INSUFFICIENT BRAKE FORCE TO STOP VEHICLE (REAR AXLE BRAKES)

TM 9-2320-285-24-1

2-46.

SERVICE BRAKE SYSTEM TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

14. INSUFFICIENT BRAKE FORCE TO STOP VEHICLE (REAR AXLE BRAKES)

Step 1.

Remove rear axle brakes air chambers (para 2-51d(2)). Check brake shoe and lining assemblies

for excessive wear.

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

b. If linings are not excessively worn, go to step 2 below.

Step 2.

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 not contaminated, go to step 3 below.

Step 3.

Check slack adjuster, camshaft, and associated parts 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.

Check rear axle brakes air chambers for damage.

a. If rear axle brakes air chambers are damaged, repair (para 2-51d(2)).

b. If rear axle brakes air chambers are not damaged, go to step 5 below.

Step 5.

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).

15. FRONT AXLE BRAKES SQUEAK OR GROAN, OR SCRAPING NOISE WHEN APPLIED

Step 1.

Remove brake drums (para 2-44a).

Check brake shoe linings for wear (worn to depth of groove at side

of lining), glaze, lubricant contamination, or excessive dust.

2-531