Komatsu PC308USLC-3E0 Operation & Maintenance Manual page 150

MACHINE OPERATIONS AND CONTROLS MACHINE OPERATIONS AND CONTROLS
3. To complete the warm-up operation of the hydraulic equipment
more quickly, set the working mode to P mode (heavy-duty
mode).
For details of the procedure for setting the working mode, see
"Working Mode Selector Switch (Basic Switch) (PAGE 3-22)".
4. Move lock lever (3) slowly to the FREE position (F), then raise
the bucket from the ground.
5. Turn fuel control dial (4) to a point midway between low idling
(MIN) and full speed (MAX).
NOTICE
When the work equipment is retracted, take care that it does not interfere
with the machine body or ground.
6. Move right work equipment control lever (5) slowly in the
direction to pull in the bucket (D). Operate the lever to the end
of its travel and hold it in position for 30 seconds.
7. Move right work equipment control lever (5) slowly in the
direction to push out the bucket (C). Operate the lever to the
end of its travel and hold it in position for 30 seconds.
8. Next, move left work equipment control lever (6) slowly in the direction to pull in the arm (B). Operate the lever
to the end of its travel and hold it in position for 30 seconds.
9. Move left work equipment control lever (6) slowly in the direction to push out the arm (A). Operate the lever to
the end of its travel and hold it in position for 30 seconds.
10. Repeat the operation in Steps 6 to 9 for 5 minutes.
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OPERATION OPERATION