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SECTION 5 SERVICE TECH INFORMATION
5B. ROTARY VALVE SERVICE
Before working on the valve, turn off the water
supply and disconnect from electrical power. TO
RELIEVE PRESSURE:
--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 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 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
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,
carefully 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
2 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
tightening 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.
assembled
view
flow plug assembly
o-ringseals-_.
wavewasher-..._(_
beanng,wavewasher---..-h._
wear-strip
seal-
rotor
o-nug seal
rotorseal
drainseal
, nozzle&ventunseal
sensor
housing
Sea
Nozzle
assembly
service,
page 17
turbine suppod
turbine
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.
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