Excessive Heating of Oil In Circuit
CONDITION CAUSE REMEDY
HEATING CAUSED BY
POWER UNIT (RESERVOIR,
PUMP, RELIEF VALVE, AND
COOLERS)
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
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
RT500
Troubleshooting
232 REVISED:
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