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Book 54722160 (8/02)
FASTENERS
Visually check entire unit in regard to bolts, nuts and
screws being properly secured. Spot check several
capscrews and nuts for proper torque. If any are found
loose, a more thorough inspection must be made.
Take corrective action.
COMPRESSOR OIL
The lubricating and cooling oil must be replaced every
1000 hours of operation or six (6) months, whichever
comes first.
RUNNING GEAR
Every month or 500 miles, tighten the wheel lug nuts to
85 -- 95 lbs.--ft. Every six months the wheel bearings,
grease seals and axle spindles should be inspected
for damage (corrosion, etc.) or excessive wear. Re-
place any damaged or worn parts. Repack wheel
bearings. Use a wheel bearing grease conforming to
specification MIL--G--10924 and suitable for all ambi-
ent temperatures.
Grease can be replaced in a wheel bearing using a
special fixture or by hand as follows.
Place a spoonful of grease in the palm of one hand and
take the bearing in the other hand. Push a segment of
the wider end of the bearing down into the outer edge
of the grease pile closest to the thumb. Keep lifting and
pushing the bearing down into the edge of the grease
pile until grease oozes out both from the top and from
between the rollers. Then rotate the bearing to repeat
this operation on the next segment. Keep doing this
until you have the entire bearing completely filled with
grease.
Before installing bearing, place a light coat of grease
on the bearing cups which are pressed in the hub.
NOTICE
Excessive grease in the hub or grease cap serves
no purpose due to the fact that there is no way to
force the grease into the bearing. The manufactur-
er’s standard procedure is to thoroughly pack the
inner and outer bearing with grease and then to
apply only a very small amount of grease into the
grease cap.
If bearing adjustment is required or the hub has been
removed for any reason, the following procedure must
be followed to ensure a correct bearing adjustment of
0.001 to .012 free play.
1.
While rotating hub slowly to seat the bearings,
tighten spindle nut to approximately 15 lbs.--ft.
Grasp the tire at the top and bottom and rock, in
and out. There should be no evidence of loose-
ness (free play) at the bearing.
2.
Loosen nut to remove preload torque. Do not
rotate hub.
3.
Finger tighten nut until just snug. Loosen nut
until the first nut castellation lines up with cotter
pin hole in spindle. Insert cotter pin.
4.
Ensure a definite but minimal amount of free
play by rocking the tire.
5.
Bend over cotter pin legs to secure nut and
clear grease cap.
6.
Nut should be free to move with only restraint
being the cotter pin.
