Komatsu PC490-11, Инструкция по установке и эксплуатации

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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.
• 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.
REMARK
• The smell of the exhaust gas is different from that of the conventional diesel engine because of the exhaust
gas filtering function.
• 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.
• When the hydraulic oil temperature is low, the engine speed and engine output at high idle are set to low to
protect the components. When the hydraulic oil temperature becomes proper level, the engine speed and
engine output at high idle are raised and the machine operates normally.
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.
METHOD FOR ENGINE WARM-UP OPERATION
NOTICE
• Do not accelerate the engine abruptly until it is warmed up.
• Do not run the engine at low idle or high idle under no load for more than 20 minutes. This will have
an adverse effect on the environment and also on the internal structure of the engine. If it is neces-
sary to run the engine at idle for 20 minutes or more, apply a load from time to time or run at a medi-
um speed.
This machine is equipped with an automatic engine warm-up system, so if the engine coolant temperature is
30 °C or less after the engine is started, the engine warm-up operation starts automatically. When the engine
automatic warm-up operation starts, the engine speed is maintained higher than the normal speed at low idle.
If the engine coolant temperature goes 30 °C or more or if the warm-up operation is continued for more than 10
minutes, the automatic warm-up operation is canceled and the engine speed drops to the normal speed at low
idle.
Do not start operating the machine immediately. First, perform the following operations and checks.
OPERATION MACHINE OPERATIONS AND CONTROLS
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