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 TM 55-1905-220-14-10
5-42. LUBE OIL PUMP-MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
INSPECTION
Wear eye goggles for protection when using compressed air.
2.
a. Wash all parts in clean fuel oil and dry them with compressed air.
b. Examine the gear cavity in the pump body and the drive shaft
bushings. If the driven gear bushings are worn, replace the
bushings. Service replacement bushings in the driven gears
must be reamed after assembly. Bushings used with the .499
inch diameter driven gear shaft must be reamed to .500 inch
.0005 inch and bushings used with the .623 inch diameter shaft
must be reamed to .625 inch .0005 inch.
c. Inspect the bushings in the pump body and cover. If the
bushings are worn excessively, replace the pump and cover
assemblies unless suitable boring equipment is available for
finishing the new bushings. When installing new bushings,
replace all of the bushings. The bushings must be located
and positioned as shown. Also, the gear bore and the
bushing bore in both the pump body and cover must be
concentric within .001 inch. The shaft- to-pump body-
bushing clearance with new parts is .0008 inch to .0025
inch. The shaft-to-pump cover bushing clearance with new
parts is .0010 inch to .0027 inch.
5-618
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