Page 10
Backplate
Pump Housing O-Ring
Ceramic
Mating Ring
Spring
Drive Band
c
a
b
d
4. Remove pump housing O-ring.
(R0723100), (R0734300)
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.
(R0723200), (R0734300), (R0747800)
b
Using fingers pull the spring drive band free from the motor shaft.
• 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.
d
Using fingers or a blunt tool push the ceramic mating ring out of the backplate.
6. Replace the motor assembly.
(R0734200)
• 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
(R0723200), (R0734300), (R0747800)
• 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.
Polaris
®
PB4SQ™ Booster Pump