Servicing; Motor Care; Shaft Seal Replacement; Pump Disassembly - Pentair WHISPERFLO Series Installation And User Manual

4

SERVICING

Always disconnect power to the pump at the circuit breaker and disconnect the communication cable before servicing the pump.
Failure to do so could result in death or serious injury to service people, users or others due to electric shock. Read all servicing
instructions before working on the pump.
DO NOT open the strainer pot if pump fails to prime or if pump has been operating without water in the strainer pot. Pumps operated
in these circumstances may experience a build up of vapor pressure and may contain scalding hot water. Opening the pump may
cause serious personal injury. In order to avoid the possibility of personal injury, make sure the suction and discharge valves are open and strainer pot
temperature is cool to touch, then open with extreme caution.
Be sure not to scratch or mar the polished shaft seal faces; seal will leak if faces are damaged. The polished and lapped faces of
the seal could be damaged if not handled with care.

Motor Care

Protect from heat
1. Shade the motor from the sun.
2. Any enclosure must be well ventilated to prevent
overheating.
3. Provide ample cross ventilation.
Protect against dirt
1. Protect from any foreign matter.
2. Do not store (or spill) chemicals on or near the motor.
3. Avoid sweeping or stirring up dust near the motor
while it is operating.
4. If a motor has been damaged by dirt it voids the
motor warranty.
5. Clean the lid and clamp, O-ring, and sealing surface
of the pump pot.
Protect against moisture
1. Protect from splashing or sprayed water.
2. Protect from extreme weather.
3. If a motor has become wet - let it dry before operating.
Do not allow the pump to operate if it has been flooded.
4. If a motor has been damaged by water it voids the
motor warranty.
Note: When replacing the motor, be certain that the
motor support is correctly positioned to support the
size of motor being installed.

Shaft Seal Replacement

The Shaft Seal consists primarily of two parts, a rotating
member and a ceramic seal.
The pump requires little or no service other than
reasonable care, however, a Shaft Seal may occasionally
become damaged and must be replaced.
Note: The polished and lapped faces of the seal could
be damaged if not handled with care.
WHISPERFLO High Performance Pump Installation and User's Guide
®

Pump Disassembly

All moving parts are located in the rear sub-assembly
of this pump.
Tools required:
• 3/32 inch Allen head wrench
• 1/2 inch open end wrench
• 9/16 inch open end wrench
• Flat blade screwdriver
• #2 Phillips screwdriver
To remove and repair the motor subassembly, follow the
steps below:
1. Turn off the pump circuit breaker at the main panel.
2. Drain the pump by removing the drain plugs.
3. Remove the 6 bolts that hold the main pump body
(strainer pot/volute) to the rear sub-assembly.
4. GENTLY pull the two pump halves apart, removing
the rear sub-assembly.
5. Use a 3/32 inch Allen head wrench to loosen the
two holding screws located on the diffuser.
6. Hold the impeller securely in place and remove
the impeller lock screw by using a #2 Phillips
screwdriver. The screw is a left-handed thread and
loosens in a clockwise direction.
7. Remove the shaft cap located at the back of the
motor and hold the shaft secure with a ½ inch
open-end wrench.
8. To unscrew the impeller from the shaft, twist the
impeller counterclockwise.
9. Remove the four bolts from the seal plate to the
motor, using a 9/16 inch wrench.