TOPIC 3. DRIVE WHEEL PNEUMATlC TIRES (PRT only)

TM 10-3930-644-14&P

8. Position new gasket on mounting flange of

11. Replace the drain plug in bottom of differential

differential and coat with a suitable leak proof

housing assembly and fill differential with proper

adhesive.

S.A.E. oil to recommended capacity.

9. Install differential assembly in drive unit and

12. Replace U-Joint and drive shaft coupling: Refer

install capscrews.

to U-JOINTS, INSTALLATION.

13. Install jackshafts;

refer

JACKSHAFT

NOTE

INSTALLATION.

Use copper washers on capscrews

located below oil level of differential.

14. Install drive wheels; refer to DRIVE WHEEL

10. Connect the parking brake cable at brake drum

INSTALLATION.

lever and connect the hydraulic lines and

leakage return line if disconnected during

disassembly.

TOPIC 3. DRIVE WHEEL PNEUMATlC TIRES (PRT only)

A. GENERAL

D. SERVICE - TIRE AND TUBE REPAIR

The drive wheel pneumatic tire assembly consists of a

If a tire is excessively worn or badly damaged, it must be

rim, tire, tube, flap, disc, and a retaining ring. For good

replaced.

performance and long tire life, the correct tire pressure

must be maintained. Air pressure should be checked

CAUTION

every day with an accurate tire gauge.

Make certain the tube is completely

deflated before the retaining ring is

B. REMOVAL

removed from the rim.

1. Attach a suitable hoist of adequate capacity to

1. Completely deflate the tuba.

the front of the unit and raise it sufficiently so the

drive wheels-clear the floor. Carefully place

2. Use proper tire irons and remove the retaining

sturdy service jacks under both sides of the

ring from the rim.

drive axle housing. Lower the unit just enough

to take stress off the hoist.

CAUTION

A safety tire rack, cage, or equivalent

2. Remove nuts, washers, and clamps (Fig 6-1)

protection should be provided and

that secure tire rim to drive wheel hub; remove

used when inflating, mounting, or

the tire and rim assembly. Remove the spacer

dismounting tires installed on rims

and second tire and rim assembly.

equipped with locking rings or

similar devices.

C. INSTALLATION

3. Remove rim from tire. Remove disc, flap, and

1. Position tire and rim assembly on drive wheel

tube from tire.

hub. Install spacer and position second tire and

rim assembly on drive wheel hub. Install rim

4. Repair or replace defective tire, tube, flap, or

clamps and washers; start nuts on wheel hub

disc.

studs. Tighten opposite nuts alternately (180

5. Install tube, flap, and disc in the tire. Install rim

from each other) until rim is properly seated on

in tire. install retaining ring to end of rim. Make

wheel hub. Then tighten nuts to a torque of 100

certain retaining ring is properly seated.

lb-ft.

6. Inflate tube to recommended pres sure specified

2. Raise front of unit slightly with hoist and remove

in preceding Paragraph A, GENERAL.

service jacks from under drive axle housing.

Then lower the unit so tires rest on the floor.

Remove hoist from rear of unit.

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