Shindaiwa SP45BPE Manual De Uso Y Cuidado página 8

PUMP DISASSEMBLY AND REBUILD
Agitator
Bar
Figure 1
Boot
Retainer
Nut
Ball
Figure 2
Pressure
Chamber
Pump
Locking
Ring
Figure 3
Pressure
Plunger
Check
Chamber
Cup Valve
Pump Handle Clip
Figure 4
Flat side
Seal
Ball
Counterbore Side
Figure 5
1) E nsure the tank and pressure chamber contents are emptied and pressure
has been released in the pressure chamber. To release pressure in the pressure
chamber activate shut-off valve and release all pressure.
2) Reach into tank fill opening and remove agitator bar from pressure chamber
body (Figure 1).
3) Disconnect linkage arm from the top of the pump assembly (see section cov-
ering Installing The Pump Handle). (Figure 2).
4) Loosen pump locking ring and remove entire pump assembly from tank
(Figure 3).
Check Valve
Remove check valve cartridge assembly from bottom of pressure chamber utilizing
pump handle clip (clip has flat blade incorporated into end). Place flat blade into
slot in bottom of cartridge and unscrew. Once cartridge has been removed it can
either be replaced as an assembly or rebuilt. To rebuild disassemble two halves
of cartridge and replace seal and/or ball (Figure 4 and 5). The seal mounts inside
the larger of the two halves of the cartridge. The seal counterbore side mounts
into the grooves in the cartridge half. Pump performance my be affected if this is
not assembled correctly.
Plunger Cup
Once the check valve has been removed the plunger cup can be replaced as the
check valve housing holds the plunger cup in place to the bottom of the pressure
chamber body. The bottom of the pressure chamber body has a groove in it to
accept the raised ring on the plunger cup. It is important to ensure that these
two surfaces are aligned and mated before tightening the check valve. Pump
performance may be affected if this is not assembled correctly.
7E