Main Pump - jcb 2CX Service Manual

Section E
30 - 1
Removal and Replacement
Before removing and dismantling the pump, check flow and
pressure. If either of these are low and cannot be corrected
at the relief valve, the pump must be renewed completely.
Renewal of components such as gears, bearings and
housing will not effect a permanent cure. If the pump output
is satisfactory but there is external leakage, the pump should
be removed and dismantled for re-sealing only.
Removal
! ! WARNING
Raised loader arms can drop suddenly and cause
serious injury. Before working under raised loader arms,
fit the loader arm safety strut.
GEN 3-2
1 Raise the loader arms and fit the loader arm safety
strut. If hydraulic pressure is not available, select 'lift
arms raise' on control lever whilst lifting arms with a
suitable hoist.
2 Disconnect the battery.
3 Open the left hand side engine panel.
! WARNING !
Make the machine safe before getting beneath it. Ensure
that any fitments on the machine are secure; engage the
parking brake, remove the starter key, disconnect the
battery.
INT-3-3-8
4 Operate the controls to vent residual pressure.
5 Disconnect and plug outlet hose A.
6 Disconnect and plug inlet hose B.
7 Undo bolts C, remove pump from machine.
Replacement
Replacement is a reversal of the removal procedure.
1 Use a new gasket between pump and engine.
2 After fitting a new or serviced pump and before starting
the engine screw the MRV out 4 full turns, and carry out
the MRV setting procedure, refer to Service
Procedures, Pressure Testing - MRV.
For dismantling and assembly procedure refer to Main
Pump - Dismantling and Assembly.
9803/7130
Hydraulics

Main Pump

C
Section E
www.maskinisten.net
30 - 1
A395100
A
B
A230520
Issue 1