II. LUBRICATION
Recommended Lubricants
LUBRICANT
ABOVE 320
BELOW 32°
Gear Oil
MIL-L-2105 B
MIL-L-2105 B
SAE 140
SAE 90
MIL-L-2105 C
MIL-L-2105 C
80W-140
80W-90
Chassis Grease
MIL-G-10294
MIL-G-10294
Wheel Bearing Grease
NLGI Grade #2
NLGI Grade #2
Wheel Bearing Oil
Use same as recommended for differential
A.
Wheel Bearings
Wheel bearings require cleaning, inspection,
packing with grease or an oil change at each brake re-
line. Wheel bearings should be lubricated in accordance
with the vehicle manufacturers recommendations. They
may either be grease packed or oil lubricated. A 1/4"
pipe plug (see fig. 2) is located under the hub cap in the
outer axle shaft flange. Oil filled wheel hubs should be
filled to the level of this plug when it is in a position on the
axle horizontal centerline. Grease packed bearings
require that the section of the wheel hub between the
bearing cups be filled to the level of the inner diameter of
the bearing cups.
The outer axle shaft inner bearing should also be
packed with grease, if the hubs are not lubricated with
oil. With the outer shaft out for access to the wheel
bearings, disconnect the joint from the inner and outer
drive yokes, and push the outer drive yoke from the
bearing and seal. The bearing rollers are now
accessible and may be packed by hand. Do not use
anything to apply grease that would cut the seal. If oil
lubricated, the bearing will receive its supply from the
wheel bearing reservoir, and repacking is not required.
See Section IV-B and Section VI-D, H and I for
disassembly and reassembly of hubs and outer axle
shaft.
B.
Universal Joints
Universal joints should be lubricated at each chassis
lubrication (approximately 1,000 mile intervals). Vehicles
operated with the joints submerged must be lubricated at
more frequent intervals. Apply until seepage is detected
around each of the rubber cap seals. If all seals do not
release lubricant, move the cross laterally in all four
directions, then pull down on the bearing cap opposite
the side that did not release. Apply lubricant until a flow
appears.
Fig. 2
Fig. 3
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