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 TM 10-3930-644-14&P
Figure 4. Drive Wheel Assembly
C. DRIVE UNIT DISASSEMBLY
The following operations may be performed without
removing the drive unit from the truck.
Figure 6. Removing Drive Wheel
1. Drive Wheel Removal
and retaining nut.
The outer wheel
bearing can now be removed.
The wheel assembly consists of the wheel, tire,
c. After the outer wheel bearing has been
brake drum, wheel bearings and the bull gear.
removed, the wheel can be removed.
(Figure 4.)
(See Figure 6.)
To remove the wheel:
CAUTION
a. Raise the truck sufficiently so that the
When removing wheel, exercise care
drive wheel clears the floor. This may be
so that no carnage to the drum or
cone by tilting the mast to its full backward
brake shoes occurs.
position and inserting a block under the
mast assembly, then tilting mast to its
d. After the drive wheel has been removed,
vertical position. (See Figure 5.)
the inner wheel bearing and the grease
b. Remove capscrews, lockwashers and hub
shield can be removed.
cap. Remove cotter pin, washer
2. Inspection - Service
Using a solvent, wash all grease from the
bearings and bearing surfaces. Inspect for worn
or damaged parts and replace where necessary.
a. Replacing Bearing Cups
(1) Recesses are provided on the inner hub of
the dram; insert a brass drift at these
points, tap lightly with a hammer and
remove cup.
(2) When replacing bearing cups, set in hub
with caper to the outside of the wheel.
Using a brass drift, tap evenly around
ache edge of the cup, exercising care so
that the cup will not bind (bearing press
can also be used for installation).
NOTE
Bearing cup should be a press fit.
Figure 5. Removing Wheel Bearing
2-65
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