TM 55-1930-209-14&P-21
5-89
Drive shaft inspection and repair
a.
Cleaning. Thoroughly clean all parts in a suitable solvent and dry thoroughly. Do not immerse parts in solvent
since bearing surfaces and other highly machined parts could be damaged if they are banged together.
b.
Inspection. Inspect all parts for signs of excessive wear as follows:
(1)
Inspect male and female splined surfaces for wear, chipped teeth and other damage.
(2)
Inspect sprocket and gear teeth for excessive wear, chipped teeth and other damage.
(3)
Inspect shaft and pillow blocks for signs of scoring.
(4)
Inspect bearings, bearing retainers and seal for signs of damage.
c.
Drive Shaft Repair
(1)
Light scoring of shaft bearing surfaces and pillow block surfaces can be polished out with 400 grit or finer
emery cloth.
(2)
Repair other defective parts by replacement.
5-90
Winch drive shaft reassembly and installation
NOTE
During reassembly lubricate bearing and splined surfaces to reduce friction. Hand pack bearings
with lubricant before installation. Bearings may be heated to a maximum of 225°F in an oil bath or
oven to ease installation. (Ensure bearings are not in contact with a heated surface such as the
bottom of the pan.) After installation of the lube fittings lubricate the bearings before installing
final seals and retainers.
a.
Install inner ball bearing retainer on shaft.
b.
Press ball bearing on shaft from sprocket end until it is seated against shoulder and bearing retainer.
c.
Push pillow block over bearing and install spacer.
d.
Install bearing retainer, lube fitting and seal.
e.
Turn shaft around and install spacer and drive gear. Drive gear can be tapped with a soft hammer if necessary.
Tap all around gear to insure it remains square with shaft.
f.
Install roller bearing spacer and press roller bearing on shaft.
g.
Complete assembly in reverse sequence of removal procedure.
h.
Reinstall winch drive shaft assembly.
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