50 - 1
Section D
9803/3280
Section D
50 - 1
Issue 1
Precision Control (Servo)
Joystick Controllers
Removal and Replacement
!
DANGER
Hydraulic fluid at system pressure can injure you. Before
disconnecting or connecting hydraulic hoses, stop the
engine and operate the controls to release pressure
trapped in the hoses. Make sure the engine cannot be
started while the hoses are open.
INT-3-1-11/1
Note that the procedure shows the left hand joystick
controller. The removal and replacement procedure for the
right hand joystick controller is identical.
Removal
1
Park the machine on firm level ground, engage the
parking brake and set the transmission to neutral.
Lower the attachments to the ground and stop the
engine.
Before attempting to remove a joystick controller, vent the
pilot circuit accumulator hydraulic pressure as follows:
2
With the operator seat locked in the rear facing position
and with the arm rests raised forward (for backhoe
operation), switch the starter to ON without starting the
engine. Operate the joystick controls several times to
vent the hydraulic pressure from the servo system and
backhoe rams. Turn the starter switch to the OFF
position and remove the key.
3
Remove the screws
A
(4 off) and lift off the top retaining
plate as shown.
4
Using a screwdriver, carefully prise out the plastic cap
B
. Remove the screws
C
(2 off) and take off the lower
cover to reveal the connections at the valve block.
5
Disconnect the electrical harness connector for the
joystick handle switches.
6
Disconnect all hydraulic hoses from the valve block and
plug the ports to prevent ingress of dirt. Label each
hose before disconnecting to ensure correct
replacement. Plug hose ends to prevent ingress of dirt.
7
Carefully prise back the rubber gaiter
D
to reveal the
fixing bolts (4 off) securing the valve to the arm rest.
Remove the fixing bolts and lift the valve assembly from
the seat.
Replacement
Replacement is the reverse of the removal sequence.
Note:
All hydraulic adaptors that are installed together with a
bonded sealing washer must also have JCB Threadseal
applied to the threads of the adaptor.
A405620
D
C
A
B
