TOPIC 4. DRIVE WHEEL PNEUMATIC TIRES (PRT Only)

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

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