SANY SY500H, Operation And Maintenance Manual

Page: 52 / 196

3-22
MACHINE CONTROLS
SY500H Excavator OMM
• If the engine is shut down and then restarted, the
auto-idle function is automatically reactivated.
NOTE: To enable or disable the auto-idle press function
key F2. See “Home Screen Function Icons and
Buttons” on page 3-27.
Stop Valve
0004953
Figure 3-38
0004808
Figure 3-39
Two stop valves (1) are mounted on the arm to aid in the
removal and installation of optional equipment by
shutting off hydraulic flow when optional equipment is
removed.
NOTE: The right side of the arm stop valve is shown. The
left is side is similar.
NOTE: The stop valve is shown in the closed position. To
open the valve, turn the valve knob (2)
counterclockwise until the stop (4) makes contact
with the stop pin (3).
Return Flow Selector Valve
0004988
Figure 3-40
The return flow selector valve (1) has a one-way or a
two-way position for operating optional attachments. It is
on the left side of the hydraulic oil tank.
The return flow selector valve is adjusted as follows:
• Move the lever toward the rear of the machine
(position shown) for one-way flow position.
• Move the lever toward the front of the machine for
two-way flow position.
A variety of optional one-way and two-way flow
attachments are available for use on this machine. A
breaker is an example of a one-way flow attachment, and
a shear is an example of a two-way flow attachment.
1
4
2
1
3
1