Komatsu WA500-6H, Operation & Maintenance Manual, Page: 177 / 412

Operation 3.3 Operation
WA500-6H – VEAM430100
3-111
Normal operation
After starting the engine, do not immediately start operations.
First, carry out the following operations and checks.
NOTE
Do not suddenly accelerate the engine before the warming-up
operation is completed.
Do not run the engine at low idling or high idling continuously for
more than 20 minutes.
If it is necessary to run the engine at idling, apply a load from
time to time or run the engine at a mid-range speed.
1. Immediately after starting the engine, without depressing the
accelerator pedal (1), run the engine at idle for at least 10
seconds during the warm weather and for at least 15 sec-
onds during the cold weather.
2. Depress accelerator pedal (1) lightly and run the engine with
no load at midrange speed for about 5 minutes.
3. In cold weather only, carry out the following operation to
warm up the hydraulic oil.
After carrying out the warming-up operation, check that the
engine rotation is smooth, then set work equipment lock
lever (2) to the FREE position. Operate bucket control lever
(3) for 30 seconds, then operate lift arm control lever (4) for
30 seconds. Operate these levers fully in turn for 5 minutes
to warm up the hydraulic oil.
If this method is used, the hydraulic oil is warmed up more
quickly.
4. After carrying out the warming-up operation, check that the
meters, gauges and pilot lamps work properly.
If there is any abnormality, carry out maintenance or repair.
Run the engine under a light load until engine cooling water
temperature gauge (5) and torque converter oil temperature
gauge (6) are in the green range.
5. Check that there is no abnormal exhaust gas color, noise or
vibration. If any abnormality is found, contact your
KOMATSU distributor.
GK050125
1
3
4
2
GK050127
GK050006
Free
Lock
2
4
3
GK050027
5 6