Sears 625.34842 Uživatelský manuál stáhnout pdf (Strana 23)

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 BYPA,_S.. Close the inlet valve and (;)pen a

soft water faucet. Then close the outlet valve and

(:)pen the bypass valve.

-,fEARS SPE(3AL 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.

to SERVICE position. Tighten the screws using a

criss-cross pattern. If 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.

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 tO use 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)

SEE NOZZLE

ASSEMBLY

SERVICE,

SECTION 3

switch {_ "-"-'>_'_._

_,_/_ alve cam

_._.._.... & gear

• _..._

flow plug (backwash

and fast rinse flow

rate control)

rotor & disc

wear strip

€

o-ring

rotor seal

drain seal

nozzle &

venturi seal

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 63 64

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