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OPERATION
EXPLANATION OF COMPONENTS
Ask your Komatsu distributor for inspection and maintenance as needed.
ENGINE OIL PRESSURE CAUTION LAMP
Engine oil pressure caution lamp warns about abnormality of
engine lubricating oil pressure.
When oil pressure is low
The caution lamp lights up in red and indicates action level
"L03".
The alarm buzzer sounds intermittently.
Stop the operation and move the machine to a safe place, then
ask your Komatsu distributor for inspection and maintenance.
ENGINE OIL LEVEL CAUTION LAMP
Engine oil level caution lamp warns about drop of engine lubri-
cating oil level.
It displays only while the engine is stopped.
When oil level is low
The caution lamp lights up in yellow and indicates action level
"L01".
The oil level in the engine oil pan is insufficient.
Check the oil level in the oil pan and add oil.
For detail, see "METHOD FOR CHECKING OIL LEVEL IN EN-
GINE OIL PAN, ADDING OIL (3-149)".
If the oil level drops again in a short time, the engine oil may be leaking.
For the inspection and maintenance, ask your Komatsu distributor.
ENGINE OVERRUN CAUTION LAMP
The engine overrun caution lamp lights up when engine over-
run occurs.
Since overrun can damage the engine and hydraulic compo-
nents, stop the work immediately and operate at low travel
speed until the overrun caution lamp goes out.
RADIATOR COOLANT LEVEL CAUTION LAMP
Radiator coolant level caution lamp warns about drop of radia-
tor coolant level.
When the coolant level dropped
The caution lamp lights up in yellow and indicates action level
"L01".
The radiator coolant is insufficient.
Check the coolant level in the sub-tank of the radiator and add
coolant.
For detail, see "METHOD FOR CHECKING COOLANT LEVEL,
ADDING COOLANT (3-149)".
If the coolant level drops again in a short time, the coolant may be leaking from the radiator.
3-29
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