Optional Equipment
Safety, Operation and Maintenance Manual - Aug 2012
8-7
SY115C9/135C/155H Crawler Hydraulic Excavator
8.2.1.2 Selector valve
Selector valve changes
fl
owing direction of hy-
draulic oil.
The change of direction is made according to
the working mode selected. The working mode
must be applicable to the installed optional
equipment. For changing the working mode,
see
“
Hydraulic circuit
”
on page 8-8
.
CZ335-1105003
Fig. 8-3
Control pedal is used to control the optional
equipment.
When the front, center, or rear of the pedal is
pushed down, the optional equipment will op-
erate as the following.
Hydraulic breaker
Front (A): Operate
Center (N): Stop
Rear (B): Stop
For other optional equipment, consult its man-
ufacturer for installation in order to con
fi
rm the
operation of pedal and optional equipment be-
fore operating your machine.
Do not operate when placing your foot on
the pedal. If the pedal is pushed mistaken-
ly, the optional equipment will move sud-
denly and cause severe accidents.
N
B
A
CZ335-1105004
WARNING
8.2.1.3 Control pedal
Fig. 8-4