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SECTION 5
5E.
SERVICER'S TECH. INFORMATION
I
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 filtered 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(_)in drawing) toward the backside
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, Phil-
lips 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 sears crossing ribs. Then,
carefully center the wear strip on the seal, and push
it downward onto the seal.
L. _alve cam
I anndgear
retainer
washer
plate
\
flow plug (backwash
and fast rinse flow
rate control)
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, INSTALLTHE 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 valve cam.
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