Pentair INTELLIFLO VS-3050 - Manual (Page 20)

20
Pump Disassembly (Continued)
8. To unscrew the impeller from
the shaft, twist the impeller
counterclockwise.
9. Remove the rotating portion of
the mechanical seal from the impeller.
10. Remove the four bolts from
the seal plate to the motor, using a
9/16 inch wrench.
11. Place the seal plate face down on
a flat surface and tap out
the carbon spring seat.
12. 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.
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 subassembly 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.
11. Prime the pump.
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.
LOCK SCREW
SEAL
LOCK SCREW
SEAL
O-RING
SET SCREW
MOTOR
BOLT (4x)
MOTOR
BOLT (2x)
GASKET
SEAL
PLATE
IMPELLER
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