REAR AXLE BRAKES DRAGGING (Cont) - TM-9-2320-285-24-10549

TM 9-2320-285-24-1

2-46.

SERVICE BRAKE SYSTEM TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

6. REAR AXLE BRAKES DRAGGING (Cont)

Step 7.

Check air brake system lines and fittings for air leaks.

a. If lines are leaking air, repair or replace (para 2-51a).

b. If fittings are leaking air, tighten. If fitting leaks after tightening, replace (para 2-51a).

7. FRONT AXLE BRAKES GRABBING

Step 1.

Check air brake system lines and hoses for damage or cracks.

a. If lines and hoses are leaking air, repair or replace (para 2-51a).

b. If lines and hoses are not leaking air, go to step 2 below.

Step 2.

Remove brake drums (para 2-44a).

Check brake shoe linings for grease or dirt contamination.

a. If brake shoe linings are contaminated, replace brake shoes (para 2-50a).

b. If brake shoe linings are not contaminated, go to step 3 below.

Step 3.

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. Check brake shoes for excessive wear.

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

If brake shoes are

excessively worn, replace (para 2-50a).

b. If return springs have proper tension and brake shoes are not excessively worn, disassemble

and reassemble wedge assembly and plungers (para 2-50a).

8. REAR AXLE BRAKES GRABBING

Step 1.

Check air brake system lines and fittings for air leaks.

a. If lines and fittings are leaking air, repair or replace (para 2-51a).

b. If lines and fittings are not leaking air, go to step 2 below.

2-526