Komatsu PC138US-11 Operation & Maintenance Manual page 406

QUICK COUPLER SYSTEM
2.
Operate switch (1), and with switch (1) in position "B" press
and hold button (2) on the left hand lever, to activate quick
coupler.
NOTICE
The switch has a safety lock mechanism to prevent ac-
cidental operation. Slide the lock towards you then
rock the switch. The lamp on the switch will come on
and a warning buzzer will sound.
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. The quick coupler will move
to released position.
4.
Position the quick coupler in the mating portion of the
bucket or attachment, moving the bucket cylinder, arm and
boom as necessary.
Follow the quick coupler manufacturer's instructions.
5.
Release button (2).
If the bucket or attachment needs a connection to the hy-
draulic system of the machine, follow all instructions in AT-
TACHMENT REMOVAL AND INSTALLATION.
The quick coupler will lock onto the bucket or attachment, if necessary operate one of the machine control
levers to raise the system pressure.
European safety standards require that it is possible to check the locked position of the quick cou-
pler from the operator's position. Failure to check could cause the death of exposed persons.
Check carefully that all the locking of the quick coupler is complete and secure. Follow the manu-
facturer's instructions carefully, including the installation of any safety device, if required.
6.
Return switch (1) to position "A" (OFF).
The lamp will go off and the buzzer stop.
6-6
WARNING
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WENAM00111
ATTACHMENTS AND OPTIONS