SERVICE TECH INFORMATION
SECTION 5
25
5B. ROTARY VALVE SERVICE
Before working on the valve, turn off the water
supply and disconnect from electrical power. TO
RELIEVE PRESSURE:
--3VALVEBYPASS:Closetheinlet valveandopena
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 3 hex head screws
toward the back side of the valve to allow pressure
water to bleed out. Catch water with a rag.
DISASSEMBLY
To removea partor group of parts,refer to thevalve
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
defects.
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.
ASSEMBLY
Be sure all parts are in place and in the proper
position. Lubricate ALL o-rings and seals with FDA
approved 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,
carefullycenterthewearstripontheseal,andpushit
downward onto the seal.
Install the nozzle and venturi seal and drain seal.
Assemble wave washer bearing, the wave washer,
and2o-ringsontotherotortopshaft.Thencenterthe
rotor in the valve body, on the rotor seal.
Lowerthe coveronto thevalve bodyand rotorshaft.
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
position. Tighten the screws using a criss-cross
pattern. If a torque wrench is available, torque to
30-40 inch pounds.
seal
wear--strip
flow plug assembly
assembled
view
See
Nozzle
assembly
service,
page 17
turbine
turbine support
drain seal
nozzle & venturi seal
rotor seal
o--ring seal
rotor
switch
cam & gear
motor
motor plate
sensor
housing
bearing, wave washer
wave washer
o--ring seals
Lubricate the gear on the motor, and the valve cam
gearwithMolykotegrease,orotherhighqualitygear
lubricant.
Be sure to orient switch as shown, withlever toward
the cam.
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