SYSTEM CAUTION LAMP
The system caution
lamp warns about abnormality in the sys-
tem.
When action level “L03” is displayed
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.
When action level “L01” is displayed
The caution lamp lights up in yellow.
When you finish the operation, always perform the inspection and maintenance.
Ask your Komatsu distributor for the inspection and maintenance as needed.
WORK EQUIPMENT SYSTEM CAUTION LAMP
The work equipment system caution lamp warns about abnor-
mality in the work equipment system.
• When action level “L03” is displayed
The lamp lights up in red. At the same time, the centralized
warning lamp lights up and alarm buzzer sounds intermit-
tently.
Stop the operation, move the machine to a safe place,
stop the engine, then ask your Komatsu distributor for in-
spection and maintenance.
• When action level “L01” is displayed
The lamp lights up in yellow.
When you finish the operation, always perform the inspection and maintenance.
Ask your Komatsu distributor for the inspection and maintenance as needed.
BRAKE OIL TEMPERATURE CAUTION LAMP
The brake oil temperature caution lamp warns about overheat-
ing of the brake oil.
If the machine is operated continuously under severe condition
or the brake is used frequently on a long downhill slope, the
brake oil temperature increases.
If the caution lamp lights up in yellow, perform the following
remedies according to the machine state just before the lamp
lights up.
(1) When performing the load-and-carry operation repet-
itively
• Return the accelerator pedal, refrain from high speed travel, and check whether symptom changes or not.
• Use E mode or turn off the torque converter lockup switch, and apply the brake after the speed has been
decreased. After a while, the oil temperature goes down.
(2) When the machine has been traveling downhill in a long slope by using the brake
• Downshift the gear speed and drive the machine at a stable speed.
• Use the engine brake together with the brake. (Using the lockup function together is more effective.)
(3) When performing the operation which needs frequent braking
• If you drive the machine or perform the work while dragging the brake, the oil temperature increases. Adjust
the travel speed by accelerator operation.
OPERATION EXPLANATION OF COMPONENTS
3-21
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