jcb ROBOT 150, Service Manual

Page: 198 / 254

16 - 2
Loader Valve
Removal
On machines prior to serial number 677001 (upper
illustration), remove the seat and floor plate. On machines
after 677001 (lower illustration), open the engine
compartment rear door and top cover.
! !
WARNING
Hydraulic Pressure
It is not possible to vent all residual pressure. Loosen the
connection one full turn and allow the pressure to
dissipate. Keep face and hands well clear of pressurised
hydraulic oil and wear protective glasses.
HYD 4-3
Before working on the hydraulic system ensure that the
engine is switched off and the starter key removed.
Operate the controls a few times to allow hydraulic pressure
to dissipate. If necessary "crack" one of the hose connections
to ensure that all pressure has gone. Drain the hydraulic
tank.
1
Disconnect the hydraulic inlet at
A
and the outlet at
B
.
Cover exposed connections to prevent ingress of dirt.
2 Remove the hoses from the work ports at C (6 off).
Cover exposed connections to prevent ingress of dirt.
3 On servo machines, remove the hoses from the
directional control ports
D (4 off). Cover exposed
connections to prevent ingress of dirt.
4 On manual control machines, disconnect the control rods
from the spools.
5 On servo machines fitted with three spool valves,
disconnect the solenoids at
E (2 off). Mark the
connectors to ensure correct reconnection.
6 Remove 4 nuts F and lift the valve block from the
machine.
Replacement
Replacement is a reversal of the removal procedure.
Ensure all hoses and ports are clean and free from dirt.
Torque nuts
F to 56 Nm (5.7 kg fm, 42 lbf ft)
Section E
Hydraulics
9803/8500
Section E
16 - 2
Issue 4*
Valves
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