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TM 10-4320-351-14
CHAPTER 5
DIRECT SUPPORT MAINTENANCE
Section I.
Direct Support Troubleshooting Procedures.................................................................................
5-1
5.1
Introduction ....................................................................................................................................
5-1
5.2
Electrical System Malfunctions..........................................................................................................
5-3
5.3
Pumping Assembly Principles Of Operation.......................................................................................
5-3
Section II.
Direct Support Maintenance Procedures .....................................................................................
5-7
5.4
Repair of Fuel Transfer Pump...........................................................................................................
5-7
5.4.1
Replace Fuel Transfer Pump Inlet O-Ring..........................................................................................
5-7
5.4.2
Replace Fuel Transfer Pump Shaft Seal Assembly/O-Rings .5-...........................................................
5-9
5.4.3
Replace Fuel Transfer Pump Vane Pump Housing O-Rings ..............................................................
5-12
5.4.4
Repair of Rotary Vane Pump...........................................................................................................
5-15
5.4.5
Replace Fuel Transfer Pump Impeller-Shaft Assembly......................................................................
5-17
5.5
Repair Theee-Inch Valved Unisex Coupling......................................................................................
5-19
5.6
Repair Two-Inch Valved Unisex Coupling .........................................................................................
5-23
5.7
Repair of Control Box .....................................................................................................................
5-26
5.7.1
Replace Control Panel Lamp Assemblies/Panel Lights......................................................................
5-27
5.7.2
Replace Panel Lights Dimmer Potentiometer R1...............................................................................
5-29
5.7.3
Repair Emergency Stop Switch (S4) ................................................................................................
5-31
5.7.4
Replace Control Panel Toggle Switches ...........................................................................................
5-33
5.7.5
Replace Capacitor C1 .....................................................................................................................
5-35
5.7.6
Replace Circuit Breakers CB1 or CB2 ..............................................................................................
5-37
5.7.7
Replace Relay K1...........................................................................................................................
5-39
5.7.8
Replace Voltage Regulator ..............................................................................................................
5-40
Section I. DIRECT SUPPORT TROUBLESHOOTING PROCEDURES
5.1
INTRODUCTION.
The troubleshooting procedures provided in this chapter assume that unit troubleshooting has been performed
unsuccessfully. To repeat unit level troubleshooting, refer to chapter 4, section IV.
Troubleshooting table 5-1 cannot list all malfunctions that may occur, all the tests and inspections needed to find the fault,
or all the corrective actions needed to correct the fault.
5-1
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