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TM 10-4320-351-14
CHAPTER 4
UNIT MAINTENANCE
Section I.
Lubrication Instructions .................................................................................................................... 4-2
4.1
Lubrication ............................................................................................................................................ 4-2
Section II.
Service upon Receipt ....................................................................................................................... 4-2
4.2
Unpacking ............................................................................................................................................. 4-2
4.3
Inspection ............................................................................................................................................. 4-2
4.4
Engine Service ..................................................................................................................................... 4-2
Section III.
Unit Preventive Maintenance Checks and Services (PMCS)............................................................... 4-3
4.5
General ................................................................................................................................................. 4-3
4.6
Leakage Criteria .................................................................................................................................... 4-4
4.7
PMCS Procedures ................................................................................................................................. 4-4
Section IV.
Unit Troubleshooting Procedures ...................................................................................................... 4-7
4.8
Troubleshooting..................................................................................................................................... 4-7
Section V.
Unit Maintenance Procedures ........................................................................................................... 4-9
4.9
Pump-Engine Module Maintenance......................................................................................................... 4-9
4.9.1
Replace Engine Fuel Filter...................................................................................................................... 4-9
4.9.2
Replace Pumpage Overtemperature Sensor/Sensor Cable (W103)......................................................... 4-11
4.9.3
Replace Engine Air Filter Element ........................................................................................................ 4-12
4.9.4
Replace Engine Air Filter Hose ............................................................................................................. 4-13
4.10
Repair Inlet Manifold Assembly............................................................................................................. 4-15
4.10.1
Replace Outlet O-Ring ......................................................................................................................... 4-15
4.10.2
Replace Two-Inch Valved Unisex Coupling............................................................................................ 4-16
4.11
Flange Mounted Three-inch Unisex Coupling Maintenance..................................................................... 4-19
4.11.1
Replace Flange Mounted Three-Inch Unisex Coupling O-Ring................................................................ 4-19
4.11.2
Replace Flange Mounted Three-Inch Unisex Coupling.. ......................................................................... 4-20
4.12
Fuel Transfer Pump Maintenance ......................................................................................................... 4-22
4.12.1
Replace Fuel Transfer Pump................................................................................................................ 4-22
4.12.2
Replace Fuel Transfer Pump Discharge Housing O-Ring........................................................................ 4-24
4.12.3
Replace Fuel Transfer Pump Discharge Valve ....................................................................................... 4-26
4.13
Engine Module Maintenance................................................................................................................. 4-27
4.13.1
Replace Carrying Handle...................................................................................................................... 4-27
4.13.2
Replace Pulley Guard ......................................................................................................................... 4-28
4.13.3
Replace Engine Module Alignment Bolt ................................................................................................ 4-29
4.13.4
Replace Cable Assembly W101............................................................................................................ 4-30
4.14
Engine Assembly Maintenance............................................................................................................. 4-32
4.14.1
Replace Starter.................................................................................................................................... 4-32
4.14.2
Replace Fuel Pump.............................................................................................................................. 4-34
4.14.3
Adjust Valves....................................................................................................................................... 4-36
4.14.4
Clean Fuel Injector Nozzle.................................................................................................................... 4-37
4.14.5
Replace Exhaust Manifold ................................................................................................................... 4-41
4-1
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