Impeller, Seal, and Capacitor Replacement
– 900S Series
Risk of electrical shock. Disconnect
electrical power before doing any service work on pump!
Refer to assembly drawing, Page 7 – 900 Series.
Disassembly
1.
Remove hex head bolts holding motor housing to volute.
Remove motor housing; set it on its side in a clean area.
2.
Hold impeller; remove impeller screw and washer.
3.
Slide impeller off of shaft for cleaning. If necessary, tap
impeller to loosen it.
4.
Cradle motor assembly so that it stands vertically with
motor shaft extending out of the bottom.
Risk of electric shock. Before touching
capacitor, discharge it by shorting the terminals
together with an amber handled screwdriver.
5.
Unfasten hex head screws holding capacitor cover and
remove cover. Disconnect wires from power cord set
(wires and connector are color coded for reassembly).
Turn pump upside down to drain oil.
6.
If replacing capacitor (single phase only), remove wires
from capacitor. Remove capacitor.
7.
Slide a small screwdriver down beside the shaft and pry
the lip seal out. Discard lip seal after removal. Be careful
not to scratch the shaft.
8.
Remove retaining ring and washer from motor shaft and
slide rotating half of seal off of shaft.
9.
Remove motor cover from seal plate. Remove through
bolts from motor assembly. Remove motor and shaft
from seal plate.
10. Working from back of seal plate, tap primary seal head
out of seal plate; thoroughly clean seat cavity.
Re-assembly
NOTICE:
Make sure that seal faces are clean and undamaged.
1.
Apply Permatex #2 sparingly to outside of the primary
seal head. Press new primary seal head into cavity in seal
plate. See Figure 3.
2.
Set seal plate on cradle and reinstall motor.
NOTICE:
Do not overtighten through bolts!
3.
Inspect seal plate O-Ring carefully; replace if damaged.
Place O-Ring in groove on seal plate, mount motor on
seal plate with socket head screws.
NOTICE:
It is good practice to replace O-Ring each
time pump is serviced.
4.
Turn assembly upside down and slide new rotating mem-
ber of seal onto shaft. Apply soap to rubber ring to aid in
sliding seal on shaft.
NOTICE:
De-burr snap ring groove before installing
seal. Do not damage ceramic face or rubber ring when
passing seal over shaft shoulder and snap ring groove
shoulder. Seal faces and ring must be clean and
undamaged or seal may leak. See Figure 4.
5.
Reinstall washer and snap ring on shaft. See Figure 5.
6.
Install new lip seal (Figure 6). Lubricate lip seal with a
small amount of Aqualube or a lithium-based grease.
7.
Reassemble impeller, washer, and impeller screw.
8.
Reinstall capacitor (single phase only). See below, for
electrical connections to capacitor.
9.
Fill motor with clean dielectric oil (Part No. U197-8A). To
allow room for expansion, oil level with cold motor should
be about 1/4" (6-7mm) above top of motor assembly.
10. Inspect capacitor cover O-Ring; replace if damaged. If it
is not nicked or scratch, clean and reinstall.
NOTICE:
It is good practice to replace O-Ring each
time pump is serviced.
11. Reconnect motor lead wires to connector. Reference
color code markings. Reinstall capacitor cover.
6
Capacitor Connections (Single Phase Only)
Leads From
Stator
White
Red
Black
Green
Black
Capacitor
1308 1094
G
G
Impeller side of seal plate.
Permatex
here.
Install washer,
then clip.
Slide seal
onto shaft.
Slide ceramic
part onto shaft.
Don't damage
rubber ring
on groove.
Press seal
into cavity.
2799 0497
Figure
4
Figure
3
Figure 5
Figure 6
Stator Leads: 12 Wire
Stator Leads: 9 Wire
3 Phase Wiring Connections
208-230V
L1
Red
L2
Black
L3
White
1
2
7
6
4
8
3
5
9
12
10
11
460V
L1
Red
L2
Black
L3
White
1
2
7
6
4
8
3
5
9
12
10
11
380V
L1
Red
L2
Black
L3
White
1
2
3
7
8
9
6
4
5
12
10
11
460V
L1
Red
L2
Black
L3
White
1
2
7
6
4
8
3
5
9
208-230V
L1
Red
L2
Black
L3
White
1
7
4
3
8
5
2
6
9
