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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.
a.
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

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