Excavator Valve
Precision Control (Servo)
(Machines up to serial no. 931159)
Component Key:
A
Inlet Port
B
Outlet Port
C
Centering Spring
D
Integral Load Sensing Valves (Isolator Compensator
Spools)
E
Bypass Compensator Valve
F
Load Sense Drain Regulator and Relief Valve
G
Hydra-clamp Solenoid Valve
H
Pilot Operated Check Valve
J
Load Sense Drain Port
4A
Slew Spool
4B
Boom Spool
4C
Stabiliser Spool
4D
Stabiliser Spool
4E
Dipper Spool
4F
Bucket Spool
4G
Aux. Spool (not used on some machine variants)
8 - 13
Section E
9803/3280
Section E
8 - 13
Issue 2*
Circuit Descriptions
A402510
4F
4E
4D
4C
4B
4A
A
B
C
4G
E
*