Dismantling And Assembly - jcb JS300 Service Manual

Dismantling
K Fig 1. ( T E-221)
1 Remove the pressure switches 1 and plug all orifices
to prevent ingress of dirt .
2 Remove plugs 2 from valve.
3 Using a 5mm Allen key remove valve 3, ball 4 and
seat 5.
4 Repeat steps 2 to 3 to remove the remaining three
shuttle valves.
Inspection
Before assembling the solenoid 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
excessive wear or damage. If wear or damage is
evident, components must be renewed.
Note: Check condition of `O'-rings before assembly.
Assembly
Assembly is a reversal of the dismantling sequence.
1 Lubricate valve 3, ball 4 and seat 5 with clean
hydraulic oil.
2 Apply JCB Threadseal to plugs 2.
3 Tighten components to specified torque.
Hoses ( T E-220)
E-220

Dismantling and Assembly

for signs of
K Table 3.
9813/5100-1
Section E - Hydraulics
Table 2. Pressure Switches
Port Function
S1 Slew Pressure Switch
S2 Boom Up Pressure Switch
S3
C9 Auto Mode Pressure Switch
Table 3. Hoses
Port Function
A1 Swing Right
A2 Swing Left
A3 A3 Multi SH Valve
A4 A4 Multi SH Valve
A5 Dipper Out
A6 Dipper In
A7 A7 Multi SH Valve
A8 A8 Multi SH Valve
B1 Swing Right
B2 Swing Left
B3 Boom Up
B4 Boom Down
B5 Dipper Out
B6 Dipper In
B7 Bucket Close
B8 Bucket Open
C1 Boom Priority Bucket
C2 Boom Load Hold
C3 Dipper Out
C4 Dipper
C5 Arm Load Hold
C6
C7 Swing Lock
C8 Swing Priority
Shuttle Valve
Dismantling and Assembly
Harness Tape
Colour
Red
Yellow
Green
Hose Colour Torque
(Nm)
Violet 47
Orange 47
Blue 47
Red 47
Light Green 47
Pink 47
Yellow 47
Green 47
Violet 47
Orange 47
Blue 47
Red 47
Light Green 47
Pink 47
Yellow 47
Green 47
Light Blue/ 34
Blue
Red/Green 34
Light Green/ 34
Violet
Pink/Violet 34
Pink/Green 34
34
Orange 34
Orange/ 34
Green
E-220