3.
Set the working mode to P mode (heavy-duty operation
mode).
The hydraulic component is warmed up quickly.
For the details of the working mode setting procedure, see
“WORKING MODE SELECTOR SWITCH (3-45)”.
4.
Move lock lever (3) slowly to FREE position (F), then raise
the bucket from the ground.
5.
Turn fuel control dial (4) to a position midway between Low
idle (MIN) and High idle (MAX).
6.
Operate the work equipment to warm up the hydraulic
components.
NOTICE
When the work equipment is operated, take care that it
does not interfere with the machine or ground.
1)
Move R.H. work equipment control lever (5) slowly in
the direction of bucket CURL position (D). Operate the
lever to the end of its stroke and hold it in the position
for 30 seconds.
2)
Move R.H. work equipment control lever (5) slowly in
the direction bucket DUMP position (C). Operate the lever to the end of its stroke and hold it in the
position for 30 seconds.
3)
Next, move L.H. work equipment control lever (6) slowly in the direction arm IN position (B). Operate
the lever to the end of its stroke and hold it in the position for 30 seconds.
4)
Move L.H. work equipment control lever (6) slowly in the direction arm OUT position (A). Operate the
lever to the end of its stroke and hold it in the position for 30 seconds.
7.
Repeat the operation of step 6 for 5 minutes.
8.
Check that hydraulic oil temperature caution lamp (7) displays proper temperature.
If the hydraulic oil temperature caution lamp is not displaying the proper temperature (it is displaying low
temperature), repeat steps 6 to 7 until the monitor displays the proper temperature.
OPERATION MACHINE OPERATIONS AND CONTROLS
3-181
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