LESS OF DRIVE IN ALL RANGES (cont)

TM 10-3930-638-24&P

2-36.

TRANSMISSION

TROUBLESHOOTING

(cont)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

4. LESS OF DRIVE IN ALL RANGES (cont)

Step 4.

(cont)

With an assistant in operator's seat, move control valve assembly direction selector spool and speed

selector spool slowly through their entire range of travel.

Movement of vehicle should be observed.

a. If vehicle moves, adjust transmission linkage controls (para 2-38 b).

b. If vehicle does not move, proceed to step 5.

Step 5.

Disconnect and cap hose connected to

control valve assembly hydraulic

actuator assembly.

Start engine and operate at idle speed

and set parking brake.

With an assistant in operator's seat,

move control valve assembly direction

selector spool and speed selector spool

slowly through their entire range of

travel.

Movement of vehicle should be

observed.

a. If vehicle does not move, replace

control valve assembly (notify

direct support maintenance)

b. If vehicle moves, replace or adjust declutch valve (para 2-43d).

5. LOSS OF POWER

Step 1. Check for foamy oil (para 2-36, MALFUNCTION 1).

Refer to paragraph 2-36, MALFUNCTION 1.

Step 2.

Remove parking brake drum (para 2-42b) and check for locked parking brake linings.

a. If linings are locked in position, disassemble parking brake and inspect parts (para 2-42b);

replace defective parts (para 2-42b).

b. If linings tire not locked in position. reinstall parking brake drum (para 2-42b) and proceed to

step 3.

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

Step 3.

Install shipping lock pin (para 2-4b(1)).

Ensure that parking brake lever is in released position.