Komatsu PC290LC-11 Operation & Maintenance Manual page 431

ATTACHMENTS AND OPTIONS
(1) Operation switch
REMARK
The switch has a safety lock mechanism to prevent acci-
dental operation. Slide the lock towards you then rock the
switch. The lamp on the switch will come on and a warning
buzzer will sound.
NOTICE
Operation will only take place if button (2) is also
pressed.
(A) : When depressed at this point quick coupler deactivat-
ed. (Lock bucket/attachment)
(B) : When depressed at this point quick coupler is ready
to be activated. (Release bucket/attachment)
2.
With switch (1) in position "B" press and hold button (2) on
the left hand lever to activate quick coupler.
REMARK
When switch (1) and switch (2) are operated together a
warning (3) on monitor appears to inform that the quick
coupler system is activated.
3.
Depending on the design of the quick coupler it may be
necessary to operate one of the hydraulic functions of the
machine (bucket, boom, arm or swing) to raise the pres-
sure in the hydraulic system. If using the swing function ac-
tivate the Swing Lock first. Refer to "SWING LOCK
SWITCH (3-88)"
The quick coupler will now release the attachment/bucket.
QUICK COUPLER SYSTEM
3
KS000874
KS000875
G0018284
G0018285
6-5