INSTALLATION AND REMOVAL 4/5
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.
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. Note: Use extreme care when applying
sealant. Ensure that no sealant contacts the seal plate surface or the ceramic seal. Allow
sealant to cure overnight before reassembling.
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. Be sure the plastic pins and holding screw
inserts are aligned.
7. Grease the diffuser o-ring and seal plate gasket prior to reassembly.
8. Assemble the motor subassembly to the strainer pot-pump body.
9. Fill the pump with water.
10. Reinstall the pump lid and plastic clamp. See “Pump Strainer Basket Service” on page 32
for details
11. Reconnect the RS-485 communication cable to the pump.
12. Prime the pump, see page 24.
Motor
Bolt (4X)
Mechanical Seal
Seal Plate Gasket
Diffuser O-Ring
Motor
Seal Plate
Impeller
Impeller Lock Screw
Impeller Lock
Screw Gasket
Clamp
Lid
Motor Shaft
Drain Plugs
Foot
Insert
Foot
Diffuser
Screws (2X)
Seal Plate
to Housing Bolts (6X)
Diffuser
38
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