Section 13: WHEELS, HUBS & TIRES
PA1593
8
Remove gaskets. Unscrew lock nut and
remove adjusting nut lock ring.
3. To adjust, tighten adjusting nut until the
wheel binds. Rotate the wheel while tighten-
ing so that all surfaces are in proper contact.
Back off adjusting nut approximately, ¼ to
1/3 turn to assure 0.001/0.007"
(0.0254/0.1778 mm) endplay and to ensure
that wheel turns freely. Replace the lock ring,
and adjust nut dowel pin in one of the holes.
The ring may be turned over if necessary to
allow more accurate bearing adjustment.
4. Tighten lock nut and check bearing
adjustment. Replace the axle shaft using a
new gasket.
8.2 DISASSEMBLY AND REPAIR
1. Jack vehicle as per “Bearing Adjustment"
and remove axle shaft as indicated in "Meri-
tor - Maintenance Manual No. 5" entitled
"Single Reduction Differential Carriers"
annexed to Section 11 of this manual.
2. Remove wheels and tires.
CAUTION
To replace wheel at the same location, always
mark position of the wheel on the axle before
removal, thus avoiding a new wheel
balancing.
3. Remove lock nut, lock ring and adjusting nut
from axle housing to prevent the outer
bearing from falling out. Remove outer
bearing cone and roller assembly.
4. Remove screws attaching inner oil seal
retainer to hub, and remove inner oil seal
assembly. Remove inner bearing cone and
roller assembly. Bearing cups can be sepa-
rated from the hub using a hammer and a
long brass drift.
5. Thoroughly clean all parts. Bearing cone and
roller assemblies can be cleaned in a suita-
ble cleaning solvent using a stiff brush to
remove old lubricant.
6. In case that excessive wear, deterioration,
cracking or pitting is present on the bearing
cups, rollers or cones, the bearings should
be replaced. Seals should be replaced each
time they are removed from the hub. To
install new oil seal, use a suitable adapter
and drive the seal into the retainer bore until
it bottoms.
7. When installing wheel on spindle, center the
wheel hub with spindle to avoid damaging
the seal with the end of the spindle. Push
wheel straight over the spindle until inside
diameter of seal press fits on wiper ring. Fill
hub cavity with general-purpose gear lubri-
cant (refer to Section 24 "Lubrication" for
proper oil grade selection). Lubricate, then
install outer bearing cone. Adjust bearing and
lock.
8. Assemble axle flange to axle using a new
gasket. Apply sealant in stud area. After both
wheels have been assembled according to
above procedure, fill the differential with the
recommended lubricant to the proper factory
recommended level.
NOTE
During regular inspection, do not forget to
check lubricant level in differential. Clean
thoroughly or replace vent as required.
9. TIRE MAINTENANCE
The most critical factor in tire maintenance is
proper inflation (Fig. 8). No tire is impervious to
loss of air pressure. To avoid the hazards of
under inflation, always maintain tires at their
recommended inflation pressure. Improper
inflation decreases tire life.
An under inflated tire builds up heat that can
cause sudden tire destruction, resulting in
improper vehicle handling and possible loss of
vehicle control. At least once a week, before
driving (when tires are cold), check inflation
pressure on all the tires, including the spare tire.
This is especially important in cases when
different drivers operate the vehicle.
WARNING
Failure to maintain correct tire inflation
pressure may result in sudden tire destruction,
improper vehicle handling, and will cause
rapid and irregular tire wear. Inflation pressure
should be checked weekly and always before
long distance trips.
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