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SERVICE TECH INFORMATION
5B. ROTARY VALVE SERVICE
Before working on the valve, turn off the water
supply and disconnect from electrical power. TO
- -3 VALVE BYPASS: Close theinlet 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.
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
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.
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,
carefullycenter 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 2o-rings onto the rotor top shaft. Then centerthe
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
position. Tighten the screws using a criss-cross
pattern. If a torque wrench is available, torque to
30-40 inch pounds.
flow plug assembly
nozzle & venturi seal
cam & gear
bearing, wave washer
Lubricate the gear on the motor, and the valve cam
gearwith Molykote grease, or other high qualitygear
Be sure to orient switch as shown, with lever toward