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 TM 55-1905-222-14
5-23
REPAIR RAMP WINCH HYDRAULIC MOTOR (Continued).
d.
Inspect the gear hubs for excessive
wear at bearing points. if wear
exceeds 0.001 inch on the hub
diameter, the gears should be
replaced. Replace gears in sets
since they are matched at the time of
manufacture.
e.
Inspect the machined surfaces of the
port end cover, shaft end cover and
gear housing for roughness. Stone
to remove roughness. Replace if
roughness is excessive.
f.
Measure the gear housing bore and
replace if the radial wear is in excess
of 0.006.
A new gear housing
measures 2.0025 inch in the small
bores and 3.7525 inch in the large
bore.
g.
Inspect thrust plates for erosion or
excessive wear on the running
surfaces. Replace if necessary.
h.
Rewash all parts that have been
stoned and dry thoroughly.
i.
Inspect
shaft
for
distortion.
Repair/replace as necessary.
NOTE
If either the gears (13) or needle bearings (27) are replaced because
of excessive wear, it is good practice to replace both the gears and
bearings. Replacement of one part and not the other will cause
premature wear of the new part because of its attempt to conform to
replaced due to excessive wear, carefully check the side of the gear
housing bore which has most wear. In most cases the gear housing
will also have to be replaced along with the gears and bearings.
5-58
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