Five Star JHP - Manual (Page 16)

Page 16
2. Replace the motor shaft cover by inserting the
cover tabs into the slots and rotating the cover
90º clockwise.
3. Replace the diffuser over impeller using care to
insert alignment pins into the correct holes. The
molded-in arrow must point toward the handle
of the backplate.
4. Replace the two small Phillips head screws.
Tighten the screws to draw the diffuser against
the motor backplate.
5. Make sure the o-ring, o-ring groove, and o-ring
seal area are clean and free of debris, which
could cause a leak. If grease is used to retain
the o-ring, it must be silicone based. Do not use
petroleum-based grease, which will destroy the
o-ring.
6. Slide the diffuser into the mating hole in the
pump body. While supporting the motor, start
two screws on opposite sides. (This will hold
the motor in position while you start the other
six (6) screws).
7. Tighten the screws lightly in a crossing “X”
pattern using a 9/16" wrench starting with the
inner (middle) four (4) then 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 18 foot-
pounds.
8. If the pump is located above water level of the
pool, remove the lid and fill the basket with
water before starting the pump.
NOTE Prior to replacing the lid, check for debris around
the lid o-ring seat, as this will cause air leaks into
the system.
9. Hand-tighten the lid to make an air tight seal.
Do not use any tools to tighten the lid.
10. Open the pressure release valve on the filter, and
make sure it is clean and ready for operation.
11. Switch on the circuit breaker to the pump
motor.
12. Turn on the pump and check the system for
normal operation.
13. Once all the air has left the filter, close the
pressure release valve.
6.2.4 Mechanical Seal Replacement
NOTE This is a two part replacement process. The
mechanical seal must be replaced as a set.
NOTE Refer to Figure 6 for an illustration of the location
of the mechanical seal and impeller.
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, follow steps 1
through 8 of Section 6.2.2, Impeller Removal.
2. Remove the carbon face seal half from the
impeller (see Figure 8). 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.
Figure 7. Backplate, Impeller, Diffuser, and
Mechanical Seal Exploded View
Backplate
Mechanical Seal
Impeller
Diffuser Self Sealing Left
Handed Screw
Screws and
Washers (2)
Diffuser O-ring
• Ceramic Face Seal
• Backplate Seal
Figure 8. Replace the Mechanical Seal
• Carbon Face/ Spring
side of seal
• Impeller side of the
mechanical seal