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NOTE
The impeller is a right-handed thread, therefore
turn the impeller counter-clockwise to unscrew.
4. Inspect the impeller for signs of rubbing and/or
damage and replace if necessary.
5. If you are replacing the mechanical seal do steps 6
through 10, if not, skip to step 11.
CAUTION
Do not damage the ceramic or carbon surfaces
of the seals. If surfaces are damaged, leaks will
occur.
6. Remove the carbon face seal half from the
impeller. Refer to Figure 2 and 3. This is a spring-
loaded seal. Grasp the portion of the seal closest
to the impeller body and pull the seal off using a
twisting motion.
NOTE
This is a two (2) part replacement process.
The
mechanical seal must be replaced as a set.
7. Remove the four (4) 9/16” screws that secure the
backplate to the motor and remove the motor.
8. Place the backplate o-ring side down and force the
ceramic seal out using a screwdriver or drift pin.
2. Turn off any valves to prevent pool water from
reaching the pump. Drain the water from the pump
by removing the drain plug.
3. Using a 1/2” wrench, loosen the six (6) bolts
connecting the pump volute to the motor
backplate. Remove the bolts and washers and
either set aside to use in reassembly or use new
ones from the kit. See Figure 1.
Volute
Bolts
(Qty. 6)
Motor
Body
Back
Plate
Hex-Head
Motor Cover
Figure 1. Remove the Volute
4. Pull the volute from the backplate.
NOTE
At this point you have access to the inlet and
outlet of the impeller to remove any debris.
5. Remove the backplate o-ring and replace it with
the new o-ring making sure it is seated properly.
6. Install the new volute using six (6) bolts with six
(6) washers and six (6) nuts. Torque the bolts to
7±0.3 ft-lbs
7. If required, install the new drain plug. Torque to 8
to 10 in-lbs.
8. Turn on the filter pump and turn on the circuit
breaker to booster pump motor.
9. Once all the air has left the filter, close the
air release valve. (Follow the manufacturer’s
instructions for your filter.)
10. Turn on the booster pump and check the system
for proper normal operation.
2. Replace the Impeller and Mechanical
Ceramic/Spring Seal
1. To access the impeller and mechanical seal, follow
steps 1 though 4 of Section 1.
2. Remove the motor shaft cover on the back of the
motor by twisting the hex-head motor cover with
an adjustable wrench. See Figure 1. The motor
shaft will be exposed.
3. The impeller is connected to the motor shaft.
Hold the motor shaft with a ½” wrench while
unscrewing the impeller from the motor shaft with
your hand.
Carbon Seal Surface
• Ceramic Face Seal
• Backplate Seal
• Carbon Face/ Spring
Side of Seal
• Impeller Side of the
Mechanical Seal
Figure 2. Replace the Mechanical Seal
Impeller
Back Plate
Mechanical Seal
Prongs
Figure 3. Backplate, Impeller and Mechanical Seal
Location
