Mechanical Seal Replacement; Motor Replacement - Jandy FHPM FloPro Series Installation And Operation Manual

5. Replace the two (2) small Phillips-head screws.
Tighten the screws to draw the diffuser against the
motor backplate.
6. Make sure the diffuser o-ring, o-ring groove, and
o-ring seal area are clean and free of debris, which
could cause a leak. If you removed the diffuser
o-ring during disassembly, re-install it on the
diffuser, as shown in Figure 12. If grease is used
to retain the diffuser o-ring, it must be silicone
based. Do not use petroleum-based grease. It will
destroy the o-ring.
O-ring Mounting Location
Figure 12. Pump Body and Diffuser Exploded View
7. Slide the diffuser into the mating hole in the pump
body. While supporting the motor, start two (2)
screws on opposite sides. (This will hold the motor
in position while you start the other screws.) Start
the other four (4) screws.
8. Tighten all six (6) screws lightly in a crossing "X"
pattern using a 9/16" wrench. Start with the inner
(middle) two (2), then tighten the outer (top and
bottom) four (4) to draw the backplate to the body
in a even manner. Once all the screws are snug,
torque in the same order to 10 foot-pounds.
9. If the pump is located above the water level of the
pool, remove the lid and fill the basket with water
before starting the pump.
10. Prior to replacing the lid, remove any debris
around the lid o-ring seat, as debris will allow air
to leak into the system.
11. Place the lid with locking ring on the pump
housing. Align 'START' with the ports and turn
the lid's locking ring clockwise until 'LOCKED'
aligns with the ports. Hand-tighten the lid to make
an air tight seal. Do not use any tools to tighten
the lid.
FloPro Series Pumps Installation and Operation Manual
Pump Body
Diffuser
O-ring
Diffuser
12. Open the pressure release valve on the filter and
make sure it is clean and ready for operation.
13. Switch on the circuit breaker to the pump motor.
13. Turn on the pump and check the system for normal
operation.
14. Once all the air has left the filter, close the filter
pressure release valve.

6.2.4 Mechanical Seal Replacement

NOTE Refer to Figure 13 for an illustration of the
location of the mechanical seal and impeller.
Backplate O-ring
Mechanical Seal
Backplate
Impeller
Diffuser
Diffuser O-ring
Figure 13. Backplate, Impeller, Diffuser, and
Mechanical Seal Exploded View
NOTE This is a two-part replacement process. The
mechanical seal must be replaced as a set.
WARNING
Do not damage the ceramic or carbon surfaces of
the seals. If surfaces are damaged, leaks will occur.
1. To access the mechanical seal, comply with the
warning and follow steps 1 through 8 of Section
6.2.2, Impeller Removal.
2. Remove the carbon face seal half from the motor
shaft. (See Figure 11.) 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.
3. Remove the motor from the backplate following
steps 1 through 3 in Section 6.2.5, Motor
Replacement.
4. Place the backplate o-ring side down and force the
ceramic seal out using a screwdriver or drift.
Page 17
Self Sealing Left Hand Screw
Screws (2)