Pump Reassembly/Seal Replacement; Shaft Seal Replacement - Pentair IntelliFlo WhisperFlo VF Guide D’iNstallation

55
Pump Disassembly
9. To unscrew the impeller from
the shaft, twist the impeller
counterclockwise.
10. Remove the rotating portion of
the mechanical seal from the
impeller.
11. Remove the four bolts from the
seal plate to the motor, using a
9/16 inch wrench.
12. Place the seal plate face down
on a flat surface and tap out the
carbon spring seat.
13. Clean the seal plate, seal
housing, and the motor shaft.

Pump Reassembly/Seal Replacement

1. When installing the replacement shaft seal, use silicone sealant on the metal portion before pressing into
the seal plate as shown above.
2. Before installing the rotating portion of the seal into the impeller, be sure the impeller is clean. Use a light
density soap and water to lubricate the inside of the seal. Press the seal into the impeller with your thumbs
and wipe off the ceramic and carbon faces with a clean cloth.
3. Remount the seal plate to the motor.
4. Grease the motor shaft thread and screw impeller onto the motor shaft.
5. Screw in the impeller lock screw (counterclockwise to tighten).
6. Remount the diffuser onto the seal plate. Make sure the plastic pins and holding screw inserts are aligned.
7. Grease the diffuser O-ring and seal plate gasket prior to reassembly.
8. Grease the bolt threads, assemble the motor sub-assembly to the strainer pot-pump body by using the two
(2) through bolts for proper alignment. Do not tighten the through bolts until all six (6) bolts are in place
and finger tightened.
9. Fill the pump with water.
10. Reinstall the pump lid and plastic clamp then reprime the system, see page 43.

Shaft Seal Replacement

The Shaft Seal consists primarily of two parts, a rotating member and a ceramic seal. The pump requires
little or no service other than reasonable care, however, a Shaft Seal may occasionally become damaged
and must be replaced.
Note: The polished and lapped faces of the seal could be damaged if not handled with care.
IntelliFlo VF Installation and User's Guide
(Continued)
SEAL PLATE
G ASKET
IMPELLER
LOC KSCREW
SEAL
LOC KSCREW
M O TO R SHAFT
SEAL
M O TO R BO LT