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TM 55-2915-335-30&P
2-25. FUEL BOOST PUMP/CARTRIDGE - FINAL TEST (Cont)
2-25
6. REMOVE PUMP FROM TEST TANK
a. Assembled Cartridge and Housing.
(1)
(2)
(3)
(4)
Drain test tank.
Remove plug from cartridge drain port and drain fluid from pump. Hold pump cover with wrench to keep
it from turning.
Disconnect DC power supply from pump.
Remove pump from test tank and disconnect fuel discharge line.
b. Boost Pump Cartridge.
Apply pressure directly over valve spring when opening or closing
valve stem assembly. Trying to compress valve spring from free end
of valve arm will cause valve arm to bend. When removing or install-
ing shoulder screw, keep valve arm depressed.
(1) Remove drain plug from cartridge pump
cover and drain fluid from pump.
(2) Disconnect power supply from boost pump.
(3) Place thumb on inlet valve stem (15), above
spring. Press valve stem in toward pump
housing.
(4) Unscrew shoulder screw (14). Rotate inlet
valve stem (15) away from pump cartridge.
(5) Using a small screwdriver, pry end of retain-
ing ring (3) from seat in pump housing.
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