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SECTION 5 SERVICE TECH. INFORMATION
5D. ROTARY VALVE SERVICE
Before working on tile valve, turn off the water
supply and disconnect from electrical power. TO
RELIEVE PRESSURE:
-- 3 VALVE BYPASS: Close file inlet valve and open a
soft walcr faucet. Then close tile outlet valve and open
the bypass valve.
-- SEARS SPECIAL BYPASS: Slide tile bypass valve
slcm to bypass position. Leo,veto lhe 3 hex head screws
(see A in drawing) toward the back side of fl_e valve to
allow pressure walcr 1o bleed out (catch water with a
rag).
DISASSEMBLY
To remove a pat_ or group of pat_s, refer to ll_e valve
drawing. A common screwdriver or nut driver, Phillips
screwdriver and pliers are the only lot)is needed to
complemly disassembe.
SERVICING THE VALVE
Inspect all o-rings, seals and gaskels for wear or
defects.
Inspect the bottom surf_ce of tile rotor and disc for
scratches, chips or wear.
NOTE: If replacement is needed, be sure to use tile
current replacement pat_.
ASSEMBLY
Be sure all parts are in place and in the proper
position. Lubricate ALL o-rings and seals wilh FDA
approved silicone grease. T() install tile rotor seal, first
place file seal into the valve groove, rounded side
down (see cross-seclion). Apply a light coaling of
silicone grease 1o the seal's crossing ribs. Then,
carefully center lhe 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
tolof and disc. Then center the totof and disc, in tile
valve body, on the totof seal.
Lower the cover onto tile valve body and rotor shaft.
Then install file cover holding screws. Before
tightening the screws, install the valve cam and
gear. Then, turn the rotor (clockwise only) to
service position. Tighten file screws using a
criss-cross pallern. If a tor(tue wrench is available,
tor(lue 1o 30-40 inch pounds.
switch
SEE NOZZLE
ASSEMBLY SERVICE,
V..... /1__-_ valve cam
flow plug (backwash
and fast rinse flow
rate control)
Lubricalc tile gear on the motor, and fl_e valve cam
gear with Molykote grease, or other high quality gear
lubricant.
Be sure to orient switch as shown, with lever toward
the cam.
27
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