Xylem IM132 R02 RSPA (FSPA) & RJSP Self-Priming Centrifugal Pumps - Manual (Page 7)

7
Maintenance – RSPA
LUBRICATION:
1. The pump requires no lubrication.
2. For the electric motor, refer to instructions provided by
the motor manufacturer.
SEAL REMOVAL:
1. Disconnect electrical service to pump.
2. Relieve system pressure by opening a faucet or drain
valve until water stops flowing.
3. Disconnect pressure switch tubing at the barbed fitting
on the pump case. If tubing does not slide off barbed
fitting easily, cut it as close to the fitting as possible.
4. Remove four cap screws which hold down the pump
seal plate and motor to the pump case. Piping need not
be disturbed.
5. Remove the pumping assembly, as one piece, (motor,
seal plate, diffuser and impeller) by carefully prying
them apart from the pump case. Exercise care as not to
damage impeller.
6. Remove the diffuser from the seal plate, exposing
the impeller.
7. Insert regular slotted screwdriver into the slot in the
motor shaft.
8. While holding the motor shaft with the screwdriver,
unscrew the impeller by turning counterclockwise.
9. Slide rotating part of seal assembly from shaft (as
shown in Figure 3). Separate seal plate from motor.
10. Remove stationary part of seal assembly (including
rubber seal boot) from seal plate.
Maintenance – RSPA
FIGURE 3
CERAMIC SEAL
ROTATING SEAL
CASE BOLT MOTOR SHAFT
SEAL PLATE
O-RING
SEAL BOOT
IMPELLER
DIFFUSER
O-RING
NEW SEAL INSTALLATION:
1. Clean polished surface of stationary seal with a clean
cloth.
2. Wet the outer edge of the rubber seal boot with a
soapy solution.
3. Insert rubber seal boot and ceramic seal (polished side
exposed) into seal plate. Make a cardboard washer to
cover the ceramic seal surface to be used while pressing
seal into position. Cardboard washer is used to avoid
scratching ceramic surface. Discard cardboard washer
after ceramic seal installation.
4. Reposition seal plate onto motor and slide rotating seal
assembly onto motor shaft with carbon sealing face first
until rubber end ring slides over shaft shoulder.
5. Screw impeller clockwise onto motor shaft using
screwdriver in shaft end slot to hold the shaft.
6. Reattach diffuser to seal plate and carefully reposition
the pumping assembly to the pump case. Attach with
the four cap screws through motor bracket to case.
7. Connect the pressure tubing by pressing on to barb
fitting on pump case until tubing shoulders against stop
edge of fitting. If tubing was cut off, carefully remove
excess tubing from barb fitting with a knife, taking care
not to scratch the fitting.
MOTOR REMOVAL:
1. Follow Steps 1 - 10 of “Seal Removal” in this section.
MOTOR REPLACEMENT:
1. Follow Steps 1 - 7 of “New Seal Installation” in
this section.