4
EXPLODED VIEW
DISASSEMBLY
Remove the four acorn nuts 3/8” (10 mm) (Key 1) and
fiber washers (Key 2) from the pump studs (Key 3 & 14).
Slide the macerator adapter (Key 4) off the studs. Insert
a thin bladed 9/32” (7mm) wrench behind the chop-
per plate (Key 6) and onto the flat of the motor shaft to
prevent it from turning. Unscrew (counter-clockwise) the
locknut 7/16” (11 mm) on the end of the motor shaft and
remove the stainless steel chopper blade. Remove the
pump wearplate (Key 7) and two paper gaskets (Key 8).
Now slide the pump body (Key 12) with impeller (Key 9),
small wearplate (Key 10), two studs and shaft seal as an
assembly off the motor shaft and remaining two mount-
ing studs. Remove the starlock retaining washer on the
seal and push the seal out of the seal bore.
If reconditioning pump with a service kit (Part No.
18598-2000), it is not necessary to remove the seal
because the new seal is pre-installed in the new body. It
is also generally not necessary to remove the slinger or
studs screwed into the motor end bell.
ASSEMBLY
If installing a new seal, push it into the seal bore of the
body (Key 11) with the lip (Key 12) pointing toward the
impeller bore. Press the starlock washer into the seal
bore with the concave side up to secure the seal in the
bore. Install the two shorter studs in the two holes with
threaded inserts in the new pump body and tighten
finger tight. If required, screw the two longer studs into
the tapped holes in the motor end bell. Slide the new
pump body with the shaft seal installed onto the motor
shaft and two long mounting studs in the motor. Slide
the small wearplate (Key 10) over the motor shaft and
position it in the bottom of the impeller (Key 9) bore.
Slide the new impeller onto the motor shaft and, with a
counter-clockwise motion, push it into the pump impel-
ler bore. Position one new gasket (Key 8) on the studs
and against the pump body assuring the cut-out aligns
with the inlet groove in the body. Position the large
wearplate (Key 7) and second gasket (Key 8) on the
studs and against the body again aligning the hole in
the wearplate and gasket cut-out with the pump inlet.
Position the chopper (Key 6) on the end of the motor
shaft with drive tab aligned with flat of shaft and point-
ing toward the motor. Hold the shaft with the wrench
and secure the chopper (Key 6) to the shaft with the
locknut. Position the macerator housing (Key 4) on the
four studs ensuring the cut-out in the inner wall aligns
with pump body inlet port and hole in the wearplate.
Position a new fiber washer (Key 2) on each of the studs
and secure the macerator housing in place with the four
acorn nuts (Key 1).
PARTS LIST
91085-0340
17288-0010
18599000A
91010250A
37056-1000
18597-1000
18596-1000
6303-0003-P
12316-1002
1040-0000
6342-0000
17288-0000
74001-1863A
91010253A
20030415A
21000378A
18598-2000
Acorn Nut Kit (4 per kit)
Fiber Washer
Stud Kit, 3.23” (2 per kit)
Pump Adapter
Rinse Valve
Chopper Plate w/Locknut
Wearplate, Large
Gasket Kit (2 per kit)*
Impeller*
Wearplate, Small*
Pump Body*
Seal*
Slinger
Stud Kit, 3.87” (2 per kit)
Motor Kit
Adapter O-ring Kit (2 per kit)
Rubber Boot
Wire Harness w/Clamps Kit
Control Assembly Kit
Service Kit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
4
4
2
1
1
1
1
2
1
1
1
1
1
2
1
1
1
1
1
1
Key
Qty/Pump
Description
Part
Number
*These parts are supplied in 18598-2000 service kit
1
2
16
4
5
7
9
6
8
3
10
11
15
12
13
14
17
