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SERVICE TECH. INFORMATION
SECTION 5
27
5D. 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 tobypass position. Loosen the 3hex headscrews
(see A in drawing) toward the back side of the valve
toallowpressurewatertobleedout(catchwaterwith
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 disassembe.
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,
carefullycenter the wearstrip 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 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.
screen
Lubricate the gear on the motor, and the valve cam
gearwithMolykotegrease,orotherhighqualitygear
lubricant.
Be sure to orient switch as shown, with lever toward
the cam.