TM 5-4320-300-14
6-6. OIL PUMP (CONT)
Location/item
Action
Remarks
18. Oil pressure
Check that valves move freely in bores in
regulator and
engine lower front cover. If a valve sticks
oil cooler
slightly, remove roughness with P-C-458
bypass valves
crocus cloth. Inspect plug and spring for
excessive wear or other damage.
REPAIR
19. Pump rotors,
If the lobes and faces of the rotors have deep
body, and
scratches or burrs, replace rotors as a matched
cover plate
set. If the pump body and cover plate are
deeply scored, replace them.
NOTE
Minor scratches on the pump rotors, body, or cover plate may be removed with P-C-1673 emery
cloth.
20. Inner rotor
If splines are excessively worn, replace both rotors
and oil pump
(matched set), and replace the drive gear.
drive gear
splines
21. Oil pressure
If after polishing with crocus cloth, valves do
regulator and
not move freely in bores in engine lower front
oil cooler by-
cover, replace the valves. If plugs or springs are
pass valves
excessively worn or damaged, replace them.
REASSEMBLY
22. Flange
Install flange over pipe
end, seal face out.
Lubricate new seal ring
with MIL-L-2104 oil
and place against
flange seal face.
23. Screen
Install new gasket
over studs on back
of screen. Join screen
to bracket on end of
pipe and secure with
two nuts.
6-21
