Komatsu WA800-3E0 Series Operation & Maintenance Manual page 149

OPERATION
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.
During the warming-up operation, check that the engine
rotation is smooth, then set work equipment lock lever (2)
to FREE position (F).
Move bucket control lever (3) in and out of the TILT posi-
tion to warm up the hydraulic oil.
Keep the relief time at the TILT position to a maximum of
10 seconds. If this is done, the hydraulic oil reaches the
relief pressure, so the oil is warmed up more quickly.
4. After carrying out the warming-up operation, check that the
gauges and pilot lamps are normal.
If any abnormality is found, carry out maintenance or
repair.
Run the engine under a light load until the engine water
temperature gauge (4) and torque converter oil tempera-
ture gauge (5) enter the green range.
5. Check for abnormal exhaust gas color, noise, or vibration.
If any problem is found, contact your Komatsu distributor.
OPERATION
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