Hitachi ZW 120-6 Operator's Manual page 358

Installation
d
WARNING: Complete installation work only after
checking that both right and left coupler pins (1) have
been correctly installed.
d
WARNING: Before leaving the machine apply the
parking brake.
1. After checking that coupler pin (1) is removed, slowly
bring the machine close to bucket (attachment) hook (3)
and install the quick coupler to the hook.
2. Slightly raise lift arm (4). Slowly tilt the bucket
(attachment) backward by operating the bucket cylinder
until stopper (5) comes in contact with the coupler.
3. While pulling to slide lock switch, continue to press
switch installation position to install coupler cylinder pin
(1).
f
NOTE: In case the newly installed attachment uses an
additional hydraulic cylinder other than the bucket and/or lift
arm being already installed, connect the hydraulic hoses to
the additional cylinder in advance.
OPTIONAL ATTACHMENTS
HYDRAULIC TYPE QUICK COUPLER OPERATION
1
3
13-2
1
M4GB-13-003
M4GB-13-004
4
M4GB-13-005
1
5
M4GB-13-006
3