Komatsu H75051 Operation & Maintenance Manual page 86

EXPLANATION OF COMPONENTS OPERATION
FUEL LEVEL CAUTION LAMP
The fuel level caution lamp warns about low remaining fuel lev-
el.
The lamp lights up in red if the fuel level is 27 ℓ or below.
Add fuel as soon as possible.
HST OIL TEMPERATURE CAUTION LAMP
The HST oil temperature caution lamp warns about overheat-
ing of the HST oil.
If the HST oil temperature increases abnormally high, the cau-
tion lamp lights up in red and action level "L02" is displayed.
At the same time, the centralized warning lamp lights up and
alarm buzzer sounds intermittently.
Stop the machine in a safe place, set the directional lever and
directional selector switch to NEUTRAL position (N), and run
the engine at a medium speed with no load until the caution
lamp goes out.
If the HST oil temperature becomes less than 10 °C, the caution lamp is lit in white, and the travel speed accel-
eration is limited.
Run the engine at low idle until the caution lamp goes out.
REMARK
The setting to increase the engine low idle speed under the low ambient temperature is available. For details,
see "2-STAGE LOW IDLE SWITCH".
BRAKE OIL PRESSURE CAUTION LAMP
The brake oil pressure caution lamp warns that the brake oil
pressure is below the specified value.
When action level "L03" is displayed
If the brake oil pressure drops below the specified value while
the engine is running, the caution lamp lights up in red.
At the same time, the centralized warning lamp lights up and
alarm buzzer sounds intermittently.
Stop the operation, move the machine to a safe place, stop the
engine, then ask your Komatsu distributor for inspection and
maintenance.
Action level is not displayed and lamp lights up in red
If the brake oil pressure is below the specified value while the engine is stopped, the caution lamp lights up in
red.
When the engine is started, the caution lamp lights up in red until the brake oil pressure rises above the speci-
fied value.
At the same time, the centralized warning lamp lights up and alarm buzzer sounds intermittently.
Wait until the caution lamp goes out, and then start the machine.
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