Polaris PB4SQ Replacement Instructions Manual page 10

Page 10
4. Remove pump housing O-ring.
a Remove and inspect the pump housing O-ring from the back plate.
• Damaged or worn O-Rings need to be replaced before returning the pump to
normal operation.
5. Remove the backplate and the mechanical seal.
Using fingers pull the spring drive band free from the motor shaft.
b
• Use extreme caution when removing the spring drive band. Do not touch the
graphite sealing surface with your hands.
• Place the spring drive band in a safe place with the sealing side facing up.
c Pull the backplate free from the motor body. The ceramic mating ring should be
seated in the backplate.
Using fingers or a blunt tool push the ceramic mating ring out of the backplate.
d
6. Replace the motor assembly.
• If replacing the motor assembly please be sure to follow all reassembly steps
9-11. If any parts do not appear to be in optimal condition it is advised that these
parts be replaced before returning the pump to normal operation.
• Ensure that the electrical power to the pump is disconnected at the breaker.
• Allow 5 minutes for the capacitor to discharge before servicing.
• Remove the capacitor housing cover. Follow step 1 a-c in section Section 4.
(R0722900)
• Connect the high voltage wiring as illustrated in the wiring diagram in section
Section 7 on page 8.
7. Install new mechanical seal
• DO NOT REUSE ORIGINAL MECHANICAL SEAL
• Using a lint free cloth, ensure that the ceramic mating ring is free of dust and debris.
• Seat ceramic mating ring firmly into backplate. Use clean water to assist
installation. DO NOT use any lubricants to install the ceramic mating ring.
• Slide the backplate and seal onto the motor shaft.
• Slide spring drive band into position behind the mechanical seal. Use clean water
to assist installation. DO NOT use any lubricants to install the drive band.
Pump Housing O-Ring
(R0723100), (R0734300)
(R0734200)
(R0723200), (R0734300), (R0747800)
Backplate
c
Polaris PB4SQ™ Booster Pump
®
(R0723200), (R0734300), (R0747800)
Ceramic
Mating Ring
a
Drive Band
b
d
Spring