2-67
CONTROLS
Selector valve
Open ....... When using a hydraulic breaker
(1-way flow)
Closed ..... When using a reversible
attachment (2-way flow)
Change the direction of the hydraulic oil flow
by opening or closing the selector valve (1)
inside the right side cover.
For the machine with the auxiliary 1st auto
tank switch, use the switch to select the
flow.
Refer to “Auxiliary 1st auto tank switch (If
equipped)” on page 2-42.
ACCESSORIES
Third auxiliary hydraulic switch and
button (If equipped)
The third auxiliary hydraulic lines are normally
used to control the “quick attachment”
installed to connect/disconnect the bucket.
When the safety lock lever is released after
the engine is started, hydraulic oil flows into
the pipe (e). This allows the pressure in the
(e) side to increase and to prevent the pin
inserted on the bucket from coming out. If
the pressure in the (e) side drops, the alert
that the bucket may come out is indicated by
the warning lamp and the alarm. For a safety
reason, the bucket can be disconnected only
when the button (1) and the switch (2) are
pressed at the same time. When they are
pressed, the hydraulic oil flows into the line (f)
to increase the pressure there. As the result,
the pin on the bucket comes out and the
bucket is removed from the machine.
• Bleeder unit for simultaneous use with
the auxiliary 1st and 2nd (if equipped)
Pressing both the auxiliary 3rd button (1)
and the switch (2) makes it possible to
release internal pressure from the auxiliary
3rd (e side), auxiliary 1st and auxiliary 2nd
at the same time. (The pressure is kept
drawn for six seconds after the button and
the switch are released.) This enables
faster attachment change.
To Next Page
Loading...
