PUMP DISASSEMBLY/ASSEMBLY
Hazardous voltage.
Can shock, burn, or kill.
Disconnect
all power to pump before beginning this
operation.
1. Pull disconnect switch. Disconnect
power lines from pressure switch.
2. Open faucets or lines and release
all pressure in the system before
proceeding.
3. Remove the two cap screws holding
the pump to the flange adapter.
Don’t disturb the piping in the well.
4. Remove the flange adapter gasket
and scrape the surfaces clean.
5. Leaving the tubing in place,
unscrew and remove the straight
barbed fitting at the pressure switch.
6. Draw a line down the side of the
pump with a marker to help align-
ment during reassembly. Mark the
pump from the motor to the base
volute (see Figure 1).
7. Turn the pump upside down on the
bench and block it. Remove the four
cap screws from the base. With a
mallet, tap upward on the base to
loosen it. Lift the base off of the
intermediate volute (see Figure 2).
8. To reduce the chance of dropping
the pump onto your foot, lay it down
on the bench; block it so it won’t roll.
9. Hold the motor shaft with pliers or
vice grips through the opening in
the pump adapter. Unscrew the
impeller nut off the end of the shaft
(see Figure 3).
10. The impellers are keyed to the shaft
and do not unscrew. Insert two screw
drivers on opposite sides under the
exposed impeller and pry the impeller
off (Figure 4) to remove it.
11. CAREFULLY tap a small screw-
driver or thin bladed chisel in
between the intermediate volute
and the pump adapter in two or
three places around the pump to
separate the castings (Figure 5). Do
not mar the sealing surfaces; do not
break pieces out of the adapter or
volute – the castings are easily
damaged.
12. Remove the intermediate volute and
slide the impeller spacer off of the
shaft.
13. Remove the impeller. Don’t disturb
the shaft keys if you are only replac-
ing the seal.
14. Rotate the seal spring retainer cup
so that the slot lines up with the
shaft keys; remove the cup and
spring.
15. Remove the two cap screws holding
the adapter bracket to the motor.
16. With two screwdrivers on opposite
sides of the pump, carefully pry the
pump adapter away from the motor.
This will pull the seal off of the
motor shaft. Use caution to make
sure that the ceramic seal does not
dig into the shaft and scratch the
shaft’s sealing surface.
INSTALLATION OF NEW SEAL
1. Clean all gasket surfaces thorough-
ly before reassembly. Clean the
seal bore cavity in the pump
adapter.
2. Wet the rubber seat ring with soapy
water and push the stationary part
of the seal into the seal bore cavity.
Use a piece of 1" pipe pressing on a
cardboard washer (to prevent dam-
aging seal surface) as a press.
Make sure that the seal half is fully
seated in the seal bore cavity.
Remove the cardboard once the
seal is in place.
(
continued)
P2O-27 (8/27/07)
For further operating, installation, or maintenance assistance:
1-877-PUMP-P2O
(1-877-786-7726)
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Vertical Multistage Pump
Overhaul Kit
FPP1650 and FPP1657
Phone: 1-877-PUMP-P2O (877-786-7726)
Web Site: http://parts2o.com
