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 TM 10-3930-633-34
Clean out all rocks and foreign objects lodged in
(3) Lift the wheel and tire assembly off the
the tread. Punctures in the tire can be plugged, or
vehicle.
repaired by hot or cold patch methods. Tubes are
(4) Remove the ten capscrews, nuts and
repaired by hot or cold patch methods, following
washers securing the wheel halves, and separate
t h e instructions furnished with the patch
the wheel halves, tire, tube and flap.
material.
d. Mounting Front Tires.
b. Check tire wear pattern carefully for any
(1) Position tube inside tire, lay tire over
uneven wear patterns. Type of uneven wear and
inside wheel half.
their causes are: wear in center of tread (over-
(2) Position outside wheel half so that tire
inflation), wear on both edges of tread (under
valve may be pulled through hole in wheel. Make
inflation), wear on one side or "feathering" of
certain that tube flap is in place.
tread (out of alignment), and "cupping" or flat
(3) Insert the ten capscrews from inside
spotting (out of balance).
wheel half so they protrude through the outside
wheel half. Install nuts and lockwashers over all
ten screws. Torque screws to 6075 ft/lbs.
Check wheels carefully for bent condition in rim
(4) Inflate the tire to 100 PSI in a safety
or flange area. Straighten as required. Keep
cage. Mount wheel on front axle. Torque wheel
wheels clean, especially at the wheel to drum
nuts to 125--140 ft/lbs.
mounting flange, and bead seating area. Wheels
9-3. Tire Repair
evidencing cracks between mounting holes, or
a. Once removed, inspect tires carefully for
any where in the rim area, must be replaced.
cuts, bruises, punctures, and imbedded objects.
Section Il. BRAKE SYSTEM
9-5. General
Repairs to the brake assemblies consist of
The four wheel hydraulic brakes are of the
reconditioning the brake drums by turning on a
internal expanding shoe type. The brake system
lathe to true-up the lining contact surface, and
incorporates a tandem master cylinder where the
the replacement of worn or defective parts
. front axle brakes and the rear axle brakes are on
through the installation of repair kit parts and
separate hydraulic circuits. This arrangement
shoe and lining sets. Refer to TM 10-3930-633-12
prevents complete loss of braking action in cases
for procedures concerning brake adjustment and
of failure at some point in the system. The
removal of wheels and brake drums.
operator's pedal effort is assisted by a vacuum
a. Disassembly ( Front Brakes ), Refer to figure
booster on the master cylinder pushrod. Engine
vacuum is used to operate the booster. Each
brake assembly provides a means for mechanical
adjustment of lining-to-drum clearance.
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