E-one Extreme Series, Service Manual

Page: 69 / 76

Mechanical Seal Assembly 11–1
Chapter 11 — Mechanical Seal Assembly
The mechanical seal is a carbon/ceramic type with spring bellows. The seal kit (PT# 1208)
consists of the ceramic portion, carbon portion/spring bellows, Pac–Ease, instruction sheet,
seven lock nuts and four main sealing O-rings. The seal is easily installed with the motor
turned upside down or lying on its side with the pump end facing the installer.
Replace the mechanical seal only during a motor overhaul. Do not replace the mechanical
seal in the field or as routine maintenance. Be sure to install the new motor head and control
compartment O-rings when reassembling.
Installing the Mechanical Seal
1. Ensure the pump cavity, seal bore and armature shaft are clean and grit-free. Wash
the seal installation tool (PT# 4028) and hands before proceeding. Proceed quickly
to prevent the lubrication from drying out; otherwise, a failure may occur.
2. Carefully remove the ceramic portion of the seal from the package. Lubricate the
O-ring with Pac-Ease or clean, soapy water, handling the seal by the edges. Do not
contaminate the smooth face of the seal.
3. Slide the seal over the armature shaft with the grooved side facing the motor head.
Use the seal installation tool to press the ceramic portion of the seal into the seal
bore. Do not twist or turn the tool; doing so may cut the O-ring.
4. Lubricate the bellows on the carbon portion/spring bellows portion with Pac-Ease or
clean, soapy water. Slide over the armature shaft (carbon face first) and press on
with the seal installation tool. Use a steady push and take care not to “slam” the two
faces of the seal together.
5. Install the pump rotor immediately. Use channel lock pliers to install the groove pin.
6. Rotate the motor shaft to help seat the seal.
7. Proceed to Chapter 12 — Final Test Procedures .
GROOVED FACE
SMOO TH
CARBON SECTION
SPRING BELLOWS
METAL WASHER
PAC-EASE
FACE
Figure 11-1