TM 5-4310-379-14
3-27. Fuel Pump and Drive
This task covers:
a.
Test
b.
Replace
INITIAL SETUP:
Tools
Materials/Parts
General Mechanic's Tool Kit (NSN 5180-00-177-7033)
Drive, Fuel Pump
Wrench, Torque (NSN 5120-00-554-7292)
Fuel Pump
Gasket, Fuel Pump Mounting
Gasket, Fuel Pump Drive Mounting
Teflon Tape (Item 25, Appendix D)
a.
Test. (figure 3-29)
(1)
Loosen fitting nut (1) and remove fuel return line (2).
(2)
Place fuel return line (2) in suitable container.
(3)
Start engine (para. 2-6) and run at 1200 rpm.
(4)
Fuel flow should be 0.5 gallons per min.
(5)
Stop engine (para. 2-7).
(6)
If fuel flow is not as specified, replace fuel pump.
NOTE
Leave 1 1/2 threads exposed when applying teflon tape. Wrap teflon tape in the direction that will
not unwrap as fitting is tightened. Failure to wrap teflon tape properly or having it extend past the
end of the fitting may cause a blockage in the fuel system.
(7)
Apply teflon tape to threads on fitting nut (1).
(8)
Install fuel return line (2) and tighten fitting nut (1).
3-78
