OPERATOR, ORGANIZATIONAL, DIRECT AND GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL COMPRESSOR, RECIPROCATING, AIR; 15 CFM, 175 PSI;

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1 TM D E P A R T M E N T O F T H E A R M Y T E C H N I C A L M A N U A L OPERATOR, ORGANIZATIONAL, DIRECT AND GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL COMPRESSOR, RECIPROCATING, AIR; 15 CFM, 175 PSI; ELECTRIC MOTOR DRIVEN (INGERSOLL-RAND MODEL 242D7-½) FSN H E A D Q U A R T E R S, D E P A R T M E N T O F T H E A R M Y D E C E M B E R

2 TM TECHNICAL MANUAL HEADQUARTERS DEPARTMENT OF THE ARMY NO WASHINGTON, D.C.,29 December 1969 OPERATOR, ORGANIZATIONAL, DIRECT AND GENERAL SUPPORT AND DEPOT MAINTE- NANCE MANUAL COMPRESSOR, RECIPROCATING, AIR: 15 CFM, 175 PSI; ELECTRIC MOTOR DRIVEN, (INGERSOLL-RAND MoDEL 242D7-½) FSN Paragraph SECTION I. GENERAL INFORMATION Introduction General Data Associated Components Weights Overall Dimensions Description of Components Compressor Regulation Automatic Start and Stop Control....5 II. INSTALLATION Power Requirements Location and Ventilation Foundation Page i

3 Paragraph SECTION II. (CONTINUED) Belt Guard Clearances for Access Mechanical Assembly Procedures Testing for Satisfactory Installation III. OPERATION Pre-Starting Checks - New Units..... Operating Checks Safety Precautions Starting Stopping Operator s Maintenance IV. TROUBLESHOOTING General V. MAINTENANCE AND REPAIR General Torque Values Compressor Lubrication Periodic Inspection and Maintenance Drive Belts Air Valve Cleaning Piston Ring Replacement Separating the Piston from the Rod Page ii

4 Paragraph SECTION V. (CONTINUED) Crankshaft Assembly Replacement Oil Seal Replacement Pressure Switch Adjustment Pilot Valve Adjustment Check Valve Repair Precautions for Extended Shutdown...5-l4 VI. MISCELLANEOUS DATA General ELectric Motor Data - GEJ-2464D General Electric Starter Control Data - GEH-2402F Square D Pressure Switch Data - L Kunkle Valve Data - CS APPENDIX A. MAINTENANCE ALLOCATION CHART B. BASIC ISSUE ITEMS LIST Page A-1 B-1 iii

5 Section I SECTION I GENERAL INFORMATION. INTRODUCTION. This manual covers the installation, operation and maintenance of the Model 242 D7-1/2 Air Compressor. The instructions contained herein are for the guidance of personnel responsible for the operation and maintenance of the equipment.. GENERAL DATA. Manufacturer s Name Ingersoll-Rand Company Manufacturer's Model No D7-1/2 Manufacturer s Serial No X30T through X30T inclusive Capacity, CFM(cubic feet per minute) Pressure, PSIG (pounds per square inch gauge) Speed of Shaft, RPM (revolutions per minute) Motor Horsepower Working Pressure, PSIG First Stage Second Stage Safety Valve Pressure Setting, PSIG First Stage Second Stage Contract No DAAK-69-C-1735 Federal Stock No Maintenance Forms and Records Maintenance forms, records, and reports which are to be used by maintenance personnel at all levels are listed in and prescribed by TM

6 Section I 1-3. ASSOCIATED COMPONENTS. Refer to Section VI for the details of the following components: Drivcr General Electric Controller General Electric Air Pressure Switch Square D First Stage Safety Valve KunkleValve Second Stage Safety Valve Kunkle Valve 1-4. WEIGHTS. Controller, Lb (Pound) Recievcr, Lb Motor, Lb Compressor -Dry, Lb OVERALL DIMENSIONS. Width, In. (Inches) Height. In Length, In DESCRIPTION OF COMPONETS 1-7. GENERAL DESCRIPTION. The Model 242 D7-1/2 Air Compressor described by this manual is a two stage. air cooled reciprocating air compressor, capable of continuous operation at a rated capacity of 15 CFM at a discharge pressure of 175 PSIG when operating at a speed of 1040 RPM. The Model 242 D7-1/2 Air Compressors compact package consisting of several major components. These components are as follows: Model 242 Compressor, induction motor with magnetic controller, belt guard assembly, receiver, and an air hose assembly with inflator gauge. Refer to Figures and MODEL 242 COMPRESSOR. The Model 242 Compressor (Figure 1-3) is a 2-3/4-inch stroke, two cylinder, single acting, air cooled compressor. The cylinder bore diameter of the first stage cylinder is 4 inches and that of the second stage cylinder is /2 inches. The compressor assembly comprises a totally enclosed crankcase which supports a counterweighted crankshaft and a balanced fan-type flywheel, an oil f iller, a pilot valve and centrifugal unloader, two compressing cylinders, an intercooler assembly and an aftercooler assembly. The crankcase also serves as a sump for the lubricating oil. The crankshaft supports

7 Section I Figure. Model 242D7-/2 Compressor, Front View Figure. Model 242D7-1/2 Compressor, End View 1-3

COMPRESSOR, RECIPROCATING: AIR HANDTRUCK MOUNTED, GASOLINE ENGINE DRIVEN, 8 CFM, 175 PSI (C & H DISTRIBUTORS MODEL ) NSN

COMPRESSOR, RECIPROCATING: AIR HANDTRUCK MOUNTED, GASOLINE ENGINE DRIVEN, 8 CFM, 175 PSI (C & H DISTRIBUTORS MODEL ) NSN TECHNICAL MANUAL OPERATOR S, ORANIZATlONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL INTRODUCTION PAGE 1-1 OPERATING INSTRUCTIONS PAGE 2-1 OPERATORS' MAINTENANCE PAGE 3-1 ORGANIZATIONAL MAINTENANCE