Table 2-1. Troubleshooting - continued

TM 10-3930-621-34

Table 2-1. Troubleshooting - Continued

Malfunction

Probable cause

Corrective action

b. Steering gear bending or out of

b. Adjust, repair or replace (para 9-2).

19. Loose steering. Continued

adjustment.

c. Loose steering arm.

c. Tighten (Para 9-5).

a. Worn pump.

a. Inspect and replace (para 10-38).

20. Low hydraulic oil pressure.

b. External leakage.

b. Tighten or replace fittings, hoses or

seals (TM 10-3930-621-12).

a. Check capacity on Serial No. Plate

21. Unable to lift or tilt load.

a. Load too heavy.

(TM 10-3930-621-12).

b. Damaged or worn pump.

b. Test and repair or replace as required

(para 10-38).

c. Repair or replace (TM 10-3930-621-

c. Broken lift chain.

12).

d. Damaged lift cylinders.

d. Check for bending or plunger

malfunction (para 10-17 and 10-23}.

e. Test and repair or replace as required

e. Control valve inoperative.

(para 10-44).

a. Internal leakage at pump.

a. Disassemble and inspect for leakage

22. Lift and tilt too slow.

or damaged parts. Repair as required

(para 10-38).

b. Excessive leakage at cylinder

b. Repair or replace packing (para 10-

packing.

17 and 10-23).

c. Air leaks in system.

c. Tighten connections.

d. Misalignment.

d. Check masts, carriage or tilt linkage

for binding (para 10-]5J).

a. Repair or replace packing (para 10-

23. Load creepstilting or lowering.

a. Internal leakage in cylinders.

17 and 10-23).

b. Oil leak at packing glands.

b. Repair or replace packing (para 10-

17 and 10-23).

c. Leak in control valve.

c. Check for worn or damaged plungers

(para 10-44).

d. Leaks in oil lines.

d. Tighten all connections or replace

damaged lines.

a. Re-align.

24. Noisy pump.

Coupling misalignment.

b. Tighten.

Pump head loose.

c. Replace (para 3-41).

Worn or broken parts.

a. Repair or replace pump (para 3-41).

25. Oil overheating.

Internal oil leakage.

b. Remove and repair (para 3-41).

Pump too tight after overhaul

c. Check and repair.

Restricted lines.

Section III. REMOVEAL AND INSTALLATION OF MAJOR

COMPONENTS AND AUXILIARIES.

and hydraulic pump lines and remove associated

2-5. Engine Assembly

clamps.

a. Removal.

(6) Disconnect the following electrical components,

(1) Place rear wheels on four to six inch blocks and

tagging each terminal or lead to show installed position:

block front wheels.

(a) Battery ground cable

(2) Remove seat, hood, rear fenders and grill, and

(b) Starter cable

counter-weight.

(3) Drain cooling system and oil from engine and

(d) Alternator (plug and two terminals)

transmission.

(e) Hourmeter wires

(4) Remove upper and lower radiator hose clamps

(f) Coolant temperature transmitter

and disconnect both hoses from engine.

(5) Disconnect oil filter, transmission oil cooler

2-3