Shindaiwa 300 Manuel utilisateur

sERVICE

MANUAL

Shindaiwa

Chain Saws

ndaiwa

Service Manual

Shindaiwa

Chain

Saws

Contents Section

page

Model Designation and Identification

2 Troubleshooting . ...................

...

....

3 Carburetors

. 22

Operation . ...... 22

Adjustment.

. .. .

Servicing

...

....

....... ... ... .............

...

4 Recoil Starters . .

...

5 Ignition Systems . ......

Troubleshooting . .

...

.....

...

.. ..

6 Clutches

...

. . .

......

7 Cylinders and Pistons .............

...

8 Engine Crankcase .........

..80

9 Mufflers ....... 92

10 Chain Brakes . .

Oil Pumps . 108

12 Rear Handles and

AJV

Cushions ........ 114

13 Model 357 Top Handle Saw

...

118

14 Appendix

128

Speclfications

....

...

.......

...

128

que

Values . .

...

..... 130

Metric Conversions ............ . .

....

131

lerances

and

Wear Lim

s ......

.....

....

132

Fuel

and

. .

...

134

Special Service

ols . .

...

136

Shindaiw Inc.

1995

Attention

Statements

Throughout this manual are statements

surrounded by boxes and preceded by

special symbols

AWARNING!

A stalement preceded by lhe word

"WAR

" contains information ¡hat

shoul be acted upon

prevenl serious

bodlly Injury.

ATT

ENTI

ON!

A statement preceded by the word

TIE

NTI

contains

ormation that

should

acted upon

avoid damaging

the

saw

Addilional stalements lhat are

! preceded

by symbols are:

IMPORTAN

A slalemel

preceded by "IMPORTANT"

one lhal possesses special significance.

2 e IHnda'wi'l Ine. 1995

)

Model

Designation

and

Identificat

ion

Section 1

Specllicallons

~Cl

;

c~a~ge

lllhoulncll"

Chain Saws

't"lodeI300

Mode/300S

Model360

del377

9 S

hmdaiwa

l1e

1995

Section 1

Model

Designation

and

Identification

Speclf,callOns

sub¡eCIIC

c"anQ"

<,'

1IIoul

noll:e

Chain Saws

MOcle/488

Model575

(680

and

695

similar)

Mode/577

e Shlfldaiwa

¡ne

, ' 5

Model

Designation

and

Identif

cat

ion

Section 1

SpeCilicalions

subjecll

hange

wilh

~otlce

Chain Saws

lode/757

shindaiWa

Mode/357

Sh,nd~,\·)a

lroe

. 1995 5

Section 2

Troubles

hooti

The

2-Stroke

Cycle

Engine

Theory

Operation

Figures

1 and 2 2

A two-stroke cycle or

"two-cycle" engine

produces one

power

stroke for every

revolution

its

crankshaft. Intake

and

compression

occur during the

piston's "up" stroke;

power

and

exhaust

occur during the

"down" stroke.

Six distinct pro-

cesses occur during

every revolution

the crankshaft, and a

1055

weakness

even one

these

processes wi/l affect

the other five.

Piston Ported Induction

Intake

A.SIhe piston moves up towar the c

lnder

head a low pressu

(vacuum)

created

the crankcase.

the movlng pistan uncovers

ltake

por

atmosphenc pr

pushes

a fresh charge

fuel-air nixture

the

crankcase.

The

xture accomp1

hes two functions

befare il is moved

combu

sti

chamber:

•

spended

lhe mi

ure coats all

Internal engine parts

cludlng cylmder

walls crankshaft. and bearings.

• T

atomlzed

fue

xture absorbs hea! as

il enters !he crankcase. lowerlng lhe

engine's opera

ng temperalu

Compression

As t

piston continues lo move upward and

cover lhe cylind

ports, the combust

sealed and compression begins

The

ajr-fu

xture introduced duri

Ihe

rev

olution's lfans/er cycle

now

pped and becomes compressed between

Ihe piston and cy

nder head

3.lgnition

As the piston a proaches the lap t Ihe

cylind

, lhe spark

res and gnl es lhe

-air

xture.

compensale lar increases

in eng

e rpm.

spar

k liming

advanced

electr

ical1y.

Spark plug

Intake

port

open

Vacuum

F/9ure Z 1 Crankcase vac

m;8

creat

dunng

Ihe

compression stroke When Ihe spark

plllg

(¡res ¡he

compressed

mixture al>nve l/

Dlston ¡gil/les

and

begms

ano

Shlndaiwa Inc 1995

Troubleshooting

The

2-Stroke

Cycle

Engine

Section 2

4. Power (combustion)

fuel-air

xture xpands rapldly

burns, forclng

plston dawn

cytlr de

Pistan movement

transferred

tlle eran -

shaft thraugh

the

cannecting rad rotatmg

crankshalt.

5. Exhaust

Exp

Ing

gas es contlnue t

Ihe pistan

downward, exposlng

the

exhaus! port Mas! of

the

spent combustlOn gasse are expelled

through the exhaust port

6. Transfer

The plston's downward movemel l

c;overs

tI'le

Intake port and

covers

the

transler por!

hile simultaneously compressing

the

res

fuel

xture drawn into the crankcase

during S ep 1,

e ¡ransler porl

uncov-

ered, the f esh mi ture

sWlfls

rapidly Irlto tlle

cylinder

the Iresh fuel-alr m xture nters

cylinder

helps

oush or scavengeany FIgW8 ? 2 Ttle

burning

mixture

expands

for ing 1/)",

remalning exhaust gasses out througn the

oistun

down

and

comp

essmg

¡he Iresh

r71l~tllf

the

cr3nkcas

Ihe

plston

exposes

lile

tlansfer

por

exhaust porL

crankcase

pressure

{orces rresh mixture

¡neo

the

combustlon

chamber

and

Ilelps

pus/]

'he

remamine

8\haust

gasses

fhroug/l t

exhausf

port

____

Section 2

Troubleshooting

e 2-

Str

oke

Cycle

ine

Theory of Reed Valve Induction

Operation

used

Model 357

gures 2.3 and 2.4

1.lntake

As the piston moves up toward he cylinde

r·

head, low pressure (vacuum) cre

Ihe

crankcase a

ows almospheric p

ssure

open

e reed valve and push a fresh charge

01luel-air mix

lo the cra

case.

The fuel

-a

mixture

acc

omplishes two

lunctions before

is moved

lhe co l bustlor

chamber

• O

suspended

the mixtu

coa

internal engi

parts includ

g cylinder

wall

cra

sha

, and bearings

• The alomized fuel mixture absorbs heat

from

e crankcas

lowering lhe eng

e's

operating temperatur

Compression

As the pis

ton

con

nues

move upwa

and

ver the cy

nder ports, the co

ustion

chamber is sealed and compression

beg

ins.

The air-tuel mixture intr

oduced

dur

g lhe

previous rev

ution's transler cycle is now

trapped and becomes compressed be ween

Ihe piston and cy

nder head.

3. lgnition

As the pislon approaches Ihe cyl

der head.

the spark plug

res and ignltes lhe fuel-

ases

gine

spark timing is advanced

ectronica

Combustion and Exhaust and Transfer

Compression Ports

losed)

Reed Valve Open

Pressure

2.3

Reed Va

e /ndUC/IOn Syslem (reed va/ve open)

)

Sh'nda,wa Inc.

958

Troubleshooting

The

2-Stroke

Cycle

Engine

Section2

4. Power (combustion)

The fuel-alr

xture expands rapidly

burns. forcing

the

pisten down tlle cyilnder

Pistan movement

lransferred lo the crank-

shaft through

e cennecllng rod, rotaling

tl->e

crankshaft.

5. Exhaust

Expandlng gasses continue

lor e t

pistan

down

Nard,

posing Ihe exllaust porL Mest

the spent combus

Ion

gasses are expelled

lhrough lhe exl1aust port.

6. Transfer

The plslon's downward mevemen!

presses

the

luel

-a

xture drawn

inlc,

the

crankcase du

ng Slep 1, causlng lile reed

valve lo clase,

the movlng pisten uncovers

transfer por\. the resh

!..Ire

swirls

rapioly into

the

cyllnder

e fresh fuel-air

lure enters

cylinder.

also helps o pusl, ar scavenge any

rem

ning exha

gasses out through t

hausl port

Exhaust Port

(ope

Reed Valve

Closed

Figure

2.4

Reeo

Va/ve /nduCltOn Syslem (reel ' va/ve e/oseo)

Autres manuels pour 300

Ce manuel convient aux modèles suivants

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