Table 4-4. Organizational Maintenance Troubleshooting

TM 10-3930-630-12

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

TRUCK DOES NOT MOVE WHEN ACCELERATOR IS DEPRESSED

Step 1.

Check accelerator linkage.

Adjust or replace carburetor linkage.

Step 2.

Check transmission linkage.

Adjust transmission lever and linkage (para 4-58).

Step 3.

Check drive axle.

Adjust drive axle bearings (para 486) or notify direct and general support maintenance if drive axle is

defective.

10.

TILT AND LIFT MECHANISMS DO NOT OPERATE WHEN LEVERS ARE ACTUATED

Step 1.

Check hydraulic filter element indicator.

If indicator shows element is restricting flow, replace element (para 4-43).

Step 2.

Check hydraulic reservoir and lines for leaks.

Tighten connections or replace lines and/or reservoir (para 444).

Step 3.

Check control lever operation.

Adjust or replace defective levers (para 4-41). Notify direct and general support maintenance if control valve

is defective

11.

SERVICE BRAKES DO NOT STOP TRUCK PROPERLY

Step 1.

Check brake pedal and linkage.

Adjust or replace pedal and linkage (para 4-87).

Step 2.

Check master cylinder.

Fill master cylinder or replace defective master cylinder (para 4-90)

Step 3.

Check wheel cylinders.

Bleed brake system or replace defective wheel cylinder (para 4-89)

Step 4.

Check service brake shoes.

Replace unserviceable springs or brake shoes (para 4-88).

12.

PARKING BRAKE DOES NOT HOLD TRUCK ON SLOPE

Step 1.

Check parking brake linkage.

Adjust or replace defective parking brake linkage or lever (para 4-91)

Step 2.

Check parking brake.

Repair or replace parking brake (para 4-92)

13.

TRUCK DOES NOT STEER PROPERLY

Step 1.

Check drag link and tie rod.

Adjust, repair or replace defective drag link and/or tie rods (para 4-7).

Step 2.

Check steering axle mounting.

Adjust mounting or adjust steering axle (para 4-78).

Step 3.

Check steering valve and cylinder.

Notify direct and general support maintenance if valve is defective. Replace defective steering cylinder (para

4-76).

14.

HEAD AND TAILLIGHTS DO NOT OPERATE WHEN SWITCH IS ACTUATED

Step 1.

Check headlight and taillight.

Repair or replace defective lights (para 4-47).

Step 2.

Check light switch.

Repair or replace defective light switch (para 4-31).

Step 3.

Check stoplight switch.

Replace defective switch (para 4-90).

16.

HORN DOES NOT SOUND

Step 1.

Check horn button.

Replace defective horn button (para 4-77).

Step 2.

Check battery.

Charge or replace defective battery (para 446). 4-48

Step .

Check horn and relay.

Replace defective horn and/or relay (para 448).

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