Automatic Washer Study Course

8/9/2019 Automatic Washer Study Course

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All rights r eserved. No portion of th is book ma y be repr oduced in any form with out

written permission from WHIRLPOOL CORPORATION.

1989, 1994, 1998 WHIRLPOOL CORPORATION

WHIRLP OOL CORPORATION does not a ssu me an y responsibilityor a ny liability in conn ection with t he u se of th is ma nu al.

The trademar ks WHIRLPOOL , , , andFSP ar e registeredtr adem ar ks of Whirlpool Corpora tion.


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INTRODUCTION

The mat erial presented in th is module is inten ded to provide you with a n un dersta nding of the

fundam enta ls of automat ic wash er servicing.

Major a ppliances have become more sophisticated, tak ing th em out of the screwdriver an d pliers

category. Their electrical circuits include several different types of automatic controls, switches,

heaters, valves, etc.. Semiconductors, solid-state controls, and other components usually

associated with radio and television electronic circuits are being engineered into automatic

washers, dryers, dishwashers, and refrigerators.

The appliance technician is emerging into a professional status of his own. He must prepare

himself now to be able to perform his dut ies today as well as to reta in his pr ofessiona lism in th e

future.

No longer is on-the-job training sufficient to prepare technicians for the complicated procedures

required for t odays sophisticated applian ces. This tr aining can best be obtained th rough organized

classroom study and application. However, much of the knowledge necessary to service todays

appliances can be obtained through study courses. Completion of this and other courses will

provide you with su fficient un dersta nding of applian ces a nd t heir operat ion t o enable you to do

minor service. It will also serve as a va luable stepping stone to more advan ced stu dy and on-th e-

job tra ining t o impr ove your servicing skills.

Informa tion cont ained in th is module is used on WHIRLP OOL appliances.

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CHAP TER 1 ......................................................................................... 3WATER SYSTE M

*TEST ........................................................ Se e Te s t Book LIT787774

*N O T E: We recom m end t a k i n g t h e T ES T for MOD U LE 2, r i g h t

a fter s tud ying i t .

PAGE

TABLE of CONTENTS

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CHAPTER 1

WATER SYSTEM

(for B elt Drive Auto ma tic Wash ers)

WATER LEVEL

SWITCH

WATER INLET

HOT and COLD

INLET MIXING

VALVE

WATER PUMP

SELF-CLEAN

FILTER

AIR DOME

RINSE and BLEACH

DISPENSER

SIDE CHECK

VALVE

PUMP GUARD

(SOME PARTS MAY NOT BE USED ON ALL MODELS)

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WATER SYSTEM

(for D irect Drive Auto ma tic Wash ers)

WATER LEVEL

SWITCHRINSE and BLEACH

DISPENSER

HOT and COLD

INLET MIXING

VALVE

WATER INLET

AIR DOME

FILTER

WATER PUMP

(SOME PARTS MAY NOT BE USED ON ALL MODELS)

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WATER F LOW

(Belt Drive Models)

Water systems conta in valves, pumps, filters a nd h oses. Their function is t o fill the t ub with water, filter th e

water, send water t o storage tubs, only to recall the water later, then to drain t he wat er from th e aut omatic

washer.

SELF-CLEANING FILTER WATER FLOWRING F ILTER

(Non-Su ds Sav er Mode ls)

MANUAL CLEAN FILTER WATER FLOW


FILTERING PUMP-OUT

FILTERING P UMP -OUT

VIEWED FROM S IDE OF WASHER

MANUALFILTER

WATERFLOW

TODRAIN

MANIFOLDTRAP

PUMPTHREE-PORT

MANUALFILTER

WATERFLOW

TODRAIN

MANIFOLDTRAP

PUMPTHREE-PORT

AGITATORPUMPING

VANES

WATERFLOW

TO DRAINRING FILTER

RING FILTER TO DRAIN

WATERFLOW

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SELF-CLEANING FILTER WATER FLOW

TUB MOUN TED F ILTER






TUB MOUNTEDFILTER

TODRAIN

MANIFOLDTRAP

PUMPTWO-PORT

TUB MOUNTEDFILTER

TODRAIN

MANIFOLDTRAP

PUMPTWO-PORT

TODRAIN

SIDECHECK VALVE

WATERFLOW

MANIFOLDTRAP

PUMPTWO-PORT

SIDECHECK VALVE

WATERFLOW

MANIFOLDTRAP

PUMPTWO-PORT

FILTERFILTER

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TUB MOUN TED F ILTER

(Suds Sav er Mode ls)

FILTERING TO SUDS WATER STORAGE TUBS

PUMP-OUTFROM SUD S WATER STORAGE TUBS

TUB MOUNTEDFILTER TO

DRAIN

MANIFOLDTRAP

PUMPTWO-PORT

TWO-WAYVALVE

FROM SUDSSTORAGE


DRAIN

MANIFOLDTRAP

PUMPTWO-PORT

TWO-WAYVALVE

TO SUDSSTORAGE


DRAIN

MANIFOLDTRAP

PUMPTWO-PORT

TWO-WAYVALVE

TO SUDSSTORAGE


DRAIN

MANIFOLDTRAP

PUMPTWO-PORT

TWO-WAYVALVE

TO SUDSSTORAGE

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MANUAL CLEAN FILTER WATER FLOW


FILTERING

PUMP-OUT

VIEWED FROM BACK OF WASHER

FROM SUD S WATER STORAGE TUBS

TO SUDS WATER STORAGE TUBS

MANUAL FILTER

PUMPFOUR-PORT

MANIFOLDTRAPTWO-WAY

VALVE

WATERFLOW

TO SUDSSTORAGE

MANUAL FILTER

PUMPFOUR-PORT

MANIFOLDTRAPTWO-WAY

VALVE

WATERFLOW

MANUAL FILTER

PUMPFOUR-PORT

MANIFOLDTRAPTWO-WAY

VALVE

WATER FLOWFROM

STORAGE TUBS

MANUAL FILTER

PUMPFOUR-PORT

MANIFOLDTRAPTWO-WAY

VALVE

WATERFLOW

TO DRAIN

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FILTERING

PUMP-OUT


FROM SUD S WATER STORAGE TUBS

TO SUDS WATER STORAGE TUBS

MANIFOLDTRAP

PUMPTWO-PORT

TWO-WAYVALVE

FILTER

SIDE CHECKVALVE

WATERFLOW

MANIFOLDTRAP

PUMPTWO-PORT

TWO-WAYVALVE

FILTER

SIDE CHECKVALVE

WATER FLOWFROM SUDSSTORAGE

MANIFOLDTRAP

PUMPTWO-PORT

TWO-WAYVALVE

FILTER

SIDE CHECKVALVE

WATERFLOW

TODRAIN

MANIFOLDTRAP

PUMPTWO-PORT

TWO-WAYVALVE

SIDE CHECKVALVE

WATERFLOW

TO SUDSSTORAGE

FILTER

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FILTERS

Ther e ar e two basic types of filters ; the self-clean ingand m anu al clean. During both t he wash a nd rinse

period, water is drawn from the t ub by the pum p or

circulated by the agitator through the filter where

lint is rem oved. The ma nu ally cleaned filter will ha ve

many fingers, or bristles, through which the water

must pass before it enters t he tu b. This acts as a maze

and removes the lint particles. The lint remains in

the filter until such time as it is taken out by the

consu mer a nd clean ed.

For the self-cleaning filter, the same basic water

circulation takes place as with t he ma nu ally cleaned

filter. The lint is collected by various methods. Thisfilter is cleaned during the pump-out period of the

cycle. Cleaning is accomplished by reversing the

water flow through the filter, which flushes the

filter, and car ries the lint out with th e water.

AIR DOME

A plastic air dome on th e side of th e tu b is connected

to the wa ter level pressure switch by a clear plas tic

cont rol hose.

Wat er ent ering the t ub flows into the a ir dome. This

action forces air tha t is already in th e hose upward,

tripping the pressure switch.

NOTE: On all automat ics using a plast ic tub, the air

dome is not serviceable. These a ir domes ar e molded

to the tub.

To rem ove th e dome, first rem ove th e fill cont rol hose.Then depress the dome towards the tub a nd tu rn it

coun te rclockwis e from th e 12 oclock t o th e 9 oclock

position. This will release th e dome an d its sea ling

gasket.

NOTE: When replacing th e new sealing gasket, the

rubber protru sions m ust face th e air dome body for a

proper seal.

PLASTIC MANUAL

FILTER

SELF-CLEAN

TUB MOUNT

FILTER

SELF-CLEAN

RING FILTER BRUSH MANUAL

FILTER

SELF-CLEAN

FILTER

SELF-CLEAN

MANIFOLD

FILTER

FILL CONTROL

HOSE

AIR DOME

PROTRUSIONS

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PU MP GUARD

Atta ched between t he tu b outlet hose and th e pump

is a manifold and trap or pump guard. This pump

guard may be removed to clean any foreign objects

which may be trap ped in it.

The baffle molded in the center reduces the s ucking

noise made by the pu mp du ring operation. The bleed

hole in t he ba ffle can become clogged with lint. Th is

can cause a n a ir locking condition of the pu mp a nd

result in an incomplete pump-out. The obstruction

can be removed thr ough the top of th e pump gua rd.

SID E CHE CK VALVE

The side check valve has two flapper valves within

the body. The lower valve part prevents the waterfrom entering the side of the tub during pump-out.

The other valve part prevents t he pu mp noise from

being transmitted through the drain hose during

recirculation.

WATER INLET

A rubber molded hose is used to carry th e water from

the mixing valve to the water inlet funnel, vacuum

break or nozzle. This nozzle provides an air gap or

vacuum break to prevent th e wash wa ter from being

siphoned back into the wa ter supply.

FLAPPER

VALVES

DRAIN RECIRCULATE

TUB OUTLET HOSE

PUMP

PUMP GUARD

TUB OUTLET HOSE

CLAMP

CLAMP

HOSE

TO PUMP

PUMP GUARD

7/64" BLEED HOLE

IN BAFFLE

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BLEACH/RINSE or F ABRIC

CONDITIONER D ISPEN SER

The electric rinse/bleach or fabric dispensers are

located at th e left front corn er of the machine u nder

the lid an d ar e single load t ype dispensers.

When r inse conditioner or bleach is to be used, pour

the measured amount of liquid from a cup into the

proper dispenser at t he time when cloth es are being

added t o the m achine. The dispensers ar e electrically

controlled to add the liquid through the recirculat-

ing water system into the wash load at the proper

time du ring th e ma chine cycle.

CAUTION: Use only liquid bleach in the bleach

dispenser. Dilut e rinse cond itioner before pourin g int o

rinse conditioner dispenser.

A reservoir for h olding t he liquids is d ivided into twocavities. Each of the dispensers is operated by an

independent solenoid which raises a plunger type

plug, releasing liquid into th e recirculatin g system.

Bleach is dispensed two increments (or 4 minutes)

before the end of the wash period. Then the rinse

conditioner is dispensed dur ing th e deep r inse fill.

Identification of the bleach dispenser hose for all

electric bleach dispensers is shown above. Note the

inch raised protru sions on th e top and bottom of the

hose. These protrusions must be placed at the top

and bottom.

If the protru sions a re in th is position t he slot in the

hose will be perpendicular to th e tu b. This procedure

will eliminate any possibility of water being forced

back up th e hose an d overflowing th e dispenser.

The non-electric bleach dispenser bezel has been

designed so th at while adding bleach, splash ing will

not occur an d cause dam age to clothes in th e basket.

PROTRUSIONS

PROTRUSIONS

VERTICAL

HORIZONTAL

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PUMP

(Direct Drive)

This type of water pump is a non-repairable throw

away pump. It is designed with a ceramic seal for

long life and a self-cleaning straight vained flexible

ru bber impeller. When t he wash er is in a gita tion the

pump impeller is turning to the left (counterclock-

wise). With th e impeller tu rn ing coun terclockwise th e

water is forced back into th e tu b.

During spin a nd pu mp-out the motor r everses, whichturns the pump impeller to the right (clockwise),

which forces the wat er to dra in.

INLE T MIXING VALVE

There a re t wo basic types of water inlet valves used

on a ut oma tic wash ers. There ar e the single solenoid

type shut-off valves and the double solenoid type

mixing valves.

The ma in valve bodies are mad e of nylon an d come

equipped with plastic sealed solenoids.

The valve body has standa rd garden hose threaded

inlets and a 1/2 inch non-threaded outlet . Monel

screens are inserted in the inlets to prevent rust

particles and other foreign matter often found in

water, from en tering t he valve.

Wat er flow th rough t he va lves (both h ot an d cold) is

controlled by individual ru bber diaph ra gms. A spring-

loaded armature, inserted in a solenoid guide, is

secur ed over ea ch dia phr agm on t he valve body by amounting bracket and screws. A solenoid coil is

mount ed over each gu ide, which wh en ener gized pulls

the arm atur e away from the diaphragm, permitting

water to flow into th e ma chine.

Single Solenoid Type

The single inlet valve is mainly a shut-off valve for

controlling water entering the machine. It requires

only one inlet hose which is generally att ached to a

Y hose. Th e Y hose conn ects t o both Hot an d Cold

fau cets wh ich will allow an adjust ment of th e water

temperatur e entering the machine.

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Double Solenoid Type

Wat er inlet valves equipped with t wo inlets ar e called

mixing valves because they actually mix the coldwater with th e hot water.

When a War m wash or r inse selection is ma de, this

valve gives 50% hot wat er a nd 50% cold wat er.

Often a pu mp problem is du e to a foreign object t ha t

gets into the pu mp or its flapper valve and causes it

to stick or bind. With minor disassembly, the object

can be removed and the pump repaired.

If the bear ings ha ve seized, its genera lly ad visable

to replace the complete pump, since the cost of the

labor involved in repla cing bear ings can app roach th e

cost of a new pum p.

Always car efully judge th e cost of th e par t a nd labor

involved in t he r epair versu s t he cost of a complete

new pump before proceeding with field repairs. In

most ins ta nces it is economically advisa ble to replace

the entire pump.

Whenever servicing any pump, always refer to the

service ma nu al for t he corr ect r epair pr ocedur es.

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Automatic Washer Study Course