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323
Excessive Heating of Oil In System
HEATING CAUSED BY POWER UNIT (RESERVOIR, PUMP, RELIEF VALVE, AND COOLERS)
CAUSE REMEDY
Relief valve set at a higher or lower pressure than
specified. Excess oil dissipated through
increased slippage in various parts, or through
relief valve
Reset relief valve to recommended pressure
Internal oil leakage due to wear Repair or replace faulty component
Viscosity of oil too high or too low
Follow recommendations for correct viscosity
grade to be used
Pumps assembled after overhaul may be
assembled too tightly. This reduces clearances
and increases rubbing friction
Follow instructions when reassembling
Leaking relief valves Repair
Improper functioning of oil cooler Inspect cooler and see that it is working properly
Improper machine operation
Return control to neutral when stalled, cylinder at
end of stroke, etc.
HEATING BECAUSE OF CONDITIONS IN SYSTEM
CAUSE REMEDY
Restricted lines
If lines are crimped, replace; if partially plugged
for any reason, remove obstruction
Internal leaks Locate leaks and correct
Low oil level Check oil level and fill if necessary