TM 55-1930-209-14&P-21
Section XXIV. Winch Head Drive and Guide Removal, Inspection, Repair and Installation
5-95
General. The winch head drive assembly can be removed, repaired and replaced independently from the
rest of the winch drive mechanism.
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Winch head assembly removal
a.
Refer to Figure 5-48 and remove winch head gear guard.
b.
Remove winch head shaft pillow block mounting bolts and lock washers.
c.
Lift winch head shaft with the pillow blocks attached from winch frame. Move assembly to a suitable
maintenance area before further disassembly.
CAUTION
Do not attempt disassembly of the pillow blocks at the work site. Dust and dirt can enter the
bearings which will cause excessive wear and premature bearing failure.
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Winch head disassembly inspection and repair
a.
Mark pillow blocks and bearings by location on shaft.
b.
Remove Gib keys inside winch heads.
NOTE
If Gib keys cannot be removed by pulling on the tab at end of the key, use a drift and tap them
loose from inside. Use care to avoid damaging winch head and shaft key ways.
c.
Pull winch heads off shaft.
d.
Remove drive gear locking collar and pull gear off the shaft. Remove inner gear locking collar.
e.
Remove bearing retainers from each pillow block.
f.
Pull pillow blocks off the bearings.
g.
Remove bearings with a suitable puller.
h.
Wash all parts in a suitable cleaning solvent and dry thoroughly.
i.
Inspect shaft for signs of scoring, excessive wear and chipped spline teeth.
j.
Inspect bearing faces of pillow blocks for signs of scoring.
CAUTION
If either the shaft or pillow block bearing surfaces show evidence of scoring, replace the
associated bearing. Scoring of the bearing face indicates actual or impending bearing failure.
Bearing failure under operational loads can seriously damage winch components.
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