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IMPELLER STACK CHANGE OUT, CONTINUED
To reassemble with replacement impeller stack, keep pump in
the vertical position, motor down, and follow Steps 7 below.
6.
Use these reassembly hints as needed:
Apply a soapy water solution to suction and discharge
O-Rings to ease seating of shell.
Make sure mechanical shaft seal spring is in proper position
on motor shaft.
On three-phase models, apply Loctite
shaft threads before reinstalling stack.
Using pliers, remove and discard press on snap ring from
7.
replacement stack .
Remove top diffuser to allow access to the hex shaft . On some
8.
models the thrust washer and impeller may need to be removed as
well to expose enough of the shaft hex to place a wrench onto .
Assemble replacement stack onto motor shaft by performing
9.
Step 5 above and turning the shaft clockwise .
Once the shaft is seated reinstall diffuser back onto the end of
10.
the pump stack . The press on snap ring does NOT need to be
reinstalled .
Complete stack change out by reversing from step 4 above
11.
10
MECHANICAL SEAL CHANGE OUT
Refer to Figures 8 and 9. This procedure is best completed with
the pump held in a vertical position, motor down.
1.
2.
3.
No. 271 to motor
®
4.
5.
6.
7.
8.
9.
First complete the previous pump disassembly instructions
under Impeller Stack Change Out.
Remove 4 capscrews holding pump body to motor. Pump
handle will come off with top capscrews.
Unscrew pump shell from pump body, turning clockwise
(left hand threads).
Remove mechanical shaft seal spring and rotating half from
motor shaft. Use care not to scratch motor shaft when
removing rotating half.
Remove pump body from motor and place on flat surface,
face down. Again, use care not to scratch motor shaft.
Use a screwdriver to push ceramic seat out from seal cavity
as shown.
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.
C.
Lubricate outside rubber surface of seat with
soapy water. Place cardboard washer over polished
face of seat and press into seal cavity using a 3/4"
socket or a piece of 3/4" standard pipe.
D.
Be sure polished surface of seat is free of dirt and has
not been damaged by insertion. Re-move excess soapy
water. Dispose of cardboard washer.
Installation of rotating half and spring:
A.
Reinstall pump body on motor using extreme caution
not to hit ceramic portion of seal on motor shaft.
Reattach pump body to motor using capscrews. Be
sure to reinstall pump handle at this time.
B.
Inspect shaft to make sure that it is clean.
C.
Clean face of rotating half of seal with a clean cloth.
D.
Lubricate inside diameter of rotating half with soapy
water and slide onto motor shaft (sealing face first).
E.
Place spring over motor shaft so it rests on rotating
half.
To complete reassembly from this point, reverse
instructions under Impeller Stack Change Out. Lubricate
suction and discharge O-Rings with soapy water for easier
installation of shell.
P15005 (02-15-23)
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