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SERVICE TECH. INFORMATION
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5
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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 the 3 hex head
screws (see A in drawing) 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 and disc 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 2 o-rings and the wave washer onto the
rotor and disc. Then center the rotor and disc, 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.
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.