Husqvarna 522HS75S Manuale di istruzioni

Workshop manual

522HS75S

English

1008 - 003 - 24.11.2020

Contents

1 Introduction

1.1 Document description............................................ 3

1.2 Target group...........................................................3

1.3 Revisions................................................................3

1.4 Safety..................................................................... 3

1.5 Servicing tools........................................................3

2 Safety

2.1 Safety definitions....................................................4

2.2 General safety instructions.....................................4

2.3 Symbols on the product......................................... 4

3 Prepare and do servicing on the product

3.1 Maintenance schedule........................................... 5

4 Servicing data

4.1 Servicing data ....................................................... 6

5 Servicing tools

5.1 Servicing tools......................................................10

6 Function overview

6.1 Type plate and product serial number..................12

7 Repair instructions

7.1 Product overview for repair instructions............... 13

7.2 To clean and examine the product parts..............13

7.3 Starter.................................................................. 14

7.4 Muffler.................................................................. 17

7.5 Air filter................................................................. 17

7.6 Flywheel............................................................... 18

7.7 Ignition system..................................................... 20

7.8 Carburetor............................................................ 26

7.9 Handle and throttle trigger....................................30

7.10 Clutch, clutch drum and gearbox....................... 31

7.11 Cutting equipment.............................................. 34

7.12 Cylinder and piston............................................ 34

7.13 Crankshaft and crankcase................................. 40

7.14 Fuel tank............................................................ 46

8 Troubleshooting

8.1 Troubleshooting................................................... 48

9 Technical data

9.1 Technical data......................................................52

21008 - 003 - 24.11.2020

1 Introduction

1.1 Document description

This manual gives a full description of how to do

maintenance and repair on the product. It also gives

safety instructions that the personnel must obey.

1.2 Target group

This manual is for personnel with a general knowledge

of how to do repair and do servicing. All personnel that

do repair or do servicing on the product must read and

understand the manual.

1.3 Revisions

Changes to the product can cause changes to the

maintenance work and spare parts. Separate

information is sent out for each change.

Read the manual together with all received information

about changes to maintenance and spare parts for the

product.

1.4 Safety

WARNING: All personnel that repair or do

servicing on the product must read and

understand the safety instructions in this

workshop manual.

1.5 Servicing tools

The manual gives information about necessary servicing

tools. Always use original tools from Husqvarna.

1008 - 003 - 24.11.2020 Introduction - 3

2 Safety

2.1 Safety definitions

Warnings, cautions and notes are used to point out

specially important parts of the manual.

WARNING: Used if there is a risk of injury or

death for the operator or bystanders if the

instructions in the manual are not obeyed.

CAUTION: Used if there is a risk of damage to

the product, other materials or the adjacent area

if the instructions in the manual are not obeyed.

Note: Used to give more information that is necessary in

a given situation.

2.2 General safety instructions

WARNING: Read the warning instructions that

follow before you use the product.

The service center that repairs the product must have

safety devices that obey local regulations. Warnings and

cautions are used to point out specially important parts

of the workshop manual.

2.3 Symbols on the product

Stop.

Be careful and use the product correctly.

This product can cause serious injury or

death to the operator or others.

Read the operator's manual carefully and

make sure that you understand the

instructions before use.

Use approved hearing protection and

approved eye protection.

Use approved protective gloves.

Use heavy-duty slip-resistant boots.

Idle adjustment screw.

High speed needle.

Low speed needle.

Noise emissions to the environment

according to European Directive

2000/14/EC and New South Wales

legislation “Protection of the Environment

Operations (Noise Control) Regulation

2017”. Noise emission data can be found

on the machine label and in the Technical

data chapter.

The product agrees with the applicable

EC directives.

yyyywwxxxx The rating plate shows serial number.

yyyy is the production year and ww is

the production week.

Note: Other symbols/decals on the product refer to

certification requirements for some markets.

4 - Safety 1008 - 003 - 24.11.2020

3 Prepare and do servicing on the product

3.1 Maintenance schedule

Maintenance Before

operation After 40 h After 100

Clean the external surface. After each operation.

Clean the muffler, exhaust pipe and engine from leaves, dirt and unwanted lubri-

cant. After each operation.

Make sure that the cutting attachment does not move at idle speed. X

Do a check of the stop switch. X

Examine the cutting attachment and the cutting attachment guard for damages

and cracks. Replace if it is damaged. X

Examine the hand guard for damages and cracks. Replace if it is damaged. X

Do a check of the throttle trigger lockout and the throttle trigger. X

Examine the engine, the fuel tank and the fuel lines for leaks. X

Tighten nuts and screws. X

Examine the fuel filter for contamination and the fuel hose for cracks and other

defects. Replace if necessary. X

Examine the starter and the starter rope for damages. X

Clean the air filter. Replace if it is necessary. X

Examine the vibration damping units for damages and cracks. X

Examine the spark plug, refer to

To examine the spark plug on page 20

. X

Clean the cooling system. X

Clean the external surface of the carburetor and the area around it. X

Clean or replace the spark arrester mesh. X

Clean the inner surface of the fuel tank. X

Examine the spark plug. X

Make sure that the gear housing is filled with grease. X

1008 - 003 - 24.11.2020 Prepare and do servicing on the

product - 5

4 Servicing data

4.1 Servicing data

▲ Lubricate with 2-stroke oil.

● Lubricate with grease.

T27

5 - 8 Nm

14 mm

6 - 8 Nm

T27

7 - 9 Nm

T27

3 - 4 Nm

T27

2 - 3 Nm

T27

1.5 - 2.5 Nm

T25

2 - 3 Nm

T27

3 - 4 Nm

T27

7 - 10 Nm

T27

1.6 - 3.0 Nm

T27

3 - 4 Nm

6 - Servicing data 1008 - 003 - 24.11.2020

T27

6 - 8 Nm

T27

6 - 9 Nm

10 - 15 Nm

8 mm

6 - 9 Nm

T27

4 - 6 Nm

T27

3 - 5 Nm

1008 - 003 - 24.11.2020 Servicing data - 7

T27

1.5 - 2.5 Nm

T27

4.5 - 5.5 Nm

T27

6 - 8 Nm

T27

6 - 8 Nm

16 mm

10 - 12 Nm

T27

4 - 6 Nm

T27

8 - 10 Nm

T27

3 - 4 Nm

T27

3 - 4 Nm

13 mm

14 - 16 Nm

T27

2.5 - 3 Nm

10 - 12 Nm

T27

3 - 4 Nm

8 - Servicing data 1008 - 003 - 24.11.2020

T27

6 - 9 Nm

T27

3 - 5 Nm

T27

3 - 5 Nm

8 mm

6 - 9 Nm

8 mm

6 - 9 Nm

1008 - 003 - 24.11.2020 Servicing data - 9

5 Servicing tools

5.1 Servicing tools

1 2 3 4

5 6 7 8

9 10 11 12

13 14 15 16

10 - Servicing tools 1008 - 003 - 24.11.2020

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