Jonsered CS 2141 Manual de instrucciones

Workshop manual 108 88 74-26

2– English

English – 3

Workshop manual

Jonsered CS 2141 / CS 2145 / CS 2147/C/W/H /

CS 2149/C/W/H / CS 2150 / CS 2152/C/W/H /

CS 2156/C/W/H / CS 2159/C/W/H

Contents

Introduction ........................................................... 2

Safety regulations ................................................ 3

General instructions ........................................... 3

Special instructions ............................................ 3

Special tools ......................................................... 4

Technical data ....................................................... 6

Construction and function ................................... 8

Carburettor ......................................................... 8

Troubleshooting ................................................. 10

Repair instructions ............................................. 12

Chain brake ...................................................... 12

Silencer ............................................................ 14

Chain catcher ................................................... 14

Stop switch ....................................................... 15

Stop switch – resistance measurement............ 15

Choke control ................................................... 16

Throttle trigger .................................................. 17

Hand grip heater............................................... 18

Starter assembly .............................................. 20

Starter cord....................................................... 21

Recoil spring..................................................... 21

Ignition module – testing .................................. 22

Ignition module and ﬂywheel ............................ 23

Generator ......................................................... 24

Centrifugal clutch.............................................. 26

Oil pump ........................................................... 28

Carburettor ....................................................... 32

Carburettor – pressure testing.......................... 34

Carburettor heater ........................................... 36

Air intake system ............................................. 37

Carburettor – adjustment.................................. 39

Fuel tank........................................................... 41

Fuel ﬁlter........................................................... 42

Fuel hose.......................................................... 42

Piston and cylinder ........................................... 43

Decompression valve – pressure testing ......... 45

Cylinder – pressure testing............................... 47

Crankcase and crankshaft................................ 48

Crankshaft bearings ......................................... 49

Repairing damaged threads ............................. 53

Guide bar bolts ................................................. 54

Appendix A, Carburettor – EPA models ........... 55

4– English

Arrangement of the manual

This workshop manual can be used in two different

ways.

• To repair a speciﬁc sub-assembly on a chainsaw.

• To dismantle and reassemble a complete chain-

saw.

Repairing a speciﬁc sub-assembly

If a speciﬁc sub-assembly on the chainsaw needs

to be repaired:

1. Look up the page referring to the relevant sub-

assembly.

2. Follow the instructions under the headings:

Removal/Dismantling

Cleaning and inspection

Reﬁtting/Reassembly

Dismantling and reassembling the entire chain-

saw

If the entire chainsaw is to be dismantled, follow

the instructions under the heading “Removal/Dis-

mantling”.

Work through the manual and follow the instruc-

tions given in each section under the heading

“Removal/Dismantling”.

Then follow all the “Cleaning and inspection” in-

structions in each section.

Working from the back of the manual, follow all the

instructions under the headings “Reﬁtting/Reas-

sembly” in reverse order.

Each of the sections covering removal/dismantling

and reﬁtting/reassembly include the relevant lubri-

cation instructions and bolt torques for each stage

of repair.

Construction and function

This chapter gives a simple description of the

chainsaw carburettor and its various parts.

Introduction

Troubleshooting

These pages describe the most common faults that

affect a chainsaw. They are divided into four dif-

ferent groups with the most likely faults described

ﬁrst.

Repair instructions

The section that describes how to repair the chain-

saw consists of detailed, step-by-step instructions.

It explains in detail the special tools, lubricants

and bolt torques that are needed when working on

each component.

This workshop manual covers the following

chainsaw models:

CS 2141

CS 2145

CS 2147

CS 2147 C

CS 2147 WH

CS 2147 CWH

CS 2149

CS 2149 WH

CS 2150

CS 2152

CS 2152 C

CS 2152 WH

CS 2152 CWH

CS 2156

CS 2156 C

CS 2156 WH

CS 2156 CWH

CS 2159

CS 2159 C

CS 2159 WH

CS 2159 CWH

English – 5

General instructions

This workshop manual gives detailed instructions

on how to troubleshoot, repair and test a chain-

saw. This section also describes the various safety

precautions that should be taken when carrying out

repairs.

The workshop manual has been written for person-

nel who are assumed to have general experience

of repairing and servicing chainsaws.

Workshops where chainsaws are repaired must be

equipped with safety equipment that meets local

regulations.

No-one should carry out repairs on a chainsaw

until they have read and understood the contents

of this workshop manual.

Chainsaws are type-approved to meet the relevant

safety legislation, but this only applies when the

saw is ﬁtted with the cutting equipment speci-

ﬁed in the user’s manual. The ﬁtting of any other

equipment, or of accessories or parts that are not

approved by Jonsered, could mean that the saw

no longer meets these safety requirements and

the person who carried out the work may be held

responsible for its non-conformance.

In this workshop manual the following boxes indi-

cate where caution should be taken.

Special instructions

The fuel that is used in a chainsaw poses the fol-

lowing hazards:

• The fuel and its fumes are toxic.

• May cause irritation to skin or eyes.

• May cause breathing difﬁculties.

• Highly ﬂammable.

When using compressed air the air jet should

never be pointed at the body. Air can be forced into

the bloodstream and cause fatal injury.

Wear ear protection when testing saws.

After testing a saw do not touch the silencer until

it has cooled down. The silencer gets very hot and

you may burn yourself. Wear protective gloves

when working on the silencer.

The guide bar, chain and clutch cover (chain

brake) must be ﬁtted before the saw is started. If

not, the clutch may come loose and cause injury.

Poor chain lubrication can result in failure of the

chain, which could cause serious or fatal injury.

Take care to ensure that the spring inside the

starter assembly does not ﬂy out and cause injury.

Wear eye protection. If the spring is under com-

pression when the pulley is removed it could ﬂy out

and cause injury.

Before removing the tensioning spring from the

chain brake, ensure that the brake is in the on po-

sition, otherwise the spring may ﬂy out and cause

injury.

After completing the repair the chain brake must be

tested, see “Chain brake – reassembly \ Operating

test”.

Always consider the ﬁre risk. A chainsaw can pro-

duce sparks that could start a ﬁre.

Inspect the chain catcher and replace it if it is dam-

aged.

WARNING!

The warning text warns of the risk

of personal injury if the instruc-

tions are not followed.

NOTE!

The warning text warns of the risk of ma-

terial damage if the instructions are not

followed.

Safety regulations

6– English

Special tools

11 12

123

English – 7

Item Description Used for Order no.

1 Clutch tool Centrifugal clutch 502 54 16-02

2 Piston stop Locking crankshaft 502 54 15-01

3 Stop plate Locating intake gaiter 502 54 17-01

4 Fuel ﬁlter hook Withdrawing the fuel ﬁlter 502 50 83-01

5 Allen key For M5 bolts 502 50 18-01

6 Puller Frame bearing 504 90 90-02

7 Removal tool Remove seal from clutch side 502 50 55-01

Mandrel, sealing ring

Removing crankshaft 502 54 21-01

9 Cover plate

Sealing during pressure testing

502 54 11-02

10 Pressure tester Connection to cylinder 503 84 40-02

11 Feeler gauge Adjusting ignition module 502 51 34-02

12 Clamp stand Clamping the saw 502 51 02-01

13 Clutch tool Centrifugal clutch 502 52 22-02

14 Pressure gauge Pressurisation during testing 502 50 38-01

15 Piston ﬁtting kit Fitting piston 502 50 70-01

16 Test plug Checking ignition module 502 71 13-01

17 Rev counter Adjusting carburettor 502 71 14-01

18 Removal tool Removing crankshaft 502 51 61-01

19 Vacuum gauge Vacuum test 502 50 37-01

20 Assembly pliers Fitting spark plug guard 502 50 06-01

21a Sleeve Fitting crankshaft 502 50 30-18

21b Shaft extension Flywheel side 502 50 30-18

21c Shaft extension Clutch side 502 50 30-18

22 Stop plate Removing crankshaft 502 54 18-01

23 Assembly tool

Assembling spring, chain brake

502 50 67-01

24 Crankshaft tool Fitting crankshaft seal 502 50 30-16

Special tools

15 16 17

21 b

21 c

21 a

8– English

Displacement Cylinder bore Stroke Max power/speed

cm3/cubic inches Ø mm/Ø inches mm/inches kW/hp/rpm

CS 2149/W: 49,4 / 3,0 44 / 1,73" 32,5 / 1,28" 2,3/ 3,1 /9 000

CS 2150: 49,4 / 3,0 44 / 1,73" 32,5 / 1,28" 2,3/ 3,1 /9 000

CS 2141: 40,8 / 2,5 40 / 1,57" 32,5 / 1,28" 2,0 / 2,7 / 9 000

CS 2145: 45,0 / 2,75 42 / 1,65" 32,5 / 1,28" 2,2 / 3,0 / 9 000

CS 2147/C/W/H: 45,0 / 2,75 42 / 1,65" 32,5 / 1,28" 2,5 / 3,4 / 9 600

CS 2152/C/W/H: 51,7 / 3,2 45 / 1,77" 32,5 / 1,28" 2,4 / 3,3 / 9 000

CS 2156/C/W/H: 56,5 / 3,45 46 / 1,81" 34,0 / 1,34" 3,2 / 4,35 / 9 600

CS 2159/C/W/H: 59,0 / 3,6 47 / 1,85" 34,0 / 1,34" 3,0 / 4,1 / 9 000

Spark plug gap Ignition system Air gap Carburettor type

mm/inches mm/inches

CS 2149/W: 0,5 / 0,02" SEM CD 0,3 / 0,012" ZAMA C3-EL17

(EPA) ZAMA C3-EL18

CS 2141/CS 2145/

CS 2150: 0,5 / 0,02" SEM CD 0,3 / 0,012" Walbro HDA 195

(EPA) ZAMA C3-EL18

CS 2147/C/W/H: 0,5 / 0,02" SEM CD 0,3 / 0,012" ZAMA C3-EL 17

CS 2152/C/W/H: 0,5 / 0,02" SEM CD 0,3 / 0,012" ZAMA C3-EL17

(EPA) ZAMA C3-EL18

CS 2156/C/W/H: 0,5 / 0,02" SEM CD 0,3 / 0,012" Walbro HDA 198

(EPA) Walbro HDA 199

CS 2159/C/W/H: 0,5 / 0,02" SEM CD 0,3 / 0,012" Walbro HDA 198/190 (H)

(EPA) Walbro HDA 199/191 (H)

Effective cutting length Chain speed at Chain pitch Drive link

cm/inches max power – revs mm/inches mm/inches

m/s – rpm

CS 2149/W: 30-48 / 12"-19" 17,3 / 9 000 8,25 / 0,325" 1,3 / 0,050" - 1,5 / 0,058"

CS 2141/CS 2145/

CS 2150: 30-43 / 12"-17" 17,3 / 9 000 8,25 / 0,325" 1,3 / 0,050" - 1,5 / 0,058"

CS 2147/C/W/H: 30-48 / 12"-19" 18,5 / 9 600 8,25 / 0,325" 1,3 / 0,050" - 1,5 / 0,058"

CS 2152/C/W/H 30-48 / 12"-19" 17,3 / 9 000 8,25 / 0,325" 1,3 / 0,050" - 1,5 / 0,058"

CS 2156/C/W/H: 30-48 / 12"-19" 21,4 / 9 600 8,25 / 0,325" 1,5 / 0,058"

9,52 / 3/8"

CS 2159/C/W/H: 31-48 / 12"-19" 20 / 9 000 8,25 / 0,325" 1,5 / 0,058"

9,52 / 3/8"

Technical data

English – 9

Technical data

Idling speed Engagement speed Max. speed Spark plug

rpm rpm rpm

CS 2149/W: 2 700 3 800 13 000 NGK BPMR 7A, Champion RCJ 7Y

CS 2141/CS 2145/

CS 2150: 2 700 3 800 12 500 / 12 500 / NGK BPMR 7A, Champion RCJ 7Y

13 000

CS 2147/C/W/H: 2 700 3 800 14 200 NGK BPMR 7A, Champion RCJ 7Y

CS 2152/C/W/H: 2 700 3 800 13 000 NGK BPMR 7A, Champion RCJ 7Y

CS 2156/C/W/H: 2 700 3 700 14 000 NGK BPMR 7A, Champion RCJ 7Y

CS 2159/C/W/H: 2 700 3 800 13 500 NGK BPMR 7A, Champion RCJ 7Y

Fuel tank capacity Oil pump capacity at Oil tank capacity Automatic oil pump

Litres/US pints 9,000 rpm, Litres/US pints

ml/min

CS 2149/W: 0,5 / 1,06 5 - 12 0,28 / 0,59 Yes

CS 2141/CS 2145/

CS 2150: 0,5 / 1,06 9 / 9 / 5-12 0,25 / 0,53 Yes

CS 2147/C/W/H: 0,5 / 1,06 5 - 12 0,28 / 0,59 Yes

CS 2152/C/W/H: 0,5 / 1,06 5 - 12 0,28 / 0,59 Yes

CS 2156/C/W/H: 0,68 / 1,43 6 - 17 0,38 / 0,80 Yes

CS 2159/C/W/H: 0,68 / 1,43 6 - 17 0,38/ 0,80 Yes

Weight without bar and chain Weight with bar and chain Heated hand grips

kg / lbs kg / lbs

CS 2149: 4,9 / 10,8 5,7 / 12,4 -

CS 2149 W: 5,0 / 11,0 5,8 / 12,4 Yes

CS 2141/CS 2145/

CS 2150: 4,9 / 10,8 5,7 / 12,4 -

CS 2147/C: 5,0 / 11,0 5,8 / 12,6 Yes

CS 2147 WH/CWH: 5,1 / 11,2 5,9 / 13,0 Yes

CS 2152/C: 5,0 / 11,0 5,8 / 12,6 -

CS 2152 W/WH/

CW/CWH: 5,1 / 11,2 5,9 / 13,0 Yes

CS 2156/W/H: 5,6 / 12,4 6,4 / 14,1 Yes

CS 2156 C/CWH: 5,7 / 12,6 6,5 / 14,3 Yes

CS 2159/C: 5,6 / 12,4 6,4 / 14,1 -

CS 2159 W/H: 5,7 / 12,6 6,5 / 14,3 Yes

rpm



GAS

OIL

10 – English

The carburettor works in different ways depending

on the setting:

• Cold start mode

• Idling mode

• Part throttle mode

• Full throttle mode

In the cold start mode the choke valve (D) is

completely closed. This increases the vacuum in

the carburettor so that fuel is sucked through the

diffuser jets faster (E).

In idling mode the throttle valve (F) is closed. Air

is sucked through an aperture in the throttle valve

and a small amount of fuel is supplied through the

diffuser jet (E).

Construction and function

Carburettor

The carburettor consists of three sub-systems:

• The metering unit (A) which contains the jets

and the fuel control mechanism. This measures

out the right amount of fuel to suit the speed of

the saw and the power demand.

• The mixing unit (B) consists of the choke, dif-

fuser jets and throttle valve. This is where the air

and fuel are mixed to create a ﬂammable mix-

ture.

• The pump unit (C) pumps fuel from the tank to

the metering system inside the carburettor. One

side of the pump diaphragm is connected to the

crankcase and pulses as a result of pressure

changes in the crankcase. The other side of the

diaphragm sucks in the fuel.

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