ARMY TM 9-6115-604-12
NAVY NAVFAC P-8-633-12
Turn FUEL PUMP switch S8 to HAND. Tank should fill and level switch should shut off pump in
approximately 10 to 13 minutes. If tank does not fill in 10 to 12 minutes, investigate cause. Check for too
much negative head to pump, faulty solenoid, dirty strainer or filters, and defective pump coupling.
Turn FUEL PUMP switch S8 to AUTO. Set fuel transfer pump circuit breaker CB121 to OFF.
Tag and disconnect wires from fuel transfer pump motor.
Using a multimeter set to RX1 scale, perform a continuity check of the motor. Meter should read
continuity across windings.
Remove. See Figure 4-38.
Turn FUEL PUMP switch S8 to OFF.
Remove screw and captive washer assemblies (4) and nut and captive washer assemblies (5).
Lift off coupling shield (6).
Loosen setscrews In pump to motor coupling (7).
Disconnect hose assemblies (pump output and pump input) (1 and 3) from pipe to elbow fitting (2).
Remove hexagon head capscrews (8), lockwashers (10), and hexagonal nuts (9).
Slide pump shaft out of pump to coupling (7) and let fuel transfer pump assembly (11 ) free.
Tag and disconnect wires from motor.
Remove bolts (22), lockwashers (23), flat washers (24), and nuts that secure motor (18) to bracket (12)
and remove motor.
Install. See figure 4-38
Position pump base on fuel pump bracket (12), siding shaft Into pump to motor coupling (7). Adjust pump
housing position to align shaft with the coupling and the keyway with the locking setscrew. Do not secure
setscrew at this stage.
Install hexagon head capscrews (8), lockwashers (10), and secure fuel transfer pump assembly (11) with
hexagonal nuts (9).
Secure hose assembly (pump input) (3) to inlet port of pump.
Secure hose assembly (pump output) (1) to outlet port of pump.
Install motor Align motor to pump using shims (26) under motor mounts. Secure motor to base with bolts,
washers, and nuts.
Secure pump to motor coupling (7) setscrew in keyway of pump shaft.
Replace coupling shield (6) and secure with screw and captive washer assemblies (4) and nut and captive
washer assemblies (5).