4
DISASSEMBLE
Upper Housing
1. Loosen but do not remove four pump head screws and
carefully remove upper housing assembly (1)
2. Inspect check valve (2) for debris
3. Reassemble new upper housing (1)
Check Valve Assembly
Follow step 1
4. Replace check valve (2)
5. Reassemble upper housing (1)
Lower Housing, Diaphragm, Motor
Follow step 1, then slide rubber foot from mounting track.
6. Rotate lower housing (4) so mounting notch opening
on lower housing exposes set screw which holds
bearing housing to shaft.
7. Loosen this set screw by inserting 1/8” Allen wrench
into mounting notch opening. Then, slide lower
housing (4) off motor shaft.
Diaphragm Cont’d
8. Loosen four cam piston screws with Phillips head
screw driver and pull apart cam from inner pistons.
(Pistons should always be replaced when a new
diaphragm is installed.)
Motor Cont’d
9. Replace Motors
REASSEMBLE
Motor
1. Reassemble lower housing assembly (4) to motor.
(Follow steps 4 to 10.)
Diaphragm
2. Lower housing is assembled with:
• Flat side of diaphragm and outer pistons facing
motor
• Hex stem of inner pistons must be aligned into hex
holes in outer pistons (4).
• Outer pistons must be aligned with alignment slots
on cam assembly making sure screw holes align in
cam assembly, otherwise diaphragm will leak.
3. Tighten cam piston screws partially, center piston in
diaphragm, then tighten screws securely (18 in. lbs.
torque)
Lower Housing
4. Reassemble lower housing assembly (4) to motor.
5. Re-tighten set screw securely. Set screw head
must be positioned facing motor covering seam
(indentation). (Positioning of this screw is critical
to avoid misalignment and subsequent diaphragm
damage.)
Upper Housing, Check Valve
6. Reassemble upper housing (1)
7. Properly seat O-Ring in check valve assembly (2) and
check if ferrules and screen are in place on upper
housing (1)
8. Install check valve (2) into upper housing (1) and push
in.
9. Assemble on to lower housing (4), align 4 screws on
to motor by rotating lower housing (4) if necessary to
align feet
10.
SHOWER DRAIN/R.O. FEEDER PUMP SERVICE PARTS
KEY
DESCRIPTION
MODEL
X4105143
X4105343
0
Service Kit*
20409043
20409043
1
Upper Housing with Clips
20404004
20404004
2
Check Valve Assembly
20407030
20407030
3
Diaphragm Assembly (includes screws)
20403040
20403040
4
Lower Housing Assembly
20419001
20419001
5
Motors
−
−
Motors CE Models
−
−
7
Pump Head Assembly
20406004
20406004
*Service Kit includes #2 and #3 side clips and drive cam assembly.
Tighten screws evenly to 30 in. lbs. torque.
