Table 3-2 Troubleshooting

Table 3-2. Troubleshooting - Continued

Corrective action

Probable cause

Malfunction

a. Engine speed governed too low.

a. Adjust governor (para 3-29).

22. Lift and tilt motions too slow.

b. Air leaks in system.

b. Tighten all connections.

c. Insufficient oil in reservoir.

c. Fill reservoir as prescribed in LO

10-3930-621-12.

d. Defective pump or cylinder.

d. Replace cylinder (para 3-75) or refer to

direct and general support maintenance

personnel to replace pump and repair

cylinder.

a. Leak in hydraulic lines.

a. Tighten connections or replace damaged

23. Tilting action creeps.

lines.

b. Defective cylinder.

b. Replace cylinder (para 3-75). Refer to

direct and general support maintenance

personnel to repair cylinder.

a. Insufficient oil in hydraulic reservoir.

a. Fill reservoir as prescribed in LO

24. Hydraulic pump noisy.

10-3930-621-12.

b. Air leaks at pump.

b. Tighten connections at pump.

c. Reservoir breather restricted.

c. Clean breather.

d. Pump head loose.

d. Tighten screws.

c. Worn or defective pump.

e. Refer to direct and general support

maintenance personnel.

a. Control valve not properly adjusted.

25. Mechanism lifts but will not lower load.

a. Refer to direct and general support

maintenance personnel.

b. Control valve defective.

b. Refer to direct and general support

maintenance personnel.

Section VI. FIELD EXPEDIENT REPAIRS

3-14. General

Small hole in radiator . . . . . . . . . Plug hole with wooden plug on

Operator and organizational maintenance troubles

metal screw. Fill with

may occur while the truck is operating in the field

coolant and operate.

where supplies and repair parts are not available

Thermostat defective (closed) . . . . . Remove thermostat and operate

and normal corrective action cannot be performed.

without it (para 3-38).

When this condition exists, the following expedient

3-17. Engine Not Receiving Sufficient Fuel

repairs may be used in emergencies, upon decision of

Expedient remedy

Trouble

the unit commander. Equipment so repaired must be

Fuel filter bowl screen clogged . . . Remove screen and operate with-

removed from operation as soon as possible and prop-

out it (para 3-31).

erly repaired before being placed in operation again.

3-18. Loss of Lubricating Oil

3-15. Loss of Fuel

Expedient remedy

Trouble

Expedient remedy

Trouble

Oil filter element clogged . . . . . . . . Remove element and operate

Fuel tank has pinhole leak . . . . . . .Install a metal screw with a

without it (para 3-4).

rubber washer in the hole.

Small hole in oil pan . . . . . . . . Plug with a wooden plug or

Fuel line cracked . . . . . . . . . . . Tape fuel line to stop leak and

metal screw. Fill crankcase

operate.

and operate truck.

Fuel filter bowl cracked . . . . . . . . . Bypass fuel filter and operate

without it.

3-16. Engine Overheats

Expedient remedy

Trouble

Collapsed radiator hose . . . . . . . .Remove hose and insert section

of heavy coiled wire inside

hose. Install hose, fill with

coolant, and operate.

3-10