Hitachi ZW 120-6 Operator's Manual page 359

Disconnecting/connecting hydraulic hose
When activating an attachment with a hydraulic cylinder other
than the lift arm cylinder or bucket cylinder using the machine
hydraulic pressure oil, hydraulic hoses must be connected
or disconnected. At this time, connect or disconnect the
hydraulic hoses following the procedures below.
Procedures
d
CAUTION: Before starting to work, apply the parking
brake and stop the engine. Operate the attachment
control lever several strokes to release any hydraulic
oil pressure remaining in the circuits.
IMPORTANT: Thoroughly remove dirt or stains from the
hydraulic hose connectors.
• Connect the attachment hydraulic hoses to the machine
hydraulic pipe lines.
• After connecting the hydraulic hoses, start the engine.
While operating the attachment control lever, slowly move
the attachment. Check that no oil leaks from the hydraulic
hose connectors.
• When the attachment is removed, joint the attachment
hose female end to the male end. Put dust caps to the
machine hydraulic pipe line female and male ends to
prevent the pipe line ends from becoming contaminated.
OPTIONAL ATTACHMENTS
HYDRAULIC TYPE QUICK COUPLER OPERATION
Plug (Male)
When connecting hoses, insert the plug while
pulling the sleeve. When the sleeve is returned,
the hose connectors are automatically locked
and connected.
When disconnecting the hoses, pull the sleeve.
The connectors are instantaneously separated.
Dust cap
When installing the dust cap to or removing
the dust cap from the female type hose end,
pull on the sleeve.
When installing the dust cap to the male type
hose end, just connect it to the hose end.
13-3
Sleeve (Female)
M4GB-13-007
M4GB-13-008
Sleeve (Female)
M4GB-13-009
M4GB-13-010