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Page Title:
Table 2-2. Troubleshooting Chart |
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 Table 2-2. Troubleshooting Chart - Continued
Malfunction
Probable Cause
Corrective Action
5. Slow or erratic clutch engagement.
a. Improper shift linkage arrangement or
adjustment.
b. Low main pressure.
b. Main pressure regulator valve stuck.
Clean, check springs, free up in valve
c. Internal oil leaks.
rings. Overhaul transmission (chap. 7).
6. Low clutch pressures
and
slow
a. Worn pumps.
engagement at idle.
b. Low oil level.
b. Add specified oil.
c. Leak on intake side of main pump.
Directional clutch for direction vehicle
7. Vehicle drives in one direction and
will move not releasing.
creeps in that direction in neutral but
stalls when shifted to opposite
direction.
8. Inching control fails to operate.
Control linkage out of adjustment.
Adjust control linkage (para 7-5).
HYDRAULIC SYSTEM
1. Pump fails to start pumping.
Damaged pump.
Replace hydraulic pump (para 12-3).
2. Low pump pressure.
Worn pump.
Replace pump (para 12-3).
3. Undue pump vibration.
a.
Pump bearings defective.
a.
Replace pump (para 12-3).
b.
Loose mounting.
b.
Tighten pump mounting hardware.
4. No movement of upright assembly.
Defective hydraulic pump.
Replace pump (para 12-3).
5. Hoist cylinder will not maintain raised
a.
Hoist cylinder leakage.
a.
Replace packings (para 12-1).
position with load.
b.
Internal control valve leakage.
b.
Repair control valve.
c.
Leakage at hydraulic lines and fittings
c.
Inspect and correct as necessary.
6. Will not lift full rated load.
a.
Worn pump.
a.
Overhaul pump (para 12-3).
b.
Internal control valve leakage.
b.
Repair or replace control valve (para 7-
STEERING
1. Difficult steering or wandering.
a.
Steering gear out of adjustment.
a.
Readjust steering gear.
b.
Damaged drag link.
b.
Replace.
c.
Defective steering gear.
c.
Replace.
d.
Excessive leakage of fluid.
d.
Check for leaks, correct and check
hydraulic tank level.
2. Fluctuating pressure.
Faulty operation of relief valves.
Flush and refill hydraulic system. If con-
dition still exists, overhaul valve
assembly.
3. Loss of system pressure.
Broken pump drive, other
pump
Repair pump and pump drive gear.
malfunction.
4. Chatter conditions.
a. Loose mounting or linkage.
a. Make certain all ball stud mounting and
other linkage is tight. Check pitman
arm stops to be certain the arm strikes
the stops slightly before the steering
knuckles contact the stops on the axle.
b. Relief valve set too low.
b. Set relief valve at least 150 psi higher
than normal steering requirements of
the vehicles. Bleed air from system.
c. Insufficient pump flow.
c. Insufficient pump flow at idle speeds can
be corrected by increasing engine idle
rpm.
Section III. REMOVAL AND INSTALLATION OF MAJOR COMPONENTS
(2) Disconnect these points on left side of engine
2-6. Engine
(TM 10-3930-627-12).
a. Removal.
(a) Air cleaner to carburetor hose.
(1) Drain cooling system and
Remove radiator (TM 10-3930-627-12).
2-5
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