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Section E Hydraulics
9803/3280
Section E
3 - 35
Issue 1
Basic System Operation
Hydraulic Circuit Schematic
Precision Control (Servo)
(Machines from January 2003)
The schematic shows the pilot circuit for Precision Control
(Servo) machines. For the main system hydraulics refer to
relevant pages.
Note: The boom and dipper services are interchanged for
the ISO control pattern.
Component Key:
Small letters on the schematic indicate port markings. Refer
to Technical Data pages at the begining of this section for
more information. Ports A and B are always identified as
service ports (feed and return from respective ram).
4 Excavator Valve Block
19 Stabiliser Ram R.H.
20 Stabiliser Ram L.H.
21 Hydraclamps (Sideshift Only)
22 Boom Ram (Dipper ISO)
23 Slew Ram R.H.
24 Slew Ram L.H.
25 Dipper Ram (Boom ISO)
26 Bucket Ram
27 Extending Dipper Ram
30 Joystick Controller L.H.
31 Servo Pressure Supply Valve
32 Joystick Controller R.H.
33 Stabiliser Control R.H.
34 Stabiliser Control L.H.
35 Footpedal Control (Extending Dipper)
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