3
Capacitor voltage may be hazardous
. To
discharge capacitor, hold insulated handle screwdriver
by
the handle
and short capacitor terminals together. Do not
touch metal screwdriver blade or capacitor terminals.
3. With one 7/16” wrench in place on motor shaft, place
second wrench on shaft hex at pump end and unscrew
impeller stack by turning counter-clockwise.
4. Once loose from motor shaft, hold shaft by snap ring
using a pliers or similar tool, and pull stack from shell.
You may have to apply a back and forth motion to break
stack loose from shell.
To assemble with replacement impeller stack, keep pump in
the vertical position, motor down, and reverse instructions 1
through 4.
Assembly hints:
A. Apply a soapy water solution to suction and dischage
O-Rings to ease seating of shell.
B. Make sure mechanical shaft seal spring is in proper
position on motor shaft.
C. On three-phase models, apply Loctite No. 271 to
motor shaft threads before reinstalling stack.
Mechanical Seal Changeout
(refer to Figures 1 and 2)
This procedure is best completed with the pump held in a
vertical position, motor down.
First complete
“Disassembly”
instructions 1 through 5 under
“Impeller Stack Changeout.”
(see Figure 1, Page 2).
5. Remove 4 capscrews holding pump body to motor.
6. Unscrew pump shell from pump body, turning clockwise
(left hand threads).
7. Remove mechanical shaft seal spring and rotating half
from motor shaft. Use care not to scratch motor shaft
when removing rotating half.
8. Remove pump body from motor and place on flat surface,
face down. Again, use care not to scratch motor shaft.
9. Use a screwdriver to push ceramic seat out from seal
cavity as shown.
10. Installation of ceramic seat:
A. Turn pump body over so seal cavity is up; clean
cavity thoroughly.
B. Clean polished surface of ceramic seat with a clean
cloth.
Ceramic Seat
3/4" pipe or
3/4" socket
with extender
Polished
Face
Rotating
Half
Cardboard
washer (supplied
w/seal)
Rotating Half
of Mechanical
Seal
Remove shell;
turn clockwise.
Push ceramic
seat out of
pump body
Remove
Pump Body
5
6
7
8
9
10
11
1212 0894 GS
Figure 2 – Mechanical seal changeout.
