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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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