1 xi/(xii blank)

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19 CHAPTER 1 INTRODUCTION AND SAFETY PRECAUTIONS 1.1 INTRODUCTION Purpose. This manual contains technical information necessary to install, operate, troubleshoot, and maintains the Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS), hereinafter referred to as BACS (Figure 1-1). Reference to additional publications is given if auxiliary manuals exist or if lengthy procedures are required Scope. Information in this manual is presented in seven chapters and one appendix as follows: Chapter 1, Introduction and Safety Precautions, introduces safety considerations; presents a system description and specifications; reference data and publications; lists of equipment, accessories, and documents supplied with each system; equipment acceptance procedures; initial operational test procedures; and storage requirements. Chapter 2, Operation, provides a description of SCBA controls and indicators and detailed instructions on BACS setup, operating, and disassembly procedures. This chapter also provides BACS emergency shutdown procedures. Chapter 3, Functional Description, provides a detailed description of the function of each major component of the BACS. Chapter 4, Scheduled Maintenance, provides information required to perform scheduled and general maintenance procedures on the BACS. Chapter 5, Troubleshooting, provides tables to isolate BACS equipment malfunctions and direct the user to related maintenance procedures. Chapter 6, Corrective Maintenance, provides procedures required to perform corrective maintenance on the BACS. Chapter 7, Illustrated Parts Breakdown, provides illustrated parts breakdown for major components of the BACS. Appendix A, Operational Checklists, provides reproducible copies of checklists for BACS setup, operating, disassembly, and emergency procedures. 1.2 SYSTEM DESCRIPTION. The BACS (Figure 1-1) is used to recharge SCBA cylinder assemblies with breathing quality air (Grade D as defined by Compressed Gas Association [CGA] publication G-7.1). High Pressure Filter Assemblies (HPFAs) are hard mounted to the ship s bulkheads at various locations throughout the ship. The Air Booster Pump Assembly (ABPA) and connecting hose assemblies are portable and can be moved from one HPFA filter station to another. Personnel should become familiar with the shipboard location of all system components. Refer to Chapter 3 for a complete functional description of the system. Revision 1 1-1

20 1.3 SPECIFICATIONS. Table 1-1 lists the specifications for the BACS. 1-2 Figure 1-1. SCBA BACS.

21 Table 1-1. SCBA BACS Specifications. Equipment SCBA BACS High-Pressure Filter Assembly Air Booster Pump Assembly Connecting Hose Assemblies Specifications Specifications o Setup Time: 15 minutes o Operational Availability (A O ): 90% Subassemblies o High-Pressure Filter Assembly (HPFA) o Air Booster Pump Assembly (ABPA) o Connecting Hose Assemblies Specifications o Dimensions: 9.0 in. x 11.0 in. x 28.0 in. (LxWxH) o Weight: 68 lb o Bulkhead-mounted aluminum housing o Filter cartridge duration: maximum usage life 6 months (shelf life 18 months) o Produces Grade D air IAW CGA G-7.1 o High Pressure (HP) air requirements: 2,000-3,000 psig o Maximum flow rate: 60 scfm (filtered air only) o Maximum operating pressure: 3,000 psig o Relief valve (AHP-V304) setting: 3,300 psig Specifications o Dimensions: 33.5 in. x 14.4 in. x 22.5 in. (LxWxH) o Weight: 108 lb o Portable aluminum frame o HP air requirements: 2,000-3,000 psig o Boosts filtered HPFA air to 4,500 psig o Filtered air relief valve (AHP-V207) setting: 5,300 psig o Nominal drive air pressure: 125 psig o Drive air relief valve (ALP-V202) setting: 150 psig Specifications o Drive Air/Filtered Air Hose Assemblies nominal operating pressure: 3,000 psig o Filtered Air Supply Hose Assembly nominal operating pressure: 4,500 psig o Thermoplastic hose Components o Drive Air Hose Assembly (H-101) o Filtered Air Hose Assembly (H-102) o Filtered Air Supply Hose Assembly (H-103) 1.4 SAFETY PRECAUTIONS. Personnel using the BACS (Figure 1-1) shall observe the safety precautions specified in this technical manual. Personnel must understand the potential hazards associated with the BACS before operating or performing maintenance on the equipment. The following safety guidelines apply to operation and maintenance procedures in general and do not appear elsewhere in this publication, except by reference. Personnel must understand and comply with these guidelines during operation and maintenance of the BACS. The Safety Summary includes a comprehensive list of warnings and cautions that affect the system. Revision 1 1-3

22 1.4.1 Standard Safety Precautions. The BACS shall be used only after personnel have been properly instructed and have completed the BACS Shipboard Training Enhancement Program (STEP) operation training course. Personnel must use the equipment IAW instructions, labels, and limitations. Personnel should also complete the BACS STEP maintenance training course. Personnel must be th oroughly familiar with all safety practices and understand the potential hazards associated w ith the BACS before operat ing or performing maintenance on the equipment General Safety Instructions. Standard operational and maintenance safety precautions contained in the following documents apply to the SCBA BACS: Forces afloat must comply with Office of the Chief of Naval Operations (OPNAVINST) , Navy Occupational Safety and Health ( NAVOSH) Program Manual for Forces Afloat, Vol I/II/III Shore activities must comply with OPNAVINST , Navy Occupational Safety and Health (NAVOSH) Program Manual Warnings, Cautions, And Notes. The warnings, cautions, and notes appearing throughout this technical manual must be followed to prevent hazards to personnel and damage to equipment. The following notations define warnings, cautions, and notes as they are used in the text of this manual: WARNING Warnings highlight an essential operating or maintenance procedure, practice, condit ion, or statement, which, if not strictly observed, could result in injury to, or death of, personnel. CAUTION Cautions refer to an operating or maintenance procedure, practice, condition, or statement, which, if not strictly observed, could result in damage to, or destruction of, equipment, loss of mission effectiveness, or long-term health hazards to personnel. NOTE Notes refer to an operating or maintenance procedure, practice, condition, or statement that is essential, but not of a known hazardous nature Special Precautions. The warnings, cautions, and notes appearing throughout this technical manual must be followed to prevent hazards to personnel and damage to equipment. 1.5 EQUIPMENT AND ACCESSORIES SUPPLIED. Table 1-2 provides a listing of the equipment and accessories that are supplied with each BACS. 1-4

23 Table 1-2. Equipment and Accessories Supplied. Qty Item Reference Number or Part Number (PN) 1 EACH SCBA BACS Components: o High Pressure Filter Assembly (HPFA) 1 PN 53711ASSY o Air Booster Pump Assembly (ABPA) o Drive Air Hose Assembly (H-101) 1 o Filtered Air Hose Assembly (H-102) 1 PN 53711ASSY PN 53711ASSY PN 53711ASSY o Filtered Air Supply Hose Assembly (H-103) 1 PN 53711ASSY o Quick-Charge Wand 1 PN REF Planned Maintenance System (PMS) for Self-Contained Breathing MIP 5519/018 Apparatus Breathing Air Charging System (SCBA BACS) 1 EACH Special Tools: o Spanner Wrench 2 3 o Strap Wrench PN PN 54325A22 1 Quantity is ship class dependent. 2 One per HPFA. 3 One per ship system. 1.6 REFERENCE PUBLICATIONS NOT SUPPLIED. Table 1-3 lists reference publications that are not supplied with each BACS. Table 1-3 Reference Publications Not Supplied. Publication Title Publication Number Application BACS Shipboard Training Enhancement Program Course Identification Number Computer-based training (STEP) Operational (CIN) A BACS STEP Maintenance CIN A Computer-based training Cleaning of Shipboard Compressed Air Systems Military Standard Component cleaning (MIL-STD-1622) Commodity Spe cification for Air CGA G-7.1 Inspecting and testing fiberglass cylinders Metrology and Calibration (METCAL) Program NAVSEA A Calibration and maintenance of gauges Navy Occupational Safety and Health (NAVOSH) OPNAVINST Operation and Program Manual maintenance safety Navy Occupatio nal Safety and Health (NAVOSH) OPNAVINST Operation and Program Manual for Forces Afloat, Vol I/II/III maintenance safety Self-Contained Breathing Apparatus Scott Air-Pak S6220-EN-MMO-010 Operation and 4.5 maintenance manual Ships Maintenance and Material Management OPNAVINST (Series) Failure analysis (3-M) Manual reporting Revision 1 1-5

24 1.7 EQUIPMENT ACCEPTANCE. Upon receipt, BACS components must be inventoried and inspected. The equipment will not be ready for immediate operational use; shipboard installation is required Inventory. To ensure receipt of all items, conduct a visual inventory of all components IAW Table 1-2. The shipment should be compared with the packing lists included in the shipping documentation. Verify all serial numbers correspond with the accompanying packing lists Maintenance Verification. Examine the maintenance records acco mpanying shipments (e.g., Maintenance Requirement Cards [(MRCs)] and logbooks) to verify that required scheduled maintenance has been performed. Perform omitted MRCs, if any, before operating the equipment Inspection. Carefully remove each item from its packing container. Perform a thorough inspection, noting any discrepancies caused by the packing and manufacturing process. Inspect for completeness of assemblies, faulty workmanship, dirt, cracks, corrosion, and deterioration. Check the ABPA and HPFA for damage to the aluminum frames and control panel, and inspect the unit to ensure that all controls and indicators are in good operating condition. 1.8 INITIAL OPERA TIONAL TEST. a. Install filter cartridges and indicator elements IAW MIP 5519/018. b. Set up the BACS IAW procedures in paragraph c. Using an SCBA cylinder, conduct operational test IAW operating procedures paragraph d. Perform system tightness test IAW paragraph e. Disassemble the BACS IAW procedures described in paragraph STORAGE REQUIREMENTS. The BACS is a breathing supply support system; components must be handled and stored with care. If the BACS will not be used for 90 days or longer, prepare the system for long-term storage IAW MRC LU-1, Lay-up SCBA Breathing Air Charging System. General long-term storage precautions are listed as follows: Do not store components in temperatures higher than 120 º F (48.8 º C) or lower than 0 º F (-17 º C). Do not store components in direct sunlight; sunlight deteriorates rubber components. Ensure components are dry and clean when stored. Ensure flexible parts are not subjected to continuous distortion when stored. Ensure storage area is well-ventilated. 1-6

25 CHAPTER 2 OPERATION 2.1 INTRODUCTION. This chapter contains the following information: A description and illustration of the controls and indicators of the Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS); hereinafter referred to as BACS. Operational use procedures providing setup, operation, disassembly, and emergency operation procedures. Checklists for these procedures are provided in Appendix A. 2.2 CONTROLS AND INDICATORS. Controls and indicators for the Air Booster Pump Assembly (ABPA), the High Pressure Filter Assembly (HPFA), and the Filtered Air Supply Hose Assembly (H-103) are illustrated in Figures 2-1 through 2-3. The following information is provided for each illustration: Number identifies corresponding callout Nomenclature item name Function provides brief description of function of item Normal Operating Condition describes position of item during operational use or identifies maximum psig reading. Figure 2-4 illustrates the connection points for correct attachment of the connecting hose assemblies. Revision 1 2-1

26 No. Nomenclature Function 1 Filtered Air Outlet Pressure Gauge (AHP-G203) 2 Filtered Air Inlet Pressure Gauge (AHP-G204) 3 Drive Air Bleed Valve (ALP-V204) 4 Regulated Air Pressure Gauge (ALP-G202) 5 Drive Air Inlet Pressure Gauge (AHP-G201) 6 Filtered Air Inlet Valve (AHP-V206) 7 Drive Air Control Valve (ALP-V203) 8 Drive Air Regulator (AHP-V201) Indicates charging air pressure Indicates pressure from the HPFA Releases remaining drive air when charging is complete Indicates reduced drive air pressure after drive air has been regulated Indicates drive air pressure from HPFA Controls high-pressure filtered air from HPFA Controls drive air flow to booster pump from HPFA Regulates drive air pressure from HPFA Normal Operating Condition 4,500 psig 3,000 psig Closed 125 psig 3,000 psig Open Open 125 psig Figure 2-1. Air Booster Pump Assembly (ABPA) Controls and Indicators. 2-2

27 No. Nomenclature Function 1 HPFA Indicator (AHP-G301) Indicates air pressure in cartridge holders and manifold block Normal Operating Condition 3,000 psig 2 Shutoff Valve (AHP-V301) Stops air flow to ABPA Open 3 Bleed Valve (AHP-V302) Bleeds air pressure in HPFA Closed 4 Drain Valve (AHP-V305) Drains moisture from coalescor Closed 5 H 2 O/CO Indicator Indicates presence of water (H 2 O) or carbon monoxide (CO) in breathing air 6 Relief Valve (AHP-V304) Protects HPFA from over-pressurization Closed Blue (H 2 O) and yellow (CO) Figure 2-2. High-Pressure Filter Assembly (HPFA) Controls and Indicators. Revision 1 2-3

28 No. Nomenclature 1 Shutoff Knob, Hose Isolation Valve (AHP-V101, AHP-V102)* 2 Bleed Handle, Hose Isolation Valve (AHP-V101, AHP-V102)* Function Shutoff for Filtered Air Supply Hose Assembly (H-103) Bleeds filtered air supply from Filtered Air Supply Hose Assembly (H-103) Normal Operating Condition Closed Closed * B oth AHP-V101 and AHP-V10 2 refer to the Hose Isolation Valve. Figure 2-3. Filtered Air Supply Hose Assembly (H-103) Controls and Indicators. 2-4

29 Figure 2-4. Inlet/Outlet Connection Points. Revision 1 2-5

30 2. 3 OPERATING PROCEDURES. Paragraphs through address the following procedures: setup, operation, disassembly, and emergency operations. Appendix A provides corresponding checklists to be copied and used as needed Setup. The Setup Checklist (Table A-1) should be completed when the following procedures are performed. a. Move ABPA within 5 to 7 feet of HPFA. b. Ensure ship high-pressure (HP) air system valve is closed. WARNING A color change from blue to pink in the H 2 O/CO indicator reveals high moisture content; a color change from yellow to brown indicates a high CO content. Any color change requires replacement of filter cartridges and indicator elements to avoid serious injury or death to personnel. c. Check HPFA H 2 O/CO indicator for appropriate colors. d. Ensure HPFA shutoff valve (AHP-V301) and drain valve (AHP-V305) are closed. WARNING Before opening bleed valves, ensure all personnel stand clear to avoid serious injury or death from flying debris. Operator shall announce BLEEDING DOWN to warn nearby personnel. Operator must wear protective eyewear and hearing protection to prevent personal injury. e. Open HPFA bleed valve (AHP-V302). Bleed pressure; close valve. CAUTION Ensure hoses are routed to avoid equipment damage. f. Remove dust caps, connect drive air hose assembly (H-101) to HPFA and ABPA drive air inlet quick-disconnect sockets, and attach snap shackles to eye nuts. g. Remove dust caps, connect filtered air hose assembly (H-102) to HPFA and ABPA filtered air inlet quick-disconnect nipples, and attach snap shackles to eye nuts. h. Remove dust caps and connect Filtered Air Supply Hose Assembly (H-103) to ABPA filtered air supply. i. Ensure Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knobs and bleed handles are closed. 2-6

31 Operation. The Operation Checklist (Table A-2) should be completed when the following procedures are performed. WARNING Before operating the BACS, ensure that a gas sample has been taken within the last three months IAW Maintenance Requirements Cards (MRC) Q-1 to ensure that Grade D air quality, as defined by CGA G-7.1, is being produced to avoid serious injury or death to personnel. a. Ensure ABPA drive air regulator (AHP-V201) is fully unloaded by rotating counterclockwise. b. Ensure ABPA drive air control valve (ALP-V203), drive air bleed valve (ALP-V204), and filtered air inlet valve (AHP-206) are closed. c. Slowly open ship HP air system supply valve. d. Turn HPFA shutoff valve (AHP-V301) fully counterclockwise, then back off valve 1/4 turn. e. Adjust ABPA drive air regulator (AHP-V201) until regulated air pressure gauge (ALP-G202) reads 125 ±5 psig. NOTE The system can be configured to charge the following: (1) one or two SCBA cylinders, (2) one or two quick-charge wands, or (3) one SCBA cylinder and one quick-charge wand. f. Attach Filtered Air Supply Hose Assembly (H-103) to SCBA cylinder assembly(ies) and/or quickcharge wand(s) supplied with SCBAs. WARNING Do not refill any SCBA cylinder assembly that is damaged. Failures to inspect, depressurize, and remove a damaged SCBA cylinder assembly may result in serious injury or death to personnel. g. Prior to charging an SCBA cylinder assembly, inspect entire SCBA or SCBA cylinder assembly for evidence of exposure to chemicals, high temperature, impact damage, or worn components. NOTE If quick-charge wands are used, proceed to step s. h. Open SCBA cylinder(s) valve fully by rotating counterclockwise, then back off valve 1/4 turn. NOTE Filtered air outlet pressure gauge (AHP-G203) will indicate SCBA cylinder pressure. Revision 1 2-7

32 i. Open Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knobs for each SCBA cylinder assembly connected. j. Open ABPA filtered air inlet valve (AHP-V206). k. When readings on ABPA filtered air outlet pressure gauge (AHP-G203) and filtered air inlet pressure gauge (AHP-G204) are equal, open drive air control valve (ALP-V203) four to six complete turns. NOTE Open HPFA drain valve (AHP-V305) approximately every 15 minutes to vent moisture during charging evolution. l. When air booster pump stops or SCBA dual-reading pressure indicator reads approximately 4,500 psig, close Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-101/ AHP-V102) shutoff knob(s). WARNING Before opening bleed valves, ensure all personnel stand clear to avoid serious injury or death from flying debris. Operator shall announce BLEEDING DOWN to warn nearby personnel. Operator must wear protective eyewear and hearing protection to prevent personal injury. m. Close each SCBA cylinder valve fully; open Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) bleed handle(s) to bleed air between each SCBA cylinder assem bly and the corresponding hose isolation valve (AHP-V101/AHP-V102). Close bleed handle(s). n. Disconnect Filtered Air Supply Hose Assembly (H-103) from each SCBA cylinder assembly. If mission is complete, proceed to step y. If not, continue with next step. o. Attach Filtered Air Supply Hose Assembly (H-103) to SCBA cylinder assembly. p. Open each SCBA cylinder valve fully, and then back off valve 1/4 turn. q. Open Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knob(s) for each SCBA cylinder assembly connected. r. As needed, repeat procedure beginning with step l. When mission is complete, proceed to step y. CAUTION Ensure hoses are routed to avoid equipment damage. s. Open Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knob(s) for each quick-charge wand connected in step f. t. Open ABPA filtered air inlet valve (AHP-V206). 2-8

33 u. When readings on ABPA filtered air outlet pressure gauge (AHP-G203) and filtered air inlet pressure gauge (AHP-G204) are equal, open drive air control valve (ALP-V203) four to six complete turns counterclockwise. v. Connect a quick-charge wand to each SCBA. w. As each SCBA is filled, disconnect quick-charge wand. x. Repeat steps v and w as needed. When mission is complete, proceed to step y. y. Close ship HP air system valve. WARNING Before opening bleed valves, ensure all personnel stand clear to avoid serious injury or death from flying debris. Operator shall announce BLEEDING DOWN to warn nearby personnel. Operator must wear protective eyewear and hearing protection to prevent personal injury. NOTE ABPA regulated air pressure gauge (ALP-G202) and drive air inlet pressure gauge (AHP-G201) should read zero. z. Slowly open HPFA drain valve (AHP-V305) and ABPA drive air bleed valve (ALP-V204). Bleed drive air circuit. Close valves (AHP-V305 and ALP-V204). aa. Close HPFA shutoff valve (AHP-V301). WARNING Before opening bleed valves, ensure all personnel stand clear to avoid serious injury or death from flying debris. Operator shall announce BLEEDING DOWN to warn nearby personnel. Operator must wear protective eyewear and hearing protection to prevent personal injury. NOTE ABPA filtered air outlet pressure gauge (AHP-G203) and filtered air inlet pressure gauge (AHP-G204) should read zero. bb. Depressurize system IAW one of the following: (1) SCBA cylinder assembly charging configuration (a) Connect Filtered Air Supply Hose Assembly (H 103) to each SCBA cylinder assembly and open Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knob(s). (b) Bleed system using Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) bleed handle(s). Revision 1 2-9

34 (c) Close Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knob(s) and bleed handle(s). (d) Disconnect Filtered Air Supply Hose Assembly (H-103) from SCBA cylinder assembly. (2) Quick-charge configuration (a) Bleed system using Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) bleed handle(s). (b) Close Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knob(s) and bleed handle(s). (c) Remove quick-charge wand from Filtered Air Supply Hose Assembly (H-103). cc. Rotate ABPA filtered air inlet valve (AHP-V206) and drive air control valve (ALP-V203) fully clockwise. dd. Back off ABPA drive air regulator (AH P-V201) until spring tension is released. The BACS is now in STANDBY condition Disassembly. The Disassembly Checklist (Table A-3) should be completed when the following procedures are performed. a. Disconnect drive air hose assembly (H-101) and filtered air hose assembly (H-102) from HPFA and ABPA. Cap hose assemblies. b. Disconnect Filtered Air Supply Hose Assembly (H-103) from ABPA. Cap hose assembly. c. Cap all HPFA and ABPA drive air and filtered air connection points. d. Perform scheduled maintenance, as required. e. Stow hose assemblies and ABPA IAW ship procedures Emergency Operation. Emergency operation procedures shall be followed immediately should the BACS not operate in a normal manner. An Emergency Operation Checklist (Table A-4) should be completed. a. Immediately close ship HP air system valve. b. Refer to Chapter 5, Troubleshooting, for fault isolation procedures. 2-10

35 P P S6226-PD-MMO-010 CHAPTER 3 FUNCTIONAL DESCRIPTION 3.1 INTRODUCTION. This chapter defines the functions of the major equipment groups for the Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS). A description of how the equipment operates is also included. Figure 3-1 provides a functional schematic and flow diagram of the system. HP AIR GAUGE HP AIR SYSTEM VALVE SHIP'S AIR IN AHP-V304 DESICCANT FILTER DESICCANT/ HOPCALITE/ CHARCOAL FILTER HIGH PRESSURE FILTER ASSEMBLY AHP-V305 AHP-V303 INDICATOR AHP-G301 IN-LINE FILTER AHP-V301 MANIFOLD AHP-V302 H-101 H-102 AHP-G201 ALP-G202 ALP-V204 AIR BOOSTER PUMP ASSEMBLY AHP-V205 REG ALP-V202 AHP-V201 AHP-G204 DRIVE AIR FILTER ALP-V203 PILOT SWITCH DRIVE AIR INLET FILTER AIR INLET SURGE TANK AHP-V207 AHP-V206 BOOSTER PUMP DRIVE AIR INLET EXTERNAL PILOT AIR INLET IN-LINE FILTER AHP-G203 QUICK CHARGE WAND H-103 FILTER AIR SUPPLY Figure 3-1. SCBA BACS Functional Schematic and Flow Diagram. Revision 1 3-1

36 3.2 DESCRIPTION. The BACS is used by shipboard damage control and firefighting personnel as a means to charge SCBAs to a pressure of 4,500 psi wit h breathing quality air (Grade D as defined by the Compressed Gas Association (CGA) G-7.1). The BACS can be used for charging SCBA cylinder assemblies or for quick-charging SCBA. The BACS is comprised of three subassemblies: the Air Booster Pump Assembly (ABPA), the High Pressure Filter Assembly (HPFA), and connecting hose assemblies. The BACS receives high-pressure air from the ship high-pressure air system. The ship high-pressure air system is hard-piped into the bulkhead-mounted HPFA, where it is divided into filtered and unfiltered air and then routed to the ABPA via two high-pressure hose assemblies. The filtered air is used to charge SCBA or SCBA cylinder assemblies via a Filtered Air Supply Hose Assembly (H-102). The unfiltered high-pressure air from the HPFA is used to operate the booster pump ABPA. The ABPA is a two-man portable system housed within an aluminum tubular frame. The frame supports a control panel and is shielded by protective front and back covers. The ABPA receives both high-pressure filtered air and high-pressure drive (unfiltered) air from the HPFA. The filtered air enters the ABPA via a quick disconnect (QD), passes by a gauge, and flows through a shutoff valve, where airflow into the booster pump is controlled. The air enters the booster pump, where the air pressure is increased to 4,500 psig. The high-pressure air then takes three paths: (1) to the sensing port of a pilot switch (AHP-V205), which controls the flow of drive air to the booster pump; (2) to a surge tank, which serves to absorb highpressure fluctuations during operation; and (3) through an in-line filter, past a high pressure gauge, and into the SCBA cylinder assembly. A high-pressure relief valve is attached to the surge tank and is used to prevent over-pressurization of the filtered air circuit. The drive air enters the ABPA via a QD, passes a high-pressure gauge, and flows through a regulator, where pressure is reduced to 125 ± 5 psig. The reduced air is monitored by a low-pressure gauge and passes through a filter into a cross before taking three paths: (1) to the pilot switch (AHP-V205), which automatically stops the flow of drive air to the booster pump when the filtered air pressure reaches 4,500 psig; (2) to a relief valve (AHP-V304) that prevents over-pressurization of the drive air circuit; and (3) past a flow control valve that controls booster pump speed. Figure 3-2 illustrates and lists components of the ABPA Drive Air Inlet Pressure Gauge (AHP-G201). The drive air Inlet Pressure Indicator is a 0 to 5,000 psig pressure gauge that displays regulator inlet pressure from the HPFA Drive Air Regulator (AHP-V201). The drive air regulator reduces the ship high-pressure air sy stem to 125 ± 5 psig Regulated Air Pressure Gauge (ALP-G202). The Regulated Air Pressure Indicator is a 0 to 200 psig pressure gauge that displays the reduced air pressure reading after the drive air pressure is regulated Drive Air Filter. The drive air filter removes an automatic drain valve (AHP-V305). moisture and debris from drive air. This filter also has Drive Air Relief Valve (ALP-V202). The drive air relief valve is located between the drive air regulator (AHP-V201) and booster pump and actuates if drive air exceeds 150 psig Drive Air Bleed Valve (ALP-V204). The drive air bleed valve is used to release remaining drive air to the atmosphere after charging is complete Drive Air Control Valve (ALP-V203). The Drive Air Control Valve is a needle valve that controls the flow of drive air to the booster pump. The more the drive air valve is opened, the faster the booster pump will operate. 3-2

37 Number Nomenclature Number Nomenclature 1 Filtered Air Outlet Pressure Gauge 9 Booster Pump 2 Drive Air Relief Valve 10 Drive Air Regulator 3 In-Line Filter 11 Drive Air Filter 4 Filtered Air Inlet Pressure Gauge 12 Drive Air Control Valve 5 Drive Air Bleed Valve 13 Surge Tank 6 Filtered Air Inlet Valve 14 Filtered Air Relief valve 7 Regulated Air Pressure Gauge 15 Pilot Switch 8 Drive Air Inlet Pressure Gauge Figure 3-2. Air Booster Pump Assembly (ABPA) Filtered Air Inlet Pressure Gauge (AHP-G204). The Filtered Air Inlet Pressure Gauge is a 0 to 5,000 psig pressure gauge that indicates the filtered air pressure from the HPFA Filtered Air Inlet Valve (AHP-V206). The Filtered Air Inlet Valve is a needle valve that is used to control filtered air flow through the booster pump to the SCBA cylinder assemblies Booster Pump. The booster pump, powered by low pressure drive air, is used to compress air filtered by the HPFA to 4,500 psig. Revision 1 3-3

38 Surge Tank. The surge tank provides a volume to absorb high pressure fluctuations Filtered Air Relief Valve (AHP-V207). The Filtered Air Relief Valve is a relief valve that is located on the surge tank, and actuates if air pressure exceeds 5,300 psig Pilot Switch (AHP-V205). The pilot switch senses when the booster pump discharge pressure reaches 4,500 psig and shuts off the drive air supply In-Line Filter. The in-line filter removes particulates from booster pump discharge prior to entering the quick-charge wands Filtered Air Outlet Pressure Gauge (AHP-G203). The Filtered Air Outlet Pressure Gauge is a 0 to 6,000 psig pressure gauge that indicates charging air pressure HPFA. The HPFA is bulkhead-mounted and hard-piped into the ship high-pressure service line via a bulkhead union in the top back center of the HPFA. Air flows through the bulkhead fitting to a tee that directs the air to either (1) the drive air quick disconnect nipple and in-line filter ready for discharge to the ABPA or (2) to the HPFA filters. Air directed to the HPFA filters first passes through a coalescor filter, through a check valve, and then to the two cartridge holders. The first cartridge holder houses a desiccant cartridge for moisture removal. The second cartridge holder houses a cartridge that contains a desiccant for moisture removal, as well as a catalyst for conversion of carbon monoxide (CO) to carbon dioxide (CO2), and charcoal for odor removal. From the cartridge holders, the air enters the manifold, which directs the air to an H 2 O/CO indicator housing and a pressure gauge. The air then passes through a micronic filter to a shutoff valve and a quick disconnect socket, and is ready for discharge to the ABPA. Figure 3-3 illustrates and lists components of the HPFA Coalescor Filter. The coalescor filter removes moisture from air supplied by the ship high-pressure air system Relief Valve (AHP-V304). The relief valve actuates if pressure in the filter assembly exceeds 3,300 psig Check Valve (AHP-V303). The check valve ensures a one-way flow of air from the ship high-pressure air system to the cartridge holders Cartridge Holders. The two cartridge holders are identical, but hold different filter cartridges. The first, located on the right side of the assembly (labeled TOWER 1) holds a desiccant cartridge for moisture removal; the second, located on the left side of the assembly (labeled TOWER 2) holds a composite filter element containing a desiccant, a catalyst for conversion of CO to CO 2, and charcoal for odor removal Manifold. The manifold houses the H 2 O/CO indicator, HPFA gauge (AHP-G301), in-line filter, shutoff valve (AHP-V301), and bleed valve (AHP-V302) H2O/CO Indicator. The H 2 O/ CO indicator is located downstream of the cartridge holders and indicates the presence of water and carbon monoxide in breathing air HPFA Indicator (AHP-G301). The HPFA Indicator is a 0 to 5,000 psig pressure indicator that displays filtered air pressure in the HPFA In-Line Filters. The first in-line filter removes particulates from the drive air before it is discharged to the ABPA and the second removes any remaining particulates from the filtered air Shutoff Valve (AHP-V301). The shutoff valve controls filtered air flow to the ABPA. 3-4

39 Number Nomenclature Number Nomenclature 1 Relief Valve 7 Drain Valve 2 HPFA Indicator 8 Coalescor Filter 3 Drain 9 Check Valve 4 Bleed Valve 10 Cartridge Holder 5 Shutoff Valve 11 Manifold 6 H 2 O/CO Indicator 12 In-Line Filter Figure 3-3. High Pressure Filter Assembly (HPFA) Bleed Valve (AHP-V302). The bleed valve is used to release air from the filter assembly prior to changing filter cartridges Drain Valve (AHP-V305). The drain valve is used to periodically remove oil and moisture that has fallen to the bottom of the coalescor filter housing Connecting Hose Assem blies. Revision 1 3-5

40 Drive Air Hose Assembly. The Drive Air Hose Assembly (H-101) connects the HPFA drive air outlet QD to the ABPA drive air inlet QD Filtered Air Hose Assembly. The Filtered Air Hose Assembly (H-102) connects the HPFA filtered air outlet QD to the ABPA filtered air inlet QD Filtered Air Supply Hose Assembly. The Filtered Air Supply Hose Assembly (H-103) connects to the ABPA using a CGA 347 nipple with hand-tight nut. The Filtered Air Supply Hose Assembly (H-103) consists of two branches, each containing a combination bleed and shutoff valve. This design allows two possible charging configurations SCBA cylinder and/or quick charge Quick-Charge Wand. The Quick-Charge Wand is purchased from the SCBA manufacturer and allows a quick-charge operation when connected to the Filtered Air Supply Hose Assembly (H-103). 3-6

41 CHAPTER 4 SCHEDULED MAINTENANCE WARNING 4.1 INTRODUCTION. Omission or negligent performance of prescribed maintenance procedures for this equipment could result in equipment failure and serious injury or death to personnel. Proper scheduling and performance of preventive maintenance actions reduces equipment failures and ensures efficient performance of the Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS), hereinafter referred to as BACS. This chapter outlines safety requirements, defines the maintenance concept, references the BACS Planned Maintenance System (PMS), discusses reporting requirements, and provides general maintenance instructions relating to both scheduled and unscheduled (corrective) maintenance actions. 4.2 SCOPE. The preventive maintenance requirements for the BACS are addressed in this chapter to assist supervisors and maintenance personnel in planning, scheduling, and documenting maintenance actions. The information in this chapter supplements the BACS PMS (paragraph 4.5) and is presented in the following sequence: Safety Requirements Maintenance Concept Planned Maintenance System United States Navy (USN) Maintenance and Material Management (3-M) System Coverage and Problem Reporting General Maintenance Instructions 4.3 SAFETY REQUIREMENTS. Maintenance personnel shall read and thoroughly understand the safety precautions contained in this manual and the appropriate Maintenance Requirement Card (MRC) contained in the SCBA BACS PMS before performing any maintenance on the BACS. Forces afloat should also comply with Office of the Chief of Naval Operations Instruction (OPNAVINST) , Navy Occupation al Safety and Health (NAVOSH) Program Manual for Force s Afloat, Vol I/II/III. Shore activities should comply with OPNAVINST , Navy Occupational Safety and Health (NAVOSH) Program Manual. 4.4 MAINTENANCE CONCEPT. The BACS maintenance concept is based on the Navy PMS, which classifies maintenance into two categories: scheduled and unscheduled Scheduled Maintenance. Scheduled maintenance primarily involves actions required to ensure reliable system operation and includes actions such as inspection, cleaning, lubrication, leak testing, and Revision 1 4-1

42 operational testing. Scheduled maintenance requirements are provided in the BACS PMS (paragraph 4.5) and are also integrated in the operating procedures located in Chapter 2 of this manual Unscheduled Maintenance. Unscheduled (corrective) maintenance includes actions required to locate equipment faults and to correct failures or performance degradations. Unscheduled maintenance actions that include troubleshooting and parts replacements are performed by maintenance technicians who are adequately trained in the appropriate service requirements. Unscheduled maintenance is covered in Chapter 5, Troubleshooting, and in Chapter 6, Corrective Maintenance. 4.5 PLANNED MAINTENANCE SYSTEM. Table 4-1 lists the nine MRCs that govern the SCBA BACS PMS. The MRCs are indexed and referenced on Maintenance Index Page (MIP) 5519/018, SCBA BACS. MIP 5519/018 provides a summary of the maintenance actions found on the MRCs, along with periodicity codes, personnel requirements, man-hours, and any related maintenance. Table 4-1. SCBA BACS Planned Maintenance System. Periodicity MRC Description Q-1 Analyze Charging System Air Quality Q-2 Test Operate Air Booster Pump Assembly (ABPA) S-1 Replace High-Pressure Filter Assembly (HPFA) Tower Cartridges and HPFA H 2 O/CO Indicator Elements A-1 Replace Air Booster Pump Assembly (ABPA) Drive Air Filter and Seal A-2 Replace High-Pressure Filter Assembly (HPFA) Coalescor Element A-3 Inspect Teflon, Thermoplastic, and Metal Hoses, End Fittings, and Supports 18M-1 Remove ABPA Pressure Gauge(s), deliver to IMA for calibration, install calibrated ABPA Pressure Gauge(s), and Test for Leaks 36M-1 Test Set Pressure of Drive Air Relief Valve (ALP-V202); Remove and Deliver Valve(s) to IMA for Testing R-1 Inspect SCBA BACS 4.6 UNITED STATES NAVY MAINTENANCE AND MATERIAL MANAGEMENT SYSTEM COVERAGE AND PROBLEM REPORTING. The provisions of the OPNAVINST series, Ships Maintenance and Material Management (3-M) Manual, apply to the SCBA BACS. Accordingly, any problems or need for corrective maintenance arising from performance of the maintenance actions contained in the SCBA BACS MRCs should be properly reported using Office of the Chief of Naval Operations (OPNAV) Form 4790/2K to ensure timely and accurate Maintenance Data System (MDS) documentation of SCBA BACS performance in the Fleet. In addition to Fleet requirements, MDS input from Fleet units is used by the In-Service Engineering Agent (ISEA) to identify and correct problems within the system itself or the related documentation and provisioning, including Coordinated Shipboard Allowance List support. The ISEA may be contacted at Commanding Officer, Naval Surface Warfare Center Panama City, Attn: Code E53, 110 Vernon Avenue, Panama City, FL