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 TM 55-1905-223-24-1
(1) Remove machine bolts (20 and 24) and lockwashers (19 and 25).
NOTE
The clearance between the bore in the cover and the compound
gear is small. There will be some resistance until the retainer
moves from the bore.
(2) Pull access cover (18) straight away from oil pump body (31).
(3) Remove hexagon head capscrew (23), shaft retainer (22) and thrust bearing (21) from center of
large gear (17).
(4) Pull large gear (17) and thrust bearing (15) from idler shaft (14).
NOTE
If idler shaft does not lift from bore in pump body and shaft is
within specifications, it is not necessary to remove idler shaft.
(5) Remove hexagon head capscrews (35) and lockwashers (34) from oil pump cover (33).
(6) Separate pump cover (33) from pump body (31).
(7) Remove gear and shaft (12) and bushing (11 and 13) from pump body (31).
(8) Using hydraulic press with a mandrel that is smaller than the bore in the drive gear (26), press gear
and shaft (12) out of drive gear (26) and pump body (31).
REPAIR
a. Use solvent to clean all parts. Inspect all parts for evidence of wear or oher damage, and make sure
t
the housing and cover oil passages are free of obstructions.
b. Check the body (31) and covers (18 and 33) for scratch or abrasion damage. If the marks on either
part may be felt with a finger nail, replace the part.
c. Measure the inside diameter of the bushings (11 and 13). The minimum is:1.5025 inch (38.164 mm),
and the maximum is: 1.5050 inch (38.227 mm). If the bushings fail to meet the specifications, replace
the body or cover.
d. Measure the inner diameter of the idler shaft (14) bore in the body (31). The minimum is: 0.999 inch
(25.37 mm), and the maximum is: 1.001 inch (25.43 mm). If the bore fails to meet the specifications
the body must be replaced.
3-66
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