jcb JS300 Service Manual page 767

Inspection
Note: Before assembling the remote control valve make
sure that a thorough inspection of all the components is
carried out. Remember that although a failed component
may be easy to identify, the cause may be less easy to
trace. It is also possible that a failed component may have
caused damage to other areas of the valve.
1 Carefully clean all components using a suitable
degreasing agent.
2 Carefully inspect all components for signs of
excessive wear or damage. If wear or damage is
evident, components must be renewed.
Note: `O'-rings and other sealing materials should
preferably be replaced
disassembled but they may be re-used provided a careful
check is made that they are un-damaged.
Assembly
Note: During assembly, ensure all parts are clean and free
from burrs and scratches. Remove minor damage by
lapping.
Note: Renew all `O'-rings, seals and back-up rings. Take
care to install seals the correct way around.
Note: During assembly apply hydraulic oil to `O'-rings and
seals.
Note: Ensure all screws and bolts are tightened to the
torque settings given.
The numerical sequence given previously is a guide to
dismantling. For assembly the sequence should be
reversed noting the following details:
1 Locate retaining plate 18 onto plunger guides 8 and
using the jig, screw knuckle joint into position.
2 Locate rocker plate 25 and tighten until it makes
contact with the plungers 11. Ensure the plungers are
not depressed at this stage.
3 Holding the rocker plate 25 in its position, screw down
joint nut 24.
4 Ensure the switch cable is free from obstruction and
the line connectors are securely fastened.
E-106
each time the valve
24
25
is
26
18
Item
6
24
25
26
27
9813/5100-1
Section E - Hydraulics
Hydraulic Control Levers
Dismantling and Assembly
P
6,7
Fig 5.
Nm Kgf m
40 4
68 7
30 3
30 3
20 2
1
JS03250-C1
lbf ft
29.5
50
22
22
14.7
E-106