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Page Title: TOPIC 4. DRIVE WHEEL PNEUMATIC TIRES (PRT Only)
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TM 10-3930-644-14&P
TOPIC 4. DRIVE WHEEL PNEUMATIC TIRES (PRT Only)
A. GENERAL
C. INSTALLATION
The drive wheel pneumatic tire assembly consists of a
1. Position tire and rim assembly on drive wheel
rim, tire, tube, flap, disc, and a retaining ring. For good
hub. Install spacer and position second tire and
performance and long tire life, the correct tire pressure
rim assembly on drive wheel hub.  Install rim
must be maintained.  Air pressure should be checked
clamps and washers; start nuts on wheel hub
every day with an accurate tire gauge.
studs.  Tighten opposite nuts alternately (180
from each other) until rim is properly seated on
Recommended tire pressure for Models ACP 100-120-
wheel hub. Then tighten nuts to a torque of 100
140 with 8.25 x 15 12 ply tires is 100 psi.
lb-ft.
2. Raise front of unit slightly with hoist and remove
Recommended tire pressure for Models ACP 100-120-
service jacks from under drive axle housing.
140 trucks with specified heavy duty rims and 7.50 x 15
Then lower the unit so tires rest on the floor.
14 ply tires is 130 psi.
Remove hoist from rear of unit.
Recommended tire pressure for Models ACP 60-70-80
D. SERVICE - TIRE AND TUBE REPAIR
trucks with specified standard rims is 100 psi.
If a tire is excessively worn or badly damaged, it must be
B. REMOVAL
replaced.
1. Attach a suitable hoist of adequate capacity to
CAUTION
the front of the unit and raise it sufficiently so the
Make certain the tube is completely
drive wheels clear the floor.  Carefully place
deflated before the retaining ring is
sturdy service jacks under both sides of the
removed from the rim.
drive axle housing. Lower the unit Just enough
to take stress off the hoist.
1. Completely deflate the tube.
2. Remove nuts, washers, and clamps (Fig 6-1)
2. Use proper tire irons and remove the retaining
that secure tire rim to drive wheel hub; remove
ring from the rim.
the tire and rim assembly. Remove the spacer
and second tire and rim assembly.
Figure 6-1. Dual Tire Assemblies
2-73

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