TROUBLESHOOTING
11-10
HYDRAULIC SYSTEM
Problem Cause Solution
Hydraulic Oil Overheats Relief valve See your authorized dealer.
Contaminated oil Drain oil and refill.
Travel motors See your authorized dealer.
Improperly adjusted hydraulic
components
See your authorized dealer.
Oil Foams Air leak in line from reservoir to pump Repair leak or see your authorized
dealer.
Kinks or dents in oil lines Check lines.
Wrong oil Use correct oil.
Water in oil Change oil.
High or low oil level Correct level.
Low or No Oil Pressure Wrong oil Use correct oil.
Improperly adjusted hydraulic
components
See your authorized dealer.
No oil in system Fill with correct oil.
Worn cylinder packing See your authorized dealer.
Relief valve See your authorized dealer.
No Hydraulic Functions
(Noise from pumps)
Hydraulic pump See your authorized dealer.
Decreased set-pressure of main relief
valve in control valve
See your authorized dealer.
Lack of hydraulic oil Add oil.
Damaged suction line or hose See your authorized dealer.
Clogged suction filter Clean.
Sucked air from oil suction port Tighten.
Hydraulic Cylinders Operate
but Cannot Lift Load
Hydraulic pump worn See your authorized dealer.
Main relief valve pressure low See your authorized dealer.
Hydraulic oil level low Add oil.
Suction screen plugged Clean strainer and system.
Pump suction line leaking Inspect suction line.
Pressure sensors See your authorized dealer.
Solenoid valve See your authorized dealer.
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