Method For Operations And Checks After Starting Engine - Komatsu D37EX-24 Operation & Maintenance Manual

OPERATION

METHOD FOR OPERATIONS AND CHECKS AFTER STARTING ENGINE

• If there has been any emergency stop, abnormal actuation or trouble, turn the starting switch key to
OFF position.
• If the work equipment is operated without sufficient warming-up operation of the machine, response
of the work equipment to movement of the control lever will be slow, and the work equipment may
not respond as the operator desires, so always perform the warming-up operation. Particularly in a
cold weather, be sure the warm-up operation is completed.
• If the machine is operated without sufficient warming-up operation, sensors may break because of
frozen DEF tank.
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
• When stopping the machine during the normal traveling operation, check that the engine does not hunt or
stop suddenly.
• Check that the engine speed rises smoothly when the fuel control dial is turned to High idle (MAX) position.
• 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 filtering function.
• Black or white smoke may be discharged for a short time just after the engine is started in the cold
season, but this is not trouble.
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 breaking the machine in can adversely affect the
performance and shorten the machine life.
Be sure to break 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.
• Run the engine at idle for 15 seconds immediately after starting it up.
Do not operate the control levers or fuel control dial during this time.
• Perform warm-up operation for 5 minutes after the engine is started.
• 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.
MACHINE OPERATIONS AND CONTROLS
k k
WARNING
3-155