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 TM 55-1905-219-14-10
5-16. LUBE OIL PUMP - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION
2.
WARNING
Wear protective eye goggles when using compressed air.
a. Wash all of the parts in clean
fuel oil and dry them with
compressed air.
b. The greatest amount of wear in
the oil pump is imposed on the
internal drive and driven gears.
This wear may be kept to a minimum
by keeping the lubricating oil
clean and acid-free. If dirt and
sludge are allowed to accumulate in
the lubricating system, pronounced
gear wear may occur in a compara-
tively short period of time.
Proper servicing of oil filters
will increase the life of the
c.
Examine the internal gear cavity of
the pump body for wear or scoring.
Also inspect the pump cover for
wear. Replace the parts if
necessary.
d. Inspect the bushings in the pump
body and cover. If the bushings
are worn excessively, replace the
pump body and cover unless suitable
boring equipment is available for
finishing the new bushings. When
installing new bushings, replace
all of the bushings in the pump.
The bushings must be located and
positioned as shown below. The
gear bore and the bushing bore must
be concentric within .002" total
indicator reading. The shaft-to-
bushing clearance with new parts is
.0015" to .0032".
5-302
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