UNEVEN OR ERRATIC REAR AXLE BRAKES (Cont)

TM 9-2320-285-24-1

2-46.

SERVICE BRAKE SYSTEM TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

3. UNEVEN OR ERRATIC REAR AXLE BRAKES (Cont)

Step 3.

Install release stud in rear axle brakes air chambers (para 2-51d(2)).

Remove brake drums (para 2-44b).

Check brake shoe and lining assemblies for wear, uneven glaze,

lubricant contamination, or excessive dust.

WARNING

Brake linings contain asbestos fibers. Do not generate dust when working on brake system.

Do not remove dust or dirt with compressed air because serious bodily harm may result from

breathing asbestos dust.

a. If brake shoe and lining assemblies are worn, glazed, or

contaminated, replace (para 2-50b); remove excessive dust.

b. If brake shoe and lining assemblies are not worn, glazed, or

contaminated, go to step 4 below.

Step 4.

Check brake drums for scored, cracked, or warped condition.

a. If brake drums are scored, cracked, or warped, replace (para 2-44b).

b. If brake drums are not scored, cracked, or warped, go to step 5 below.

Step 5.

Remove rear axle brakes air chambers (para 2-51d(2)).

Remove slack adjuster, camshafts, rear axle brakes air chambers, and

associated parts (para 2-50b or 2-51d(2)).

Check slack adjuster, camshafts, rear axle brakes air chambers, and

associated parts for damage or wear.

If parts are damaged, replace (para 2-50b or 2-51d(2)).

4. FRONT AXLE BRAKES AUTOMATIC ADJUSTMENT NOT OPERATING

Step 1.

Remove brake drums (para 2-44a).

Remove brake shoes (para 2-50a) and check if adjusting bolt is frozen in plunger.

a. If adjusting bolt is frozen in plunger, free it and coat plunger (inside and outside surfaces) with

grease.

b. If adjusting bolt is not frozen in plunger, go to step 2 below.

2-522