REAR AXLE BRAKES GRABBING (Cont)

TM 9-2320-285-24-1

2-46.

SERVICE BRAKE SYSTEM TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

8. REAR AXLE BRAKES GRABBING (Cont)

Step 2.

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 grease or dirt contamination.

a. If brake shoe and lining assemblies are contaminated, replace (para 2-50b).

b. If brake shoe and lining assemblies are okay, go to step 3.

Step 3.

Remove slack adjuster, camshaft, and associated parts (para 2-50b)

and inspect for damage or wear.

a. If parts are damaged or worn, replace (para 2-50b).

b. If parts are not damaged or worn, go to step 4 below.

Step 4.

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

Remove brake shoe and lining assemblies (para 2-50b) and check brake

return springs for proper tension: spring tension shall be 75-90 pounds pull at 9-1/2 inches.

Check brake shoe and lining assemblies for excessive wear.

a. If springs do not have proper tension, replace (para 2-50b).

b. If brake shoe and lining assemblies are excessively worn, replace (para 2-50b).

9. FRONT AXLE BRAKES LININGS WEAR UNEVENLY

Step 1.

Remove brake drums (para 2-44a).

Check if brake shoes were installed backwards.

a. If brake shoes were installed backwards, reinstall (para 2-50a).

b. If brake shoes were installed properly, go to step 2 below.

Step 2.

Remove brake shoes (para 2-50a) and check brake return springs for

proper tension: spring tension shall be 75-90 pounds pull at 9-1/2 inches.

a. If springs do not have proper tension, replace (para 2-50a).

b. If springs have proper tension, go to step 3 below.

2-527