Komatsu D61EX-24 Operation & Maintenance Manual page 245

MACHINE OPERATIONS AND CONTROLS
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 perform operations or operate the levers sharp-
ly while the hydraulic oil is at low temperature. Always
perform the warm-up operation until the hydraulic oil
temperature caution lamp shows the green display.
This will extend the service life of the machine.
Do not accelerate the engine abruptly until it is
warmed up.
• Do not run the engine at low idle or full throttle with no
load for 20 minutes and more. This will have an ad-
verse effect on the environment and also on the inter-
nal structure of the turbocharger and engine. If it is
necessary to run the engine at idling, apply a load
from time to time or run at a medium speed.
• If the engine oil pressure caution lamp on machine
monitor (2) lights up or the alarm buzzer sounds inter-
mittently, stop the engine and perform inspection.
1.
Turn fuel control dial (1) to a position midway between Low
idle (MIN) and High idle (MAX).
The engine runs at a medium speed.
2.
Run it with no load (perform warm-up operation) for ap-
proximately 5 minutes.
3.
After the warm-up operation, check that each gauge and
caution lamp indicate the normal values.
If any problem is found, perform maintenance or repair.
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OPERATION