Pentair WhisperFlo Pump - Manual (Page 5)

Rev. D 6-5-01 5 P/N 071109
SECTION III. SERVICE.
A. Pump Disassembly.
1. All moving parts are located in the rear sub-assembly of this pump.
Tools required:
a. 3/32 inch Allen head wrench.
b. ½ inch open end wrench.
c. 9/16 inch open end wrench.
d. Flat blade screwdriver.
2. To remove and repair the motor sub-assembly perform the following procedures.
a. Turn off the pump circuit breaker at the main panel.
b. Drain the pump by removing the drain plugs.
c. Remove the 6 bolts that hold the main pump body (strainer pot/volute) to the rear sub-assembly.
d. GENTLY pull the two pump halves apart, removing the rear sub-assembly.
e. Use a 3/32 inch Allen head wrench to loosen the two holding screws located on the diffuser.
CAUTION
Be sure not to scratch or mar the polished shaft seal faces; seal will leak if faces are damaged.
f. Hold the impeller securely in place and remove the impeller lock screw by using a flat blade
screwdriver. The screw is a left-handed thread and loosens in a clockwise direction.
g. Remove the shaft cap located at the back of the motor and hold the shaft secure with a ½ inch
(Century) or 7/16 inch (Franklin) open-end wrench. On A. 0. Smith motors, remove the motor
canopy, move the capacitor to one side and hold the shaft with a 7/16 inch open-end wrench.
h. To unscrew the impeller from the shaft, twist the impeller counterclock- wise.
i. Remove the four bolts from the seal plate to the motor, using a 9/16 inch wrench.
j. Place the seal plate face down on a flat surface and tap out the carbon/spring seat.
k. Clean the seal plate, seal housing, and the motor shaft.
WARNING
Risk of electrical shock or electrocution.
This pool pump must be installed by a licensed or certified electrician or a qualified pool serviceman in
accordance with the National Electrical Code and all applicable local codes and ordinances. Improper
installation will create an electrical hazard which could result in death or serious injury to pool users,
installers, or others due to electrical shock, and may also cause damage to property.
Always disconnect power to the pool pump at the circuit breaker before servicing the pump. Failure to do
so could result in death or serious injury to serviceman, pool users or others due to electric shock.
Read all servicing instructions before working on the pump.