UNEVEN OR ERRATIC FRONT AXLE BRAKES (Cont)

TM 9-2320-285-24-1

2-46.

SERVICE BRAKE SYSTEM TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

2. UNEVEN OR ERRATIC FRONT AXLE BRAKES (Cont)

Step 3.

b. If brake shoe linings are okay, go to step 4 below.

(cont)

Step 4.

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

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

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

Step 5.

Remove front axle brakes air chambers (para 2-51d(1)).

Remove wedge assembly (para 2-50a).

Check front axle brakes air chambers and wedge assembly for damage or wear.

a. If front axle brakes air chambers or wedge assembly are damaged

or worn, replace (para 2-50a or 2-51d(l)).

b. If front axle brakes air chambers and wedge assembly are not

damaged or worn, go to step 6 below.

Step 6.

Disassemble front axle brakes (para 2-50a).

Check plungers for wear, damage, or sticking.

If plungers are worn, damaged, or sticking, repair or replace parts as required (para 2-50a).

3. UNEVEN OR ERRATIC REAR AXLE BRAKES

Step 1.

Check if air pressure in each tire is 120 psi.

a. If air pressure in each tire is not 120 psi, adjust tire pressure.

b. If air pressure in each tire is 120 psi, go to step 2 below.

Step 2.

With front wheels blocked and PARKING BRAKE valve pushed down fully,

check brake drum-to-lining clearance (para 2-50a).

a. If clearance is excessive, adjust brakes (para 2-50a); then

retest for proper operation. If rear axle brakes operation

remains uneven or erratic, go to step 3 below.

b. If clearance is not excessive, go to step 3 below.

2-521