Excavator Valve Neutral Circuit - jcb 2CX Service Manual

Section E
7 - 1

Excavator Valve Neutral Circuit

Component Key: (JCB 'X' Control Pattern)
A Inlet
B Load Hold Check Valves
X Parallel Gallery
4A Slew Spool
4B Boom Spool
4C Stabiliser Spool
4D Stabiliser Spool
4E Dipper Spool
4F Bucket Spool
Note: Machines with ISO control pattern have the boom and
dipper spools interchanged.
9803/7130
Hydraulics
Circuit Descriptions
Oil from the loader valve enters the excavator valve at A
and flows through the neutral gallery and around the waists
of the solid spools. It also fills the parallel gallery X but is not
at a high enough pressure to open the load hold check
valves B.
Section E
www.maskinisten.net
7 - 1
Issue 1