Komatsu D31EX-21, Operation & Maintenance Manual, Page: 60 / 256

EXPLANATION OF COMPONENTS
OPERATION
3-8
ENGINE COOLANT TEMPERATURE CAUTION LAMP
This lamp (2) indicates a raise in the coolant temperature.
When the monitor lamp flashes, run the engine at low idling
speed until green range of the engine coolant temperature
gauge lights.
HST OIL TEMPERATURE CAUTION LAMP
This lamp (3) warns the operator that the HST oil temperature
has gone up.
If it flashes, run the engine at low idling until the HST oil tem-
perature gauge indicates the green range.
CHARGE FILTER CLOGGING CAUTION LAMP
This lamp (4) warns the operator that the HST charge filter is
clogged.
If it flashes, stop the machine, check for the cause of clogging,
and replace the filter element with a new part.
HST CHARGE PRESSURE CAUTION LAMP
This lamp (5) warns the operator that the HST charge pressure
has dropped.
If it flashes, stop the machine and check for the cause of the
drop in the charge pressure.