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SECTION 5 SERVICE TECH. INFORMATION
I I
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 (:)pen a
soft water faucet. Then close the outlet valve and
(:)pen 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 (:)-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 tOuse the
current replacement part.
ASSEMBLY
Be sure all parts are in place and in the proper
position. Lubricate ALL ()-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 ()-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.
valve cam
///and gear
SEE NOZZLE
ASSEMBLY SERVICE, _ flow plug (backwash
PAGE 16
_'B,jl and fast rinse flow
"-_. (_ rate control)
v
,
screen _ _jf--rotor & disc
support-"'--'-=_ flow plug j_
nvo_@zNi_:;__p _ o-r,ng
and
venturi
seal
Lubricate the gear on the motor, and the valve cam
gear with Molykote grease, or other high quality gear
lubricant.
Be sure toorient switch as shown, with lever toward
the cam.
24