Elliott Digger Derrick, Руководство по эксплуатации и техническому обслуживанию, Страница: 222 / 376

Troubleshooting EEC-0023 V1.1
Troubleshooting
PUMP MAKES NOISE
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Low oil

Oil viscosity too high

Pump speed too fast

Suction plugged

Ball valve closed

Dirt in pump

Tank breather plugged

Air in oil

Worn pump bearings

Broken Pump parts
OIL OVERHEATING

Operator holds control lever in position too long-oil dumps over relief valve
generating excess heat

Using incorrect oil

Low oil

Dirty oil

Engine running too fast

Incorrect relief valve settings
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Internal oil leakage in valves, cylinders, motors

Restriction in pump suction line

Ball valve closed

Control valve stuck partially open

Heat not radiating properly from hydraulic tank, oil lines and cooler

Excessive operation of winch