![background image](http://html1.mh-extra.com/html/jcb/js130/js130_service-manual_3610745282.webp)
33 - 4
Dipper (AM) Operation
When pilot pressure is applied to port
bl3
, by operating the
left hand joystick controller, the spool
E
moves to the right
closing off the neutral gallery
F
. Oil from the pump
P1
is
directed to the outlet port
BL3
by lifting check valve
G
. At
the same time, pressure is appiled to the centre bypass
valve
J
. This causes oil from pump
P2
, flowing through the
neutral gallery
F
, to be re-directed into the dipper circuit.
Therefore the high pressure flow from both pumps is used
to raise the dipper. Oil returns to tank via port
AL3
.
When pilot pressure is applied to port
al3
, the reverse
operation occurs.
Section E
Hydraulics
9803/6410
Section E
33 - 4
Issue 1
Control Valve
JS01720
Summary of Contents for JS130
Page 65: ...Section 3 Section 3 9803 6410 Issue 1 9 1 9 1 Routine Maintenance Component Location Diagram...
Page 118: ......
Page 119: ...3 1 Section C Electrics 9803 6410 Section C 3 1 Issue 1 Layout Operator s Cab...
Page 142: ...5 3 Section C Electrics 9803 6410 Section C 5 3 Issue 1 Pump Control FLOW CHART...
Page 207: ......
Page 209: ......
Page 210: ...3 4 Section E Hydraulics 9803 6410 Section E 3 4 Issue 2 Schematics Shuttle Block...
Page 532: ...Contents Page No Technical Data 1 1 i Engine 9803 6410 i Issue 1 Section K Section K...