Komatsu HM400-5, Operation & Maintenance Manual

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REMARK
If a password is set, the password enter screen is displayed on
the monitor screen, but the preheating pilot lamp lights up as
on the standard screen.
TURBOCHARGER PROTECTION FUNCTION
Since the turbocharger is a device that rotates at a very high speed, seizure results if it is not lubricated well.
In order to protect above trouble, the turbo protect function restricts increase of the engine speed immediately
after the engine is started until its oil pressure reaches an appropriate level.
• While the turbo protect function is operating, increase of the engine speed is restricted even if the accelera-
tor pedal is depressed.
• The turbo protect function operates as long as 20 seconds.
METHOD FOR OPERATIONS AND CHECKS AFTER STARTING ENGINE
METHOD FOR CANCELING TO HOLD DUMP BODY
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WARNING
If HOLD is canceled when the dump body is raised, the body will go down under its own weight. This is
very dangerous.
Always lower the dump body before stopping the engine.
If the engine is stopped, the body will stay in “HOLD” condition, regardless of the position of the dump lever.
If the engine is started in this condition, the dump body float caution lamp will light up.
Return the dump control lever to “HOLD” position, then move it to “FLOAT” position to cancel the dump body
“HOLD” condition.
When the dump body is set to “FLOAT” condition, the body float caution lamp will go out.
METHOD FOR CHECKING STARTING CONDITION AND UNUSUAL NOISE OF
ENGINE
• When starting the engine, check that the engine causes no abnormal noise and that it starts up easily and
smoothly.
• Check that there is no abnormal noise when the engine is idling or when the engine speed rises slightly.
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
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CAUTION
• 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 contin-
ues, it may damage the engine or confuse the operator's sense of driving or lower the braking effi-
ciency, and as a result lead to an unexpected accident. In that case, ask your Komatsu distributor to
check the engine as soon as possible.
OPERATION MACHINE OPERATIONS AND CONTROLS
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