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TM 10-3930-671-24
9.6. Steer Axle
Wheel Bearing Maintenance
Steer Wheel Bearing Check ...........................................................................F-421
Steer Wheel Bearing Adjustment ....................................................................F-421
Steer Wheel Bearing Lubrication ....................................................................F-422
Steer Wheel Bearing Check
NOTE
To perform this service procedure, it
is recommended that you first:
•
Park truck on level surface and fully lower
upright.
•
Return controls to neutral, apply parking brake
and turn key switch OFF.
•
Lift and block truck up to raise steer wheels off
the floor.
Refer to Section 3. 3, Machine Jacking & Blocking.
1.
Be sure that truck is parked and blocked up
correctly and safely to raise steer wheels off the
floor.
2.
To check the steer wheel bearings for excessive
free play or looseness, grasp the wheel with both
hands and try to move it by a rocking motion,
side to side or top to bottom. Also, try to pull it in
and out along the wheel spindle. Watch for
excessive free play in wheel bearings or steering
knuckle bearings. There should be a small
amount of free movement. The maximum
allowable end play is .003 inch (0.08 mm). If the
wheel has excessive end play, the bearings
require additional service and/or adjustment.
NOTE
Generally,
wheel
bearings
need
adjustment only after many hours of
operation. It is recommended that
you clean and repack the bearings
before adjustment. Check hour meter
total hours and refer to Section 3.1,
Recommended PM and Lubrication
Schedule. See steer wheel bearing
lubrication procedure below.
Steer Wheel Bearing Adjustment
The steer wheel bearings are retained and adjusted by
the wheel spindle nut.
1.
Remove hubcap by first loosening by tapping
gently on the outer edge of hubcap in space at
end of hub with a hammer and chisel. You may
have to further loosen and finish removing the
hubcap using a pry bar.
2.
Remove cotter pin.
F-421
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