24
309044
Pump Service
XR Inlet Valve Replacement Kit 243093 / XR Outlet Valve Replacement Kit 243094
CAUTION
When repairing or cleaning the pump, never submerge the pump in water or allow fluid to enter the pressure control.
If the sprayer continues to cycle (motor and pump run) when the spray gun trigger is released, or if performance is
poor even with new spray tips and clean filters, the pump inlet or outlet valve may be obstructed or worn.
If a pump valve is worn, replace it as follows:
XR Inlet Valve Replacement Kit 243093
Read all
Installation Notes
in service drawing on
facing page.
1.
Flush sprayer thoroughly.
See
Pressure Relief
Procedure
on page 6.
2.
Relieve pressure.
3.
Remove suction tube fitting from pump inlet valve.
4.
Clean all dried residue from around inlet valve.
5.
Unscrew pump inlet valve from pump.
6.
Apply thin coating of grease or oil to o-ring and
threads on new pump inlet valve.
7.
Thread new pump inlet valve into pump, and
torque to 400 to 450 in-lb (45 to 51 N
S
m).
8.
Reassemble suction tube fitting to pump inlet
valve.
XR Outlet Valve Replacement Kit 243094
Read all
Installation Notes
in service drawing on
facing page.
1.
Flush sprayer thoroughly.
See
Pressure Relief
Procedure
on page 6.
2.
Relieve the pressure.
3.
Remove cover screws and front cover.
4.
Clean all dried residue from around pump outlet
valve.
5.
Unscrew pump outlet valve from pump.
6.
Apply thin coating of grease or oil to o-ring and
threads on new pump outlet valve.
7.
Thread new pump outlet valve into pump, and
torque to 320 to 380 in-lb (36 to 43 N
S
m).
8.
Verify that yoke guide rods are seated properly.
9.
Install front cover and cover screws.
HINT:
Inadequate flushing of paint can cause the inlet
valve check balls to stick to the seat. If the pump does
not prime after 30 seconds of cycling, try tapping the
inlet valve with a small wrench to jar the balls loose.
NOTE:
Excessive shock can fracture or cause other
damage to the pump.
tap here
9564A
To be certain about whether the inlet valve ball is
sticking, you can unscrew the inlet valve from the
pump and check it. M
AGNUM
XR7 and XR9 sprayers
allow for inlet valve removal without removing the
suction tube.
