Komatsu PC290LC-11 Operation & Maintenance Manual page 364

MAINTENANCE PROCEDURE
10. Set the swing lock switch to ON position (a) and check that
the swing lock pilot lamp is lit.
11. To complete the warm-up operation of the hydraulic equip-
ment more quickly, set the working mode to P mode
(heavy-duty mode).
For the details of the working mode setting procedure, see
"METHOD FOR SELECTING WORKING MODE (3-190)".
12. Move the lock lever slowly and steadily to FREE position
(F), then raise the bucket from the ground.
13. Turn the fuel control dial to a point of 2/3 between Low idle
(MIN) position and High idle (MAX) position.
NOTICE
When the work equipment is operated, take care that it does not interfere with the machine or ground.
14. Operate the work equipment control levers according to
the following procedure.
1)
Move the R.H. work equipment control lever slowly in
the direction to the bucket CURL side (D). Operate the
lever to the end of its travel and hold it in position for
30 seconds.
2)
Move the R.H. work equipment control lever slowly in
the direction to the bucket DUMP side (C). Operate
the lever to the end of its travel and hold it in position
for 30 seconds.
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MAINTENANCE