REAR AXLE - TM-10-3930-633-340020

TM 10-3930-633-34

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

BRAKE S-- Continued

2. UNEVEN, NOISY, GRABBING BRAKESContinued

Step 6. Check for frozen (corroded) master cylinder or wheel cylinder pistons.

Repair defective cylinders.

Step 7. Check for glazed linings.

Remove glaze from linings. Use sandpaper P-P-101.

3. BRAKES DO NOT RELEASE.

Step 1. Check for improperly adjusted brake pedal (see TM 10-3930-633-12).

Adjust pedal free travel.

Step 2. Check for restricted by-pass port in master cylinder.

Rebuild master cylinder (sad TM 10-3930-633-12).

Step 3. Check for swollen master cylinder cups.

Rebuild master cylinder (see TM 10-3930.633-12).

Step 4. Check for sticking wheel cylinders.

Rebuild wheel cylinders (para. 9-6).

Step 5. Check for broken return springs, warped or misaligned shoes or backing plate.

Overhaul brakes (para. 9-6).

REAR AXLE

1. CONTINUOUS NOISE FROM AXLE.

Step 1. Check for low lubricant level.

Refill to proper level (see LO 10-3930-633-12 and TM 10-3930-633.12).

Step 2. Check for uneven tire sizes or pressure.

Install correct tire size and inflate to proper pressure (45 PSI).

Step 3. Check rear wheel bearings for wear.

Adjust or replace wheel bearings as required (see TM 10-3930-633-12).

Step 4. Check for loose mounting bolts around differential mounting or reduction gearcase.

Tighten loose mounting bolts.

Step 5. Disassemble differential and check for missing gear teeth, worn bearings, broken parts, etc.

Repair or replace as required (para. 10-4).

Step 6. Disassemble reduction gear case and check for missing gear teeth, worn bearings, broken parts, etc.

Repair or replace as required (para. 10-3).

2. NOISE FROM AXLE ON TURNS ONLY.

Step 1. Check adjustment of rear wheel bearings.

Adjust rear wheel bearings as required (see TM 10-3930-633-12).

Step 2. Remove and disassemble differential; check for damaged side gears, pinions, etc.

Repair or replace as required (para. 10-4).

STEERING/FRONT AXLE/SPRINGS

1. STEERING REQUIRES EXCESSIVE EFFORT.

Step 1. Check for low air pressure in tires.

Inflate tires to proper air pressure (45 PSI rear, 100 PSI front).

Step 2. Check for stiffness in tie rod ends, steering knuckles and steering gear due to lack of lubrication.

Lubricate all items in accordance with LO 10-3930-633-12.

Step 3. Check for bent or misaligned tie rod or drag link.

Replace damaged drag link. Repair tie rod (para. 11-2).

2. TRACTOR WANDERS OR WEAVES.

Step 1. Check front wheel toe-in.

Adjust to specifications (para. 11-2),

Step 2. Check for loose drag link connections.

Tighten drag link ball stud ends to eliminate play in steering linkage.

Step 3. Check for excessive play in front wheel bearings.

Adjust front wheel bearings to specification (see TM 10-3930.633-12).

Step 4. Check for excessive play in steering gear due to wear.

Overhaul steering gear (para. 11-3).

Step 5. Check for loose steering gear mounting bolts.

Tighten all steering gear mounting bolts.

3. NOTICEABLE PULL TO ONE SIDE.

Step 1. Check front tires for mismatch, or low air pressure.

Install tires of same size on both wheels. Inflate to 100 PSI (front wheels).

Step 2. Check wheel bearings for tight adjustment.

Adjust wheel bearings to eliminate binding (see TM 10-3930-633.12),

Step 3. Check tie rod adjustment/wheel alignment.

Align front wheels (para. 11-2).

2-6