Komatsu WA600-8 Operation & Maintenance Manual page 488

HANDLE STEERING WHEEL SPEC MACHINE
METHOD FOR ENGINE WARM-UP OPERATION
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If the oil temperature is low in a cold weather, the response
of machine for the control of the steering wheel is slow,
and the machine may move differently from the operator's
intension.
In such case, use the frame lock bar to secure safety, and
perform the warm-up operation in a large place. At that
time, be sure not to relieve the oil pressure in the circuit
for more than 5 seconds.
NOTICE
• Do not accelerate the engine abruptly until it is warmed up.
• Do not run the engine at low idle or high idle with no load for 20 minutes or more. This will have an
adverse effect on the environment and also on the internal structure of the engine. If it is necessary
to run the engine at idle for 20 minutes or more, apply a load from time to time or run at a medium
speed.
• Turn the steering wheel a little and stop at certain position. Check that the machine has turned by
the angle corresponding to the turning angle of the steering wheel.
After the engine starts, do not start operating the machine im-
mediately. First, perform the following operations and checks.
1.
Depress accelerator pedal (1) lightly and run the engine at
a medium speed for approximately 5 minutes with no load.
2.
In a cold weather, perform the warm up operation of the
hydraulic component after warming up the engine.
Check that the engine rotation is smooth, then operate the
following warm up operation of the hydraulic component.
1)
Press (a) of work equipment lock switch (2) and un-
lock the work equipment.
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WARNING
ATTACHMENTS AND OPTIONS