Book 22091102 (12/01)
37
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NOTICE
If there is any indication of formation of varnishes,
shellacs or lacquers on the oil filter element, it is a
warning the compressor lubricating oil has im-
proper characteristics and should be immediately
changed.
3. Inspect filter gasket contact area for cleanliness
and damage. Clean or repair as necessary.
4. Install new filter by turning element clockwise until
gasket makes initial contact. Tighten an
additional
1/2 to 3/4 turn.
5. Start unit and allow to build up to rated pressure.
Check for leaks before placing unit back into
service.
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. Replace
any damaged or worn parts. Repack wheel bearings.
Use a wheel bearing grease conforming to
specification MIL--G--10924 and suitable for all
ambient temperatures.
Grease can be replaced in a wheel bearing using a
special fixture or by hand as follows.
Before installing bearing, place a light coat of grease
on the bearing cups which are pressed in the hub.
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.
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
manufacturer’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
looseness (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.
