Komatsu WA380-8 Operation & Maintenance Manual page 252

MACHINE OPERATIONS AND CONTROLS
When there is an abnormal noise at the engine startup and if that condition continues, the engine may be dam-
aged. In that case, ask your Komatsu distributor to check the engine as soon as possible.
METHOD FOR CHECKING LOW-SPEED RUN AND ACCELERATION OF ENGINE
When stopping the machine during the normal traveling operation, check that the engine does not hunt or stop
suddenly.
When the accelerator pedal is depressed, check that the engine speed rises smoothly.
• Perform these checks in a safe place, watching out for danger in the surroundings.
• When the engine performs very badly at low idle and in the acceleration and if that condition continues, it
may damage the engine or confuse the operator's sense of driving or lower the braking efficiency, and as a
result lead to an unexpected accident. In that case, ask your Komatsu distributor to check the engine as
soon as possible.
REMARK
• The smell of the exhaust gas is different from that of the conventional diesel engine because of the exhaust
gas aftertreatment devices.
• White smoke may be discharged for a short time immediately after the engine is started or during the after-
treatment devices regeneration in the cold season, but this is not a failure.
METHOD FOR TESTING PARKING BRAKE
Check that the parking brake works properly.
If any problem is found in operation, ask your Komatsu distributor for adjustment.
METHOD FOR CHECKING BRAKE
Drive the machine forward and in reverse slowly on a level ground with no obstacles around and check the
brake performance.
If any problem is found in operation of the brake, ask your Komatsu distributor for adjustment.
METHOD FOR CHECKING CLEARANCE BETWEEN BRAKE PEDAL AND FLOOR
Depress the brake pedal fully and check that the pedal is not too close to the floor. Also check that the feeling
when operating the brake pedal is normal.
If any problem is found, ask your Komatsu distributor for adjustment.
METHOD FOR CHECKING ABNORMAL POINTS DETECTED UP TO PREVIOUS
DAY
Check the area which was abnormal when the machine was used previous day.
If there is any abnormality, ask your KOMATSU distributor for testing and repair.
METHOD FOR RUNNING-IN THE NEW MACHINE
NOTICE
Your Komatsu machine has been thoroughly adjusted and tested before shipment from the factory.
However, operating the machine under full load before running in the machine can adversely affect the
performance and shorten the machine life.
Be sure to run in the machine for the initial 100 hours (as indicated on the service meter).
Make sure that you fully understand the descriptions in this manual, then run in the machine while paying atten-
tion to the following points.
• Idle the engine for 5 minutes after starting it up.
• Avoid operation with heavy loads or at high speeds.
• Immediately after starting the engine, avoid sudden starts, sudden acceleration, unnecessary sudden
stops, and sudden changes in direction of the machine.
FOR ORDINARY OPERATION
After the engine starts, do not start operating the machine immediately. First, carry out the following operations
and checks.
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OPERATION