Komatsu D61EX-24 Operation & Maintenance Manual page 247

MACHINE OPERATIONS AND CONTROLS
3.
Raise the blade to the highest position by operating blade
control lever (2).
4.
Repeat the following relief operations for 5 minutes with
the blade raised to the highest position.
1)
Operate slowly LEFT TILT relief.
2)
Operate slowly RIGHT TILT relief.
5.
Next, repeat the following relief operations for 5 minutes.
1)
Operate blade control lever (2) to RAISE position (a)
(at lever stroke end) and hold it in that position, then
perform RIGHT and LEFT TILT relief operations inter-
mittently.
2)
Lower the blade to the ground.
3)
While pressing FLOAT button, tilt blade control lever (2) to the stroke end to set it in FLOAT position,
and then perform RIGHT and LEFT TILT relief operations intermittently.
4)
Raise the blade to the highest position.
6.
After completing relief operations, lower the blade to the ground.
7.
While pressing FLOAT button, tilt blade control lever (2) to the stroke end, and hold it with your hand for 1
minute.
8.
3 minutes later, set blade control lever (2) to RAISE position (a) and release FLOAT.
9.
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.
10. Operate the machine under light load until the engine cool-
ant temperature gauge and hydraulic oil temperature
gauge on machine monitor (3) indicate green range (A) to
(C).
(A) to (B): Red range
(A) to (C): Green range
(C) to (D): White range
NOTICE
If the hydraulic oil temperature is low, the machine
may deviate a little at moving off or stopping. If it is
necessary to operate the machine when the hydraulic
oil temperature gauge is at white range (C) to (D), be
extremely careful.
11. Check for abnormal exhaust gas color, noise, or vibration.
If any abnormality is found, contact your Komatsu distribu-
tor.
After warm-up operation, run he engine at medium speed and slowly drive forward and reverse so that the
whole equipment becomes uniform temperature.
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OPERATION