![background image](http://html1.mh-extra.com/html/jcb/js70/js70_service-manual_3631821123.webp)
3 - 26
Attachment - Dipper Out
Pressurised oil from port
A1
(front pump) enters port
5P
of the control valve. Pressurised oil from port
A2
(rear
pump) enters port
4P
of the control valve.
When operating dipper out with the left hand joystick,
the pilot pressurised oil flows through the cushion valve
into port
5Pb2
and switches dipper spool
(1)
and dipper
spool
(2)
.
When switching each spool, the pressurised oil from
port
4P
and port
5P
is merged inside the control valve
and high speed is achieved.
Section E
Hydraulics
9803/6020
Section E
3 - 26
Issue 1
Schematics
A
Pressure Lines
B
Return Line
C
Pilot Line
D
Control Valve
E
Dipper ram
F
Dipper (1)
G
Cushion Valve
H
Pump
J
Dipper (2)
Summary of Contents for JS70
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Page 189: ...Section E Section E Hydraulics 9803 6020 Issue 1 33 4 33 4 Control Valves Control Valve 291360...