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Table 5. Hydraulic equipment troubles
Fault symptoms Reason and action
Will not return from working position to
neutral.
Valve stuck. Clean valve parts. Valve should move
freely without seizure.
Air in the hydraulic system. Locate leaky point and eliminate defect.
Check oil level.
Low oil pressure. Adjust oil pressure.
Hydraulic cylinder piston sealing out of order
or leaking.
Replace sealing.
Hydraulic system noise Air in the system. Locate air suction and eliminate
defect.
Distributor safety valve maladjusted. Adjust valve only with trained service sta.
Oil leaking Replace ruptured hose or tighten hose connection.
Oil leaks from electrical control valve. Replace sealing
Lift is too slow Check oil ow
Table 6. Brake system troubles
Fault symptoms Reason and action
Poor operation of brakes Greasy or worn-out brake pads. Wash brake drums
or pads with cleaner or gasoline.
Poor brake eciency Adjust brake control linkage.
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