jcb JS300 Service Manual page 724

Replacement
Replacement is the reversal of removal procedure but note
the following:
– When fitting a new pump, the shaft end spline may be
coated with a anti-rust coating. Remove this coating
with a suitable cleaning agent and apply a lubricant to
the shaft being careful not to get either on to the oil
seal of the pump.
– The bevelled edge of the pump coupling 4 must be
fitted facing the pump.
– To prevent the rubber flange 5 from twisting on
installation, apply a small amount of lubricant to the
under face axial and radial screws
– Locate the rubber flange 5 of the pump into the four
engine studs 8.
– Before fastening pump flange 2 to engine, make sure
the mating surfaces are fully together.
– Apply JCB Threadlocker to bolts 3 and 6.
– Fill the pump casing inside fully with oil and operate
at low engine revs with no services selected for 3
minutes.
!M
WARNING
Fluid Under Pressure
Fine jets of fluid at high pressure can penetrate the
skin. Keep face and hands well clear of fluid under
pressure and wear protective glasses and gloves.
Hold a piece of cardboard close to suspected leaks
and then inspect the cardboard for signs of fluid. If
fluid penetrates your
immediately.
INT-3-1-10_3
– If there is any air left in the circuit or pump, this may
cause faulty operation or damage so be sure to bleed
the air completely.
– It is not desirable to leave the pump motor unused for
a long period of time (more than one year.) At
intervals, start the engine even if for short periods of
time. When left unused by itself, rotating the shaft end
by hand can be effective. If left unused for an
extended period of time, inspection for overhaul will
become necessary.
E-63
skin, get medical help
Hydraulic Pump Removal and Replacement
9813/5100-1
Section E - Hydraulics
Hydraulic Pump/Regulator
E-63