Mechanical Seal Replacement - Flotec FP5712 Manual Del Usuario

Maintenance

Mechanical Seal Replacement

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 Replacement. See Figure 8.
6. Remove four capscrews holding pump body
to motor. Pump handle will come off with top
capscrews.
7. Unscrew pump shell from pump body, turning
clockwise (left hand threads).
8. Remove mechanical shaft seal spring and rotating
half from motor shaft. Use care not to scratch motor
shaft when removing rotating half.
9. Remove pump body from motor and place on flat
surface, face down. Again, use care not to scratch
motor shaft.
10. Use a screwdriver to push ceramic seat out from seal
cavity as shown.
11. 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
8
Rotating Half
of Mechanical
Seal
Figure 9 – Mechanical seal replacement.
For parts or assistance, call Flotec Customer Service at
D. Be sure polished surface of seat is free of dirt and
12. Installation of rotating half and spring:
A. Reinstall pump body on motor using extreme caution
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
E. Place spring over motor shaft so it rests on rotating half.
13. To complete reassembly from this point, reverse
NOTICE Lubricate suction and discharge O-rings with
soapy water for easier installation of shell.
7
Remove shell;
turn clockwise.
10
Push ceramic
seat out of
pump body
9
Remove
Pump Body
11
3/4" pipe or
3/4" socket
with extender
6
Ceramic Seat
a piece of 3/4" standard pipe.
has not been damaged by insertion. Remove excess
soapy water. Dispose of cardboard washer.
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.
water and slide onto motor shaft (sealing face first).
instructions 1 through 5 under Impeller Stack
Replacement.
Rotating
Half
12
Cardboard
washer (supplied
w/seal)
Polished
Face
Torque bolts to
15-27 ft-lbs
during
reassembly.
800-365-6832
9
1212 0605