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 the 3 hex head screws (see A in drawing) toward the backside of the valve to allow pressure water to bleed out. Catch the 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 seals 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 POSI< TION. Tighten the screws using a criss<cross pattern. If a torque wrench is available, torque to 30<40 inch pounds.
switch
valve cam & gear
SEE NOZZLE
ASSEMBLY SERVICE,
SECTION 3
| flow plug (backwash | |
| and fast rinse flow | |
| rate control) | |
| rotor & disc | |
| o±ring | |
wear strip |
| |
seal | rotor seal | |
cross±section | ||
drain seal | ||
view | ||
| nozzle & | |
| venturi seal |
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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