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 TM 55-1905-220-14-10
5-16. LUBE OIL PUMP - MAINTENANCE INSTRUCTIONS.
LOCATION
ITEM
ACTION
REMARKS
INSPECTION
2.
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 comparatively
short period of time. Proper servicing of oil filters
will increase the life of the gears.
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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