Impeller Replacement - Jandy FHPM FloPro Series Installation And Operation Manual

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6. If necessary, remove any debris in the inlet and
outlet of the impeller.
7. Remove the motor shaft cover on the back of the
motor by twisting the hex-head screw with a 90°
crescent wrench. (See Figure 7.) The motor shaft
will be exposed.
8. Hold the exposed motor shaft with a ½" wrench
and remove the impeller center screw using a No.
2 Phillips screwdriver. Turn the left-hand-threaded
screw clockwise to loosen it. See Figure 9.
Self Sealing Left Hand Screw
Figure 9. Remove the Impeller
9. Hold the motor shaft with a ½" wrench while
unscrewing the impeller from the motor shaft with
your hand. Turn the right-hand-threaded impeller
counter-clockwise to unscrew it.
10. Inspect the impeller and diffuser for signs of
rubbing and/or damage. See Figure 10.
Diffuser O-Ring
Screws (2)
Self Sealing Left Hand Screw
Diffuser
Impeller
Backplate O-ring
Backplate
Figure 10. Diffuser and Impeller Exploded View
FloPro Series Pumps Installation and Operation Manual
Backplate
Mechanical
Seal
Impeller
Mechanical Seal

6.2.3 Impeller Replacement

WARNING
To avoid the risk of property damage, severe personal
injury, or death, turn off the pump and switch off the
circuit breaker to the pump motor before beginning
this procedure.
1. Press the carbon face seal half (see
Figure 11) on the motor shaft using a twisting
motion. Make sure the carbon surface is facing
toward the ceramic ring in the backplate.
Carbon Seal Surface
• Ceramic Face Seal
• Backplate Seal
Figure 11. Mechanical Seal
CAUTION
VERY IMPORTANT! Grasp the lower portion of
the seal (opposite the carbon face) when installing
the seal or it will be damaged.
NOTE To assist assembly, only use water or a soap
solution as a lubricant. Any other lubricant will
destroy the seal after a short period of time.
NOTE Excercise great care to keep the seal and
mating parts clean.
2. While holding the motor shaft with a ½" wrench,
thread the impeller onto the motor shaft. Hand-
tighten the impeller until it is secure. Install
the impeller center screw into the center of the
impeller and tighten, using a No. 2 Phillips
screwdriver. Do not overtighten. Turn the left-
hand-threaded impeller screw counter-clockwise
to tighten it.
3. Replace the motor shaft cover by inserting the
cover tabs into the slots and rotating the cover 90º
clockwise.
4. Replace the diffuser over the impeller, using care
to insert alignment pins into the correct holes. The
alignment pins in the diffuser allow the diffuser to
be inserted only one (1) way.
• Carbon Face/ Spring
Side of Seal
• Impeller Side of the
Mechanical Seal