FRONT AXLE BRAKES AUTOMATIC ADJUSTMENT NOT OPERATING (Cont)

TM 9-2320-285-24-1

2-46.

SERVICE BRAKE SYSTEM TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

4. FRONT AXLE BRAKES AUTOMATIC ADJUSTMENT NOT OPERATING (Cont)

Step 2.

Remove plungers (para 2-50a).

Check plungers for corrosion, inadequate lubrication, or improper position.

Check plungers and pawls for damage.

a. If plungers are corroded, replace (para 2-50a).

b. If plungers are inadequately lubricated, lubricate (para 2-50a).

c. If plunger is not positioned properly, reposition (para 2-50a).

d. If plungers or pawls are damaged, replace (para 2-50a).

5. FRONT AXLE BRAKES DRAGGING

Step 1.

Check wheel bearing for proper adjustment (raise wheel and use pry

bar to check for any noticeable end play) or damage.

Repeat for other wheel.

a. If end play is noticeable, adjust or replace wheel bearing (para 2-44a).

b. If end play is not noticeable, go to step 2 below.

Step 2.

Remove brake drums (para 2-44a).

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

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

Step 3.

Check if wedge assembly is out of front axle brake air chamber housing socket or is damaged.

a. If wedge assembly is out of front axle brake air chamber housing

socket, reinstall (para 2-50a); if wedge assembly is damaged, replace (para 2-50a).

b. If wedge assembly is installed properly and is not damaged, go to step 4.

2-523