TM 9-6115-670-14&P B-9 Section IV.  REMARKS FOR AUXILIARY POWER UNIT, 10 KW, 120/240 VAC, 60 HZ MEP-903A, MEP-903B AND MEP-903C REFERENCE CODE REMARKS A PERFORM PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS). B UNIT LEVEL REPAIR LIMITED TO REPLACEMENT OF LINES, FITTINGS, RELIEF VALVE, OIL COOLER AND DIP STICK. C UNIT LEVEL INSPECTION LIMITED TO CHECKING OIL LEVEL. D UNIT LEVEL REPAIR LIMITED TO REPLACEMENT OF HOSES AND THERMOSTAT. E DIRECT SUPPORT REPAIR LIMITED TO REPLACEMENT OF WATER PUMP. F UNIT REPAIR LIMITED TO REPLACEMENT OF LINES, FITTINGS, FEEDER PUMP, FUEL FILTER, AND TRANSFER PUMP. G DIRECT SUPPORT REPAIR LIMITED TO REPLACEMENT OF INJECTION PUMP AND INJECTION NOZZLES. H REPAIR LIMITED TO REPLACEMENT OF LOW FUEL CUT-OFF SWITCH. I DIRECT SUPPORT ADJUSTMENT LIMITED TO REPLACEMENT OF ADJUSTING WASHER IN NOZZLE HOLDER ASSEMBLIES. J REPAIR LIMITED TO REPLACEMENT OF ALTERNATOR, TEMPERATURE SWITCH, TEMPERATURE SENDER, STARTER, AND LOW OIL PRESSURE SWITCH. K SERVICE BY REPLACING GLOW PLUGS. L REPAIR SPEED SENSOR BY REPLACING TERMINAL LUGS. M TEST AS PART OF TROUBLESHOOTING PROCEDURES. N REPLACE SEALING CAPS IF NECESSARY. O REPAIR GOVERNOR CONTROL ASSEMBLY BY REPLACING TERMINAL LUGS AND CONNECTORS. P REPAIR FUEL PUMP BY REPLACING TERMINAL LUGS AND CONNECTORS. Q INSPECT COMPONENTS FOR WEAR, FRAYING, CRACKS, SPLITS, SPLINTERING, ETC. R ADJUST FAN BELT. S DIRECT SUPPORT LEVEL REPAIR LIMITED TO REPLACEMENT OF RELAY BOARD, AUTOMATIC VOLTAGE REGULATOR, OVERLOAD RELAY, AND 24 VDC CONTACTOR. T GENERAL SUPPORT REPAIR LIMITED TO REPLACEMENT OF EXCITER STATOR AND ROTOR. U REPAIR LIMITED TO REPLACEMENT OF METERS, GAUGES, SWITCHES, AND LAMPS. V GENERAL SUPPORT REPAIR INCLUDES TESTING AND REPLACEMENT OF PISTONS, CRANKSHAFT, CAMSHAFT, GEARS, ROCKER ARM ASSEMBLY COMPONENTS, AND VALVES. W GENERAL SUPPORT LEVEL REPAIR INCLUDES REPLACEMENT OF OIL PUMP. X PERFORM CONTINUITY CHECKS. Y TEST ENGINE COMPRESSION PRESSURE. Z REPAIR BY REPLACEMENT OR REPAIR OF COMPONENTS. AA GENERAL SUPPORT LEVEL TEST INCLUDES TESTING OF PISTONS, CRANKSHAFT, CAMSHAFT, FUEL CAMSHAFT, AND GEARS. AB REPAIR BY REPLACING GASKETS. AC VISUAL AND MECHANICAL INSPECTION OF UNIT/ASSY FOR DAMAGE, CRACKS, CORROSION, LOOSE OR MISSING HARDWARE, ETC. AD REPAIR BY REPLACING DIODES.   AE INSPECT VARISTOR FOR DETERIORATION. AF UNIT LEVEL SERVICE INCLUDES BLEEDING FUEL SYSTEM. AG DIRECT SUPPORT REPAIR LIMITED TO REPLACEMENT OF OIL PAN, OIL PAN COVER AND OIL STRAINER.