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WHEELS, BEARINGS AND TIRES
22-3
Cleaning and Inspection
(1) Clean the hub and drum assembly and the bear-
ings in kerosene, mineral spirits or other similar
cleaning fluids.
Do not dry the bearings by
air
spin-
ning.
(2)
Examine the bearing cups for pits, brinell
marks or other imperfections. If cups are damaged,
remove them from the hub with a soft steel drift po-
sitioned in the slots in the hub.
(3) Bearing cup areas in the hub should be smooth,
without scored or raised metal which could keep the
cups from seating against the shoulders in the hub.
(4)
The cones and rollers should have smooth,
un-
broken surfaces without brinell marks. The ends of
the rollers and both cone flanges should also be
smooth and free from chipping or other damage.
Installation
(1) If the bearing cups were removed, start the new
cups into the hub evenly, driving them flush with the
hub using a soft steel block and hammer. Seat the
cups against the shoulders in the hub, using a soft
steel drift and hammer.
(2) Fill the hub cavity (Fig. 3) with recommended
wheel bearing lubricant. Lubricant should be even
with inner diameter of bearing cups.
6 2 x 41A
Fig. 3-Wheel
Hub Grease Cavity
(3) Force lubricant between bearing cone rollers or
repack with a suitable "Bearing Packer."
(4)
Install the inner cone and a new seal with lip of
seal facing inward. Using Tool (2-3893, drive the seal
flush with the end of the hub. The seal flange may be
damaged if the tool is not used.
(5) Clean the spindle and install the wheel, tire and
drum assembly.
(6) Install the outer bearing cone, thrust washer
and adjusting nut.
Adjustment
(1) Tighten the wheel bearing adjusting nut to 90
inch-pounds while rotating the wheel.
(2) Position the nut lock (Fig.
4)
on the nut with
one pair of slots in line with the cotter pin hole.
(3) Back
off
adjusting nut and lock assembly one
slot and install the cotter pin. The resulting adjust-
ment should be zero (no preload) to .003 inch end
Play
*
Fig. 4-Front
Wheel Bearing Adjustment
(4)
Clean the grease cap, coat the inside with wheel
(5) Install the wheel covers and lower the vehicle
bearing lubricant (do not fill) and install the cap.
to the floor.
WHEEL COVERS
To avoid damaging the wheel covers during remov-
al and installation, care should be used to be sure the
forces are applied to the correct areas (Fig. 5). The
covers are structurally stronger at the outer circum-
ference to withstand the force required for removal
and installation. Use a rubber end mallet when in-
stalling the covers.
PRYING SURFACE
N K 7 2 7
Fig. 5-Wheel
Cover Attachment
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