EXCESSIVE SERVICE BRAKE PEDAL TRAVEL - TM-10-3930-638-24-P0302

TM 10-3930-638-24&P

2-41. BRAKE SYSTEM TROUBLESHOOTING (cont)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

7. EXCESSIVE SERVICE BRAKE PEDAL TRAVEL (cont)

Step 2. Check hydraulic brake valve for damage/leaking condition (para 2-43c).

a. If hydraulic brake valve is damaged or leaking, repair or replace it (para 2-43c).

b. If hydraulic brake valve is okay, proceed to step 3.

Step 3. Check brake lines and connections between hydraulic brake valve and wheel cylinders for brake fluid

a. If connections are leaking fluid, tighten; if brake lines are leaking fluid, replace (para 2-43b).

b. If brake lines and connections are okay, proceed to step 4.

Place blocks (6 by 6 by 18 inches wood blocks) at each wheel to prevent vehicle from moving.

Step 4.

Remove shipping lock pin from storage area under operator's seat (para 2-4b(1)) and install in chassis.

Ensure that parking brake is applied.

WARNING

Before raising axle off ground, be sure that shipping lock pin is

installed. Failure to do so may cause vehicle to turn and slip

off jack or jack stands causing serious injury or death. If you are

injured by falling equipment, obtain medical aid immediately.

Raise one axle and wheels from ground.

Remove both axle shafts and hub and drum assemblies (para 2-39f).

Check wheel cylinders for leaking condition or sticking piston (para 2-43a, step 1).

Repeat for other axle and wheels.

a. If wheel cylinder is leaking or piston is sticking, replace wheel cylinder (para 2-43a).

b. If wheel cylinder is okay, proceed to step 5.

Step 5. Check brake linings for excessive wear (para 2-43a).

a. If brake linings are worn excessively, replace (para 2-43a).

b. lf brake linings are not worn excessively, adjust brakes (para 2-43a).

8. EXCESSIVE SERVICE BRAKE PEDAL EFFORT REQUIRED

Check brake lines and connections between hydraulic brake valve and wheel cylinders for brake fluid

Step 1.

a. If connections are leaking fluid, tighten; if brake lines are leaking fluid, replace (para 2-43b).

b. If brake lines and connections are okay, proceed to step 2.