Rotary Valve Service - Kenmore 625.388400 Owner's Manual

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B. ROTARY VALVE SERVICE
Before working
on the valve, turn
off the water
sup-
ply and disconnect
from
electrical
power.
TO RE-
LIEVE
PRESSURE:
Install
bearing
onto
gear shaft.
Install
motor
plate
and tighten
screws
to a snug fit. See page 6- 3 for de-
tailed
schematic.
• 3 VALVE BYPASS:
Close
the inlet valve
and open
a soft water
faucet.
Then
close the outlet
valve
and
open
the bypass
valve.
• SEARS SPECIAL
BYPASS:
Slide
the bypass
valve
stem
to bypass
position.
Loosen
three
hex
head
screws
toward
the back
side
of the valve
to allow
pressure
water
to bleed
out. Catch
water
with a rag.
DISASSEMBLY
To remove
a part or group
of parts,
refer to the valve
drawing.
A common
screwdriver
or nut
driver,
Phillips
screwdriver
and
pliers
are the only
tools
needed
to completely
disassemble.
SERVICING
THE VALVE
Inspect
all o-rings,
seals and gaskets
for wear
or de-
fects.
Inspect
the bottom
surface
of the rotor
for scratches,
chips
or wear.
Note:
If replacement
is needed,
be sure to use the current
replacement
part.
See page 6-3 for repair
parts.
ASSEMBLY
Be sure all parts
are in place and in the proper
posi-
tion. Lubricate
ALL o-rings
and seals with FDA ap-
proved
silicone
grease.
To install
the rotor
seal, first
place
the seal into the valve
groove,
rounded
side
down
(see cross-section).
Apply
a light
coating
of
silicone
grease
to the seal's
crossing
ribs. Then, care-
fully
center
the wear
strip
on the seal, and push
it
downward
onto the seal.
Install
the nozzle
and venturi
seal and drain
seal.
Assemble
wave
washer
bearing,
the wave
washer,
and two o-rings
onto the rotor top shaft. Then center
the rotor
in the valve
body,
on the rotor
seal.
Lower
the cover onto the valve
body and rotor shaft.
Then
install
the cover holding
screws.
Before
tight-
ening
the screws,
install
the valve
cam
and gear.
Then,
turn the rotor (clockwise
only) to service
posi-
tion.
Tighten
the
valve
assembly
screws
using
a
criss-cross
pattern.
If a torque
wrench
is available,
torque
to 30-40 inch pounds.
Do not over tighten.
Lubricate
the gear on the motor,
and the valve
cam
gear
with
Molykote
grease,
or other
high
quality
gear lubricant.
Be sure to orient
switch
as shown,
with lever toward
the cam.
motor mounting
T
_J
screws
mcOr teOr p l ate
/_
motor
motor plate<
,_
plastic bearing
cam & ear _"_=_
_ed
g
_
view
switch
_
,_
NN
o-ring seals _
_._
wave washer _
_
valve assembly
bearing, wave washer -----_
screws
wear-strip
,
_
rotor
rotor seal
__
drain seal
venturi seal
sensor
housing
turbine suppo_
See
turbine
assembly
se_ice,
page 3-2
5-5

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