7877724 understanding automatic was her

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STUDY COURSE

(DIRECT DRIVE MODELS)

UNDERSTANDING AUTOMATIC WASHER:

MECHANICAL COMPONENTS

Module 4

LIT 787772 Rev. B

AUTOMATIC WASHER


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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

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

The tra demarks WHIRLPOOL , , , andFSP ar e registered

tr 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 ......................................................................................... 3MECHANICAL COMPONENTS

*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 4, r i g h t

a fter s tud ying i t .

PAGE

TABLE of CONTENTS

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The a ction of th e agita te cam a nd cam follower allow

th e agitat e gear to be forced down by spr ing action.

This allows it to engage th e splines on t he a gitator

shaft.

Power for the agitate gear will be supplied by the

connecting rack which moves back and forth as it

rotat es around t he cam on th e main drive gear.

When the drive motor rotates clockwise, the main

drive gear in th e gearcase r otates counterclockwise,putting th e washer into the drain/spin m ode.

This time the shift actuator moves forward on the

other side and pushes th e agitate cam in the other

direction. This causes th e cam follower t o push the

agitat e gear up a nd t hen lift it off th e splines on the

agitator shaft.

NOTE: During spin, th e connecting ra ck dr ives the

agitat e gear in an oscillatory motion. Now since the

agitate gear and agitate clutch are disengaged, this

motion IS NOT tra nsferred to the agitator sha ft.

SPRING

AGITATE

CAM

CAM

FOLLOWER

AGITATEGEAR

SPLINES

MAIN DRIVE GEAR

CONNECTING

RACK

AGITATE

GEAR

MAIN

DRIVE

GEAR

MAIN

DRIVE

GEAR

SHIFTACTUATOR

AGITATE

GEAR

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PU MP OUT BEFORE SPIN

(Neutral Drain)

A system chan ge was pha sed into production on a ll

direct drive washers wh ich will let the wash er pum p

out th e water before th e basket spins. This system is

referred to as Neutra l-Drain.

Some previous direct dr ive washer s pum ped out th e

water while the basket was spinning. This system

was called Direct-Into-Spin.

A new gearcase, timer and water level switch are

required with the Neutral-Drain system. This new

gearcase has the part nu mber and the word Neutra l

sta mped on t he cover.

NOTE: Gearcases cannot be interchanged between

th e two systems becaus e of th e opera tiona l differences

of the Neutral-Drain mechanism.

NEU TRAL DRAIN COMP ONENTS

SPIN GEAR has a molded bum p on one of three

bosses. This bump is required du ring th e reset mode

of the neut ral dra in mechan ism.

CAM DELAY SPRING provides proper force to

spin gear cam.

SPIN GEAR CAM a coun ting device to reset th e

neutra l drain mechan ism. Cam is mount ed to hub of

spin gear.

S PIN PAWL functions to drive the spin gear.

TRIP LEVER engages cam teeth. The molded

bump of the spin gear boss contacts the trip lever

which will lift it off the cam and advance it to the

next cam tooth du ring the reset m ode of th e neutr al

drain m echan ism.

LATCH holds spin gear cam stat iona ry to allow

for neutr al drain pu mpout prior to spin.

PAWL ST UD at taches rack reta iner to ma in drivegear an d provides mount ing for spin pawl.

RACK RETAIN ER provides two locator pins and

two tabs for moun ting neut ral dra in component s.

SPIN GEAR

SPIN GEAR SPRING

CAM DELAY SPRING

SPIN GEAR CAM

SPIN PAWL

LATCH

PAWL STUDTRIP

LEVER

SPIN GEAR HUB

RACK RETAINER

DIRECT-INTO-SPIN NEUTRAL DRAIN

SPIN GEAR

SPIN GEAR

HUB

CAM DELAY

SPRING

LATCH

RACK RETAINER

SPIN GEAR

CAM

SPIN PAWL

TRIP LEVER

PAWL

STUD

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NEUTRAL DRAIN OPERATION

Reset During Agitat ion

1. The gearcase will always provide direct into

spin without draining first, EXCEPT when

reset, dur ing a brief agitation period.

2. During this agi tat ion per iod, the main dr ive

gear and neutral drain mechanism rotate

clockwise and the spin gear is idle.

3. The t r ip lever (A) holds the spin gear cam at

the cam t eeth, which cau ses it to slip on the

spin gear h ub.

4. Each revolution of the main drive gear causes

th e tr ip lever t o lift off an d m ove one cam

tooth as it cont acts th e bump (B) on t he spin

gear boss.

5. To reset the mechanism to Neutral Drain, the

trip lever must advan ce past all of the cam

teeth a nd catch th e (C) notch in th e cam. This

locks the cam t o the tr ip lever a nd lets it slip

on th e spin gear hu b.

6. In this locked position, the spin pawl is held

inward becau se th e (D) pawl ta il is riding onthe cam.

Pu mp-Out Mode (Drain)

1. During pump-out (drain), the motor reverses

direction. The main drive gear and neutr al

mechan ism will now rotat e coun terclockwise.

During this mode, the spin gear is idle.

2. During the fi rst few revolut ions, the t r ip

lever (A) which is cont acted by t he sp in gear

bump, is lifted off and m oves to the n eutr al

lobe (B) of th e spin gear cam . While in this

position, contact cannot be made with the

butt on on t he spin gear.

3. During these few revolutions, centrifugal

force cau ses the lat ch to pivot outwa rd a t th e

larger end. The opposite end of the latch ha s

a n otch (C) which catches th e cam an d causes

it to slip on the spin gear hu b. The spin pawlta il (D) is still riding against the cam , which

holds th e pawl inwar d.

4 . The motor runs and pumps out the water for

a p re-set time cont rolled by th e timer.

A

B

C

D

A

B

C

D

LATCH

OUT

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Pau se Shift to Spin

1. At the end of pump-out , the washer wil l s top

and pause for about three-to-five seconds.During t his timer controlled pau se, the latch

(A) will release the spin gear cam. The spin

gear cam is then free to rotate pa st th e latch

toward the spin pa wl.

Spin Mode

1. Fol lowing the pause, the motor will restar t ,

causing the neutral mechanism to rotate

counterclockwise.

2. The cam (B) rotates around and contacts the

spin pa wl moving it out war d. This will allow

th e pawl to ma ke conta ct with one of th e thr ee

bosses (C) on t he bott om of th e spin gear, now

causing it to spin.

3. The spin gear dr ives the spin pinion, which

rotates the clutch drum. The clutch lining

spring contacts and rotat es the brake r elease

cam. When t he brak e is released, the basket

spins.

The clutch hub is attached to the spin pinion gear.

As the spin pinion gear turns, the clutch hub also

tur ns. The clutch lining is forced against th e clut ch

hub by the clutch spring. As the clutch hub turns,

friction between it an d th e clutch lining causes th e

clutch lining to turn . As the clutch tur ns, th e tab th at

holds the clutch spring on the lining, contacts the

brake cam driver, releasing the brake. The tab on

the clutch lining remains in contact with the brakecam drivers, holding the brake released and then

providing power to the spin tube through the brake

release. The basket is at tached to the spin tube with

a d rive block.

NOTE: When th e machine sh ifts out of th e spin mode,

pressu re is removed from th e brake cam dr iver which

allows the brake linings to expand outward, then

contacting the brake drum which stops the basket

from spinn ing.

BRAKE

LININGSCLUTCH

LINING

CLUTCH HUBSPIN

PINION

GEAR

CLUTCH

SPRING

TAB

BRAKE

CAM DRIVER

CLUTCH HUB

is mounted to the

SPIN PINION GEAR

A

LATCH

IN

C

B

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AGITATORS

The purpose of the agitator is to provide a proper

washing action by moving the water and clothesaround in the basket.

There a re th ree basic designs of agitat ors used. They

ar e th e one piece agitat or, the t wo piece agitat or or

the auger agitator where by the bottom part moves

back and forth and the top part only moves in one

direction.

These agitat ors are pr essed directly onto th e splined

agitator shaft. A screw and rubber washer screwed

into the t op of the agitat or shaft, is used to hold the

agitat or down.

TU B

Tubs are made of a plastic material and will cause

almost no service problems.

This tub is secured to the susp ension plat e with six

screws.

TUB RING

The t ub r ing, or splash shield, fits on top of th e tu b

an d sna ps in place. A ru bber gasket is u sed between

the tub an d tub ring.

The pur pose of the tu b ring is to prevent wat er from

going over th e tub ring dur ing spin or splashing over

the top during agitation.

BASKET

The pu rpose of the ba sket is to hold the cloth es while

they are being washed a nd spu n dr y.

The basket has a porcelain finish and is perforated

t o a l l ow t he wa t e r t o be f r ee - f l owi ng du r i ng

recirulation and draining.

If the bask et is loose on th e spin t ube, it will cau se

excessive noise. Check the drive block to make sure

the cut -outs ar e positioned over the t abs on th e spin

tube, then m ake sur e the span ner (lock) nu t is tight .

Examine the inside of the basket to be certain that

there are no sharp edges or perforations that might

cause clothing dam age. If rough spots a re foun d, san d

or bu rr them off. Seal th e san ded ar eas with epoxy.

TUB SUP PORT and BRAKE

The tub support and bra ke contains the bearings and

seals for the brake and dr ive tube. The tub and

gearcase are mounted to this support.

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SUSP ENSION PLATE

This is a tr iangular design par t, located between the

base an d tub su pport. This part a lso ha s thr ee teflon

coat ed pads which are locat ed in such a way th at t he

thr ee legs on th e tub support ride on them.

BASE

This base is a t hr ee-legged part which provides the

support for t he m oun ting of the su spension plat e, tub

support, gearcase, drive motor a nd pu mp.

The rear panel and wrap-around cabinet are also

mount ed to the base. This base has t hr ee teflon coat ed

pads. One each is located on each of the legs and is

used for t he su spension plat e to slide or m ove ar oun dduring wash and spin.

CABINET REMOVAL

Removing the cabinet t o get at th e component s is very

easy.

Using a screwdriver, remove the screw (one on each

side) from t he front of each en d cap.

Pu ll forward a nd u p on th e console and lay it ba ck on

the hinges.

Disconnect t he h ar ness conn ector by pressing on th e

tab (located in t he m iddle), and pu lling u p.

Insert a flat blade screwdriver into the turned-up

edge of th e clip (located on both sides), and t hen pry

back to release th e clip from th e hole in t he cabinet.

Open an d hold the lid while grabbing th e cabinetfrontopening. Tilt the top of the cabinet toward you by

pulling the cabinet away from the base.

This releases th e front an d back slots of the cabinet

from the t abs in th e front a nd back of the ba se.

Using the side of your leg and/or body as a support

for the front of the cabinet, carefully lift up and set

the cabinet aside.

REAR SLOT

(EACH SIDE)

FRONT SLOT

(EACH SIDE)

REAR TAB

(EACH SIDE)FRONT TAB

(EACH SIDE)

PADS

PADS

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NOTES

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NOTES

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NOTES

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