Komatsu PC800-8 Operation & Maintenance Manual page 74

Hydraulic excavator
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DETAILED CONTROLS AND GAUGES
Hydraulic Oil Temperature Monitor
Monitor (2) warns operator that the hydraulic oil temperature
has risen.
If monitor lights up red during operations, run engine at low idle
or stop the engine and wait until the oil temperature goes down
and monitor (2) changes to green.
Check for clogging of the radiator grill or any other problem that
will cause overheating.
Engine Oil Pressure Monitor
Monitor (3) lights up red if the engine lubrication oil pressure
goes below normal level. If monitor lights up red, stop the
engine immediately, check the lubrication system and level of
oil in the engine oil pan.
REMARK
While the starting switch is ON, the lamp will remain lit and will
go off once the engine is started.
The lamp may lights up momentarily and the alarm buzzer
sounds when the engine starts up or stops, but this is nothing
abnormal.
3-10
OPERATION

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