Chapter 1 INTRODUCTIONModel PH-400-G HeaterSection Il. EQUIPMENT DESCRIPTION AND DATALOCATION AND DESCRIPTION OF MAJOR COMPONENTS - TM-9-4520-251-14_11EQUIPMENT DATAEQUIPMENT DATA CONT.Chapter 2 OPERATING INSTRUCTIONSPREVENTIVE MAINTENANCE CHECKS AND SERVICES - TM-9-4520-251-14_15Table 2-1. Operator/Crew Preventive Maintenance Checks and ServicesTable 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_17Table 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_18Table 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_19Table 2-1. Operator/Crew Preventive Maintenance Checks and Services ContinuedTable 2-1. Operator/Crew Preventive Maintenance Checks and Services ContinuedTable 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_22Table 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_23Table 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_24Table 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_25Table 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_26Table 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_27Table 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_28Table 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_29Table 2-1. Operator/Crew Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_30Section Ill. OPERATION UNDER USUAL CONDITIONSASSEMBLY AND PREPARATION FOR USEASSEMBLY AND PREPARATION FOR USE CONT.ASSEMBLY AND PREPARATION FOR USE CONT.GENERAL OPERATING PROCEDURESGENERAL OPERATING PROCEDURES CONT. - TM-9-4520-251-14_36GENERAL OPERATING PROCEDURES CONT. - TM-9-4520-251-14_37GENERAL OPERATING PROCEDURES CONT. - TM-9-4520-251-14_38INFORMATION PLATESINFORMATION PLATES CONT.INFORMATION PLATES CONT.Section IV. OPERATION UNDER UNUSUAL CONDITIONS - TM-9-4520-251-14_42OPERATION IN EXTREME COLDOPERATION IN EXTREME COLD CONT.Chapter 3 OPERATOR MAINTENANCE INSTRUCTIONSTable 3-1. Operator/Crew Troubleshooting - Continued - TM-9-4520-251-14_46Table 3-1. Operator/Crew Troubleshooting - Continued - TM-9-4520-251-14_47Table 3-1. Operator/Crew Troubleshooting - Continued - TM-9-4520-251-14_48Table 3-1. Operator/Crew Troubleshooting - Continued - TM-9-4520-251-14_49Chapter 4 UNIT MAINTENANCE INSTRUCTIONSUNPACKING - TM-9-4520-251-14_51INSTALLATION SITE PREPARATIONINSTALLATION SITE PREPARATION CONT.INSTALLATION SITE PREPARATION CONT. - TM-9-4520-251-14_54INSTALLATION SITE PREPARATION CONT. - TM-9-4520-251-14_55INSTALLATION OF BRAKE ADAPTER KITINSTALLATION OF BRAKE ADAPTER KIT CONT.Section Ill. LUBRICATIONWHEEL BEARINGSPREVENTIVE MAINTENANCE CHECKS AND SERVICES - TM-9-4520-251-14_60Table 4-1. Unit Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_61Table 4-1. Unit Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_62Table 4-1. Unit Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_63Table 4-1. Unit Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_64Table 4-1. Unit Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_65Table 4-1. Unit Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_66Table 4-1. Unit Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_67Table 4-1. Unit Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_68Table 4-1. Unit Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_69Table 4-1. Unit Preventive Maintenance Checks and Services - Continued - TM-9-4520-251-14_70Section V. TROUBLESHOOTINGTable 4-2. Unit Maintenance Troubleshooting - Continued - TM-9-4520-251-14_72Table 4-2. Unit Maintenance Troubleshooting - Continued - TM-9-4520-251-14_73Table 4-2. Unit Maintenance Troubleshooting - Continued - TM-9-4520-251-14_74Table 4-2. Unit Maintenance Troubleshooting - Continued - TM-9-4520-251-14_75Table 4-2. Unit Maintenance Troubleshooting - Continued - TM-9-4520-251-14_76Table 4-2. Unit Maintenance Troubleshooting - Continued - TM-9-4520-251-14_77Table 4-2. Unit Maintenance Troubleshooting - Continued - TM-9-4520-251-14_78Table 4-2. Unit Maintenance Troubleshooting - Continued - TM-9-4520-251-14_79Table 4-2. Unit Maintenance Troubleshooting - Continued - TM-9-4520-251-14_80Table 4-2. Unit Maintenance Troubleshooting - Continued - TM-9-4520-251-14_81Table 4-2. Unit Maintenance Troubleshooting - Continued - TM-9-4520-251-14_82Table 4-2. Unit Maintenance Troubleshooting - Continued - TM-9-4520-251-14_83Section VI. MAINTENANCE PROCEDURESSection VI. MAINTENANCE PROCEDURES CONT.GENERAL INSTRUCTIONSAIR DUCT HOSES AND ADAPTERAIR DUCT HOSES AND ADAPTER (CONT) - TM-9-4520-251-14_88AIR DUCT HOSES AND ADAPTER (CONT) - TM-9-4520-251-14_89OUTLET COVER, SUPPORT HANDLES, AND EXHAUST STACKOUTLET COVER, SUPPORT HANDLES, AND EXHAUST STACK (CONT)FRONT HALF HOODNOISE BAFFLENOISE BAFFLE (CONT)ACCESS DOOR BULKHEAD HALF HOODBULKHEAD HALF HOOD (CONT) ENGINE ASSEMBLYENGINE ASSEMBLY (CONT)ENGINE SUPPORTCOUPLINGCOUPLING (CONT) - TM-9-4520-251-14_102COUPLING (CONT) - TM-9-4520-251-14_103EXHAUST HOSEMUFFLERPREHEATERPREHEATER (CONT)PREHEATER (CONT) - TM-9-4520-251-14_108PREHEATER (CONT) - TM-9-4520-251-14_109AIR FILTERAIR FILTER (CONT)RESTRICTION INDICATORRESTRICTION INDICATOR (CONT) - TM-9-4520-251-14_113RESTRICTION INDICATOR (CONT) - TM-9-4520-251-14_114ENGINE - TM-9-4520-251-14_115ENGINE (CONT) - TM-9-4520-251-14_116ENGINE (CONT) - TM-9-4520-251-14_117CARBURETOR - TM-9-4520-251-14_118CARBURETOR (CONT) - TM-9-4520-251-14_119CARBURETOR (CONT) - TM-9-4520-251-14_120CARBURETOR (CONT) - TM-9-4520-251-14_121CARBURETOR (CONT) - TM-9-4520-251-14_122CHOKEGOVERNOR - TM-9-4520-251-14_124GOVERNOR (CONT)BLOWER HOUSINGSPARK PLUGSPARK PLUG (CONT)FLYWHEELFLYWHEEL (CONT)BREATHERBREATHER (CONT) - TM-9-4520-251-14_132BREATHER (CONT) - TM-9-4520-251-14_133PRIMER PUMPPRIMER PUMP (CONT) - TM-9-4520-251-14_135PRIMER PUMP (CONT) - TM-9-4520-251-14_136HOSES (FUEL)HOSES (FUEL) (CONT)FUEL LINES AND FITTINGSFUEL LINES AND FITTINGS (CONT)FUEL PUMPFUEL PUMP (CONT) - TM-9-4520-251-14_142FUEL PUMP (CONT) - TM-9-4520-251-14_143FUEL PUMP (CONT) - TM-9-4520-251-14_144FUEL PUMP (CONT) - TM-9-4520-251-14_145FUEL PUMP (CONT) - TM-9-4520-251-14_146FUEL PUMP (CONT) - TM-9-4520-251-14_147FUEL PUMP (CONT) - TM-9-4520-251-14_148DRIVE BELTDRIVE BELT (CONT)GASOLINE FILTERGASOLINE FILTER (CONT)CONTROLS AND INSTRUMENTS TUBING AND FITTINGSFUEL CONRTOL VALVE, TEMP. SELECTOR, FUE CONTROL BLOCK AND CHECK VALVEFUEL CONTROL VALVE, TEMP. SELECTOR, FUEL CONTROL BLOCK AND CHECK VALVE (CONT) - TM-9-4520-251-14_155FUEL CONTROL VALVE, TEMP. SELECTOR, FUEL CONTROL BLOCK AND CHECK VALVE (CONT) - TM-9-4520-251-14_156FUEL CONTROL VALVE, TEMP. SELECTOR, FUEL CONTROL BLOCK AND CHECK VALVE (CONT) - TM-9-4520-251-14_157FUEL CONTROL VALVE, TEMP. SELECTOR, FUEL CONTROL BLOCK AND CHECK VALVE (CONT) - TM-9-4520-251-14_158FUEL CONTROL VALVE, TEMP. SELECTOR, FUEL CONTROL BLOCK AND CHECK VALVE (CONT) - TM-9-4520-251-14_159FUEL CONTROL VALVE, TEMP. SELECTOR, FUEL CONTROL BLOCK AND CHECK VALVE (CONT) - TM-9-4520-251-14_160CHECK VALVE - TM-9-4520-251-14_161CHECK VALVE (CONT) - TM-9-4520-251-14_162DISCHARGE TEMPERATURE GAUGEDISCHARGE TEMPERATURE GAUGE (CONT)IGNITION ASSEMBLYIGNITION ASSEMBLY (CONT) - TM-9-4520-251-14_166IGNITION ASSEMBLY (CONT) - TM-9-4520-251-14_167IGNITION ASSEMBLY (CONT) - TM-9-4520-251-14_168IGNITION ASSEMBLY (CONT) - TM-9-4520-251-14_169IGNITION CABLEIGNITION CABLE (CONT)FAN GUARDSFAN GUARDS (CONT)VANE ASSEMBLYVANE ASSEMBLY (CONT)VANEAXIAL FANVANEAXIAL FAN (CONT)FAN BEARING - TM-9-4520-251-14_178FAN BEARING (CONT)FAN RINGGENERATOR EXHAUST STACK AND SPARK ARRESTORGENERATOR EXHAUST STACK AND SPARK ARRESTOR (CONT) - TM-9-4520-251-14_182GENERATOR EXHAUST STACK AND SPARK ARRESTOR (CONT) - TM-9-4520-251-14_183DAMPER CONTROL AND SHUTTER ASSEMBLYDAMPER CONTROL AND SHUTTER ASSEMBLY (CONT)TUBING AND FITTINGSTUBING AND FITTINGS (CONT)CHECK VALVE - TM-9-4520-251-14_188CHECK VALVE (CONT) - TM-9-4520-251-14_189IGNITER - TM-9-4520-251-14_190 IGNITER (CONT) - TM-9-4520-251-14_191 IGNITER (CONT) - TM-9-4520-251-14_192NOZZLE AND NOZZLE ADAPTER ASSEMBLYNOZZLE AND NOZZLE ADAPTER ASSEMBLY (CONT) NOZZLE AND NOZZLE ADAPTER ASSEMBLY (CONT) COMBUSTORCOMBUSTOR (CONT)HEAT EXCHANGER AND HEAT EXCHANGER CASEHEAT EXCHANGER AND HEAT EXCHANGER CASE (CONT) INFORMATION PLATES INFORMATION PLATES (CONT) - TM-9-4520-251-14_201 INFORMATION PLATES (CONT) - TM-9-4520-251-14_202DRAINCOCK (FUEL TANK)FUEL GAUGECAP AND STRAINER (FUEL)FUEL TANK WHEELS, TIRES, AND TUBES WHEELS, TIRES, AND TUBES (CONT)WHEEL HUBS AND BEARINGS WHEEL HUBS AND BEARINGS (CONT) - TM-9-4520-251-14_210 WHEEL HUBS AND BEARINGS (CONT) - TM-9-4520-251-14_211AXLE - TM-9-4520-251-14_212 BRAKES BRAKES (CONT)MAINTENANCE CASESection VIl. PREPARATION FOR STORAGE OR SHIPMENTChapter 5 DIRECT SUPPORT MAINTENANCE INSTRUCTIONSGENERAL INSTRUCTIONSFRONT HALF HOOD, ACCESS DOOR, AND BULKHEAD HALF HOODFRONT HALF HOOD, ACCESS DOOR, AND BULKHEAD HALF HOOD (CONT)ENGINE - TM-9-4520-251-14_221CARBURETOR - TM-9-4520-251-14_222CARBURETOR (CONT) C H O KE CHOKE (CONT)GOVERNOR - TM-9-4520-251-14_226 GOVERNOR (CONT)ENGINE IGNITIONENGINE IGNITION (CONT) - TM-9-4520-251-14_229ENGINE IGNITION (CONT) - TM-9-4520-251-14_230ALTERNATOR STATORALTERNATOR STATOR (CONT) - TM-9-4520-251-14_232ALTERNATOR STATOR (CONT) - TM-9-4520-251-14_233PISTON AND CONNECTING ROD ASSEMBLYPISTON AND CONNECTING ROD ASSEMBLY (CONT) - TM-9-4520-251-14_235PISTON AND CONNECTING ROD ASSEMBLY (CONT) - TM-9-4520-251-14_236PISTON AND CONNECTING ROD ASSEMBLY (CONT) - TM-9-4520-251-14_237MAIN BEARINGSMAIN BEARINGS (CONT) MAIN BEARINGS (CONT)CRANKSHAFT AND CAM GEARCRANKSHAFT AND CAM GEAR (CONT) - TM-9-4520-251-14_242CRANKSHAFT AND CAM GEAR (CONT) - TM-9-4520-251-14_243VALVES AND TAPPETSVALVES AND TAPPETS (CONT) - TM-9-4520-251-14_245VALVES AND TAPPETS (CONT) - TM-9-4520-251-14_246VALVES AND TAPPETS (CONT) - TM-9-4520-251-14_247VALVES AND TAPPETS (CONT) - TM-9-4520-251-14_248CYLINDER HEAD, CRANKCASE COVER, AND CYLINDER ASSEMBLYCYLINDER HEAD, CRANKCASE COVER, AND CYLINDER ASSEMBLY (CONT) - TM-9-4520-251-14_250CYLINDER HEAD, CRANKCASE COVER, AND CYLINDER ASSEMBLY (CONT) - TM-9-4520-251-14_251FAN BEARING - TM-9-4520-251-14_252 FAN BEARING (CONT) HEAT EXCHANGER HEAT EXCHANGER (CONT)HEAT EXCHANGER CASE, BULKHEAD, AND COVER PLATE HEAT EXCHANGER CASE, BULKHEAD, AND COVER PLATE (CONT)SUPPORTS SUPPORTS (CONT)FUEL TANK - TM-9-4520-251-14_260 FUEL TANK (CONT) - TM-9-4520-251-14_261 FUEL TANK (CONT) - TM-9-4520-251-14_262 FUEL TANK (CONT) - TM-9-4520-251-14_263AXLE - TM-9-4520-251-14_264Axle (CONT) - TM-9-4520-251-14_265Axle (CONT) - TM-9-4520-251-14_266Axle (CONT) - TM-9-4520-251-14_267Chapter 6 GENERAL SUPPORT MAINTENANCE INSTRUCTIONSENGINE - TM-9-4520-251-14_269ENGINE (CONT) - TM-9-4520-251-14_270VALVES, VALVE SEATS, AND GUIDEVALVES, VALVE SEATS, AND GUIDE (CONT) - TM-9-4520-251-14_272VALVES, VALVE SEATS, AND GUIDE (CONT) - TM-9-4520-251-14_273VALVES, VALVE SEATS, AND GUIDE (CONT) - TM-9-4520-251-14_274VALVES, VALVE SEATS, AND GUIDE (CONT) - TM-9-4520-251-14_275CRANKCASE COVER AND CYLINDER ASSEMBLYCRANKCASE COVER AND CYLINDER ASSEMBLY (CONT) - TM-9-4520-251-14_277CRANKCASE COVER AND CYLINDER ASSEMBLY (CONT) - TM-9-4520-251-14_278CRANKCASE COVER AND CYLINDER ASSEMBLY (CONT) - TM-9-4520-251-14_279CRANKCASE COVER AND CYLINDER ASSEMBLY (CONT) - TM-9-4520-251-14_280CRANKCASE COVER AND CYLINDER ASSEMBLY (CONT) - TM-9-4520-251-14_281FUEL TANK - TM-9-4520-251-14_282FRAMEFRAME (CONT)Appendix A. REFERENCESAppendix B. MAINTENANCE ALLOCATION CHARTEXPLANATION OF COLUMNS IN THE MAC - TM-9-4520-251-14_287Section Il. MAINTENANCE ALLOCATION CHART - TM-9-4520-251-14_288Section Il. MAINTENANCE ALLOCATION CHART - ContinuedSection Il. MAINTENANCE ALLOCATION CHART - Continued - TM-9-4520-251-14_290Section Il. MAINTENANCE ALLOCATION CHART - Continued - TM-9-4520-251-14_291Section Il. MAINTENANCE ALLOCATION CHART - Continued - TM-9-4520-251-14_292Section Il. MAINTENANCE ALLOCATION CHART - Continued - TM-9-4520-251-14_293Section Il. MAINTENANCE ALLOCATION CHART - Continued - TM-9-4520-251-14_294Section III. TOOL AND TEST EQUIPMENT REQUIREMENTSAppendix C. COMPONENTS OF END ITEM (COEI) AND BASIC ISSUE ITEMS (Bll) LISTSSection II. COMPONENTS OF END ITEMSection Ill. BASIC ISSUE ITEMSAppendix D. ADDITIONAL AUTHORIZATION LISTAppendix E. EXPENDABLE SUPPLIES AND MATERIALS LISTSection Il. EXPENDABLE SUPPLIES AND MATERIALS LIST - TM-9-4520-251-14_301GLOSSARY - TM-9-4520-251-14_302GLOSSARY CONT. - TM-9-4520-251-14_303GLOSSARY CONT. - TM-9-4520-251-14_304GLOSSARY CONT. - TM-9-4520-251-14_305I N D E X