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SECTnON 5 SERVICETEC..I.mRMAT,O.
I I
58. ROTARY VALVE SERVICE
Before working on tile valve, turn off the water
supply and disconnect from electrical power
TO RELIEVE PRESSURE:
-3 VALVEBYPASS: Close the inlet valve and open a
soft water faucet Then close the outlet valve and
open the bypass valve.
- SEARS SPECIAI. 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 a!l pat_usare in place and in the proper
position. Lubricate ALLo-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 sea!, and push it
downward onto the seal
Install the nozzle and venturi seal and drain seal.
Assemble 2 o-rings and d_e 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 rotQr 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, tf 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 the switch as shown, with the lever
toward the cam..
I
valve cam
& gear
flow plug (backwash
and fast rinse flow
(_ rate control)
rotor & disc
SEE NOZZLE
ASSEMBLY
SERVICE, 4,
SECTION 3
N L v_
E
o-ring
rotor seal
nozzle &
venluri seal
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