Torque Settings
Item Nm kgf m lbf ft
1 13.5 1.4 10
3 24.5 2.5 18
5 13.5 1.4 10
11 5.5 0.5 4
13 24.5 2.5 18
61 - 5
Section E
Hydraulics
9803/3280
Section E
61 - 5
Issue 2*
Excavator Valve
Dismantling and Assembly
Hydraclamp Valve - (Sideshift Machines)
(Not Precision Control Machines)
The numerical sequence shown on the illustration is intended
as a guide to dismantling. For assembly the sequence
should be reversed.
The following points MUST be avoided when dismantling
and assembling the valve:
• CONTAMINATION
• DAMAGE TO POPPET AND SEAT
• DAMAGE TO SEAL GROOVES
All or any of the above points may result in possible
problems with the valve.
When removing 'O' rings and seals, use an appropriately
rounded tool that WILL NOT cause any damage to the seal
grooves. Discard ALL 'O' rings DO NOT use worn or
damaged items.
Note that the hydraclamp comprises two separate valve
assemblies; 1) the check valve assembly (items 1 to 8); 2) the
solenoid assembly (items 11 to 14).
Dismantling
Loosen nut 1 (turn anti-clockwise) and then remove the
check valve assembly from the valve block. If required, the
check valve assembly can be dismantled into its component
parts (items 1 to 8).
Inspect the valve components for scratches, nicks or any
other type of damage, particularly on the poppet and seat
faces. Replace with new if required.
Assembly
Renew all 'O' rings. The parts microfiche will identify the
correct seal kit part numbers for items 2, 2A, 4, 6, 10 and 14.
Fit seal 2A with the recess towards ‘O’ ring 2, as shown at A.
Lubricate parts with JCB Hydraulic Fluid before assembling.
Make sure that all the parts move freely.
Ensure that the small drilling through the centre of item 3, is
clear.
Do not over-tighten the solenoid assembly, it may affect the
operation of the solenoid, use the spanner flats and torque
tighten to figure indicated in the table below (items 11 and
13).
Check the operation of the electric hydraclamp, refer to
Circuit Descriptions, Excavator Valve - Manual Control -
Hydraclamp Valve Operation.
S217500
13
12
11
14
10
9
5
6
7
8
3
1
2
4
2A
A
2
2A
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