Jonsered RS44-52 User Manual

Operator’s manual
Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.
(EPA)
KEY TO SYMBOLS

Symbols

WARNING! Clearing saws, brushcutters and trimmers can be dangerous! Careless or incorrect use can result in serious or fatal injury to the operator or others.
Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.
Always wear:
A protective helmet where there is a risk of falling objects
Hearing protection
Approved eye protection
Max. speed of output shaft, rpm
Watch out for thrown objects and ricochets.
Switch off the engine by moving the stop switch to the STOP position before carrying out any checks or maintenance.
Always wear approved protective gloves.
Regular cleaning is required.
Visual check.
Approved eye protection must always be used.
The operator of the machine must ensure, while working, that no persons or animals come closer than 15 metres.
Machines fitted with saw blades or grass blades can be thrown violently to the side when the blade comes into contact with a fixed object. The blade is capable of amputating an arm or leg. Always keep people and animals at least 15 metres from the machine.
Arrows which show limits for handle positioning.
Always wear approved protective gloves.
Wear sturdy, non-slip boots.
15 m
1
5 m
50FT
T
F
50
Only use non-metallic, flexible cutting attachments, i.e. trimmer heads with trimmer cord.
Other symbols/decals on the machine refer to special certification requirements for certain markets.
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2 –
IMPORTANT ENGINE INFORMATION
TWC
JONSERED HUSKVARNA SWEDEN
REFER TO OPERATOR`S MANUAL FOR
MAINTENANCE SPECIFICATIONS AND ADJUSTMENTS.
FOR SMALL NON - ROAD ENGINES.
EPTHIS ENGINE CONFORMS TO U.S. PH1A

CONTENTS

Contents Note the following before starting:

KEY TO SYMBOLS
Symbols ....................................................................... 2
CONTENTS
Contents ...................................................................... 3
Note the following before starting: ................................ 3
SAFETY INSTRUCTIONS
Personal protective equipment ..................................... 4
Machine ′ s safety equipment ........................................ 4
Checking, maintaining and servicing the machine ′ s
safety equipment .......................................................... 6
Cutting equipment ........................................................ 8
General safety precautions .......................................... 10
General working instructions ....................................... 11
Basic working techniques ............................................ 11
WHAT IS WHAT?
What is what on the clearing saw? (RS44)................... 15
What is what on the clearing saw? (RS52)................... 16
ASSEMBLY
Assembling the handlebar and throttle ........................ 17
Transport position, handlebar ...................................... 17
Fitting blades and trimmer heads ................................. 17
Fitting a blade guard, grass blade and grass cutter ..... 18
Fitting the blade guard and saw blade ......................... 18
Fitting the trimmer guard and trimmer head Trimmy SII 19
Fitting other guards and cutting attachments ............... 19
Adjusting the harness and clearing saw ...................... 20
FUEL HANDLING
Fuel .............................................................................. 21
Fuelling ........................................................................ 21
STARTING AND STOPPING
Check before starting ................................................... 22
Starting and stopping ................................................... 22
MAINTENANCE
Carburettor ................................................................... 24
Muffler .......................................................................... 25
Cooling system ............................................................ 25
Air filter ......................................................................... 26
Bevel gear .................................................................... 26
Spark plug .................................................................... 26
Sharpening grass cutters and grass blades ................. 26
Filing the saw blade ..................................................... 27
Maintenance schedule ................................................. 27
TECHNICAL DATA
Technical data .............................................................. 28
FEDERAL EMISSION CONTROL WARRANTY STATEMENT
YOUR WARRANTY RIGHTS AND OBLIGATIONS ..... 29
Jonsered has a policy of continuous product development and therefore reserves the right to modify the design and appearance of products without prior notice.
Long-term exposure to noise can result in permanent hearing impairment. So always use approved hearing protection.
Maintenance, replacement, or repair of the emission control devices and system may be performed by any nonroad engine repair establishment or individual.
WARNING! Under no circumstances may the design of the machine be modied without
!
the permission of the manufacturer. Always use genuine accessories. Non-authorized modications and/or accessories can result in serious personal injury or the death of the operator or others.
Your warranty may not cover damage or liability caused by the use of non-authorized accessories or replacement parts.
WARNING! A clearing saw, brushcutter or trimmer can be dangerous if used
!
incorrectly or carelessly, and can cause serious or fatal injury to the operator or others. It is extremely important that you read and understand the contents of this operators manual.
This label certify that the product has been certified in accordance with American exhaust requirements EPA 1.
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SAFETY INSTRUCTIONS

Personal protective equipment

IMPORTANT! Whenever you use a clearing saw, brushcutter or trimmer you must wear personal protective equipment that is approved by the authorities. Personal protective equipment does not eliminate the risk of accidents, but it can reduce the effects of an injury in the event of an accident. Ask your dealer for help when choosing protective equipment.
WARNING! Listen out for warning signals or shouts when you are wearing hearing
!
protection. Always remove your hearing protection as soon as the engine stops.
HELMET
A helmet should be worn if the trees being cleared are taller than 2 m.
HEARING PROTECTION
Wear hearing protection that provides adequate noise reduction.
CLOTHING
Wear clothes made of a strong fabric and avoid loose clothing that can catch on twigs and branches. Always wear heavy, long pants. Do not wear jewellery, shorts sandals or go barefoot. Secure hair so it is above shoulder level.
FIRST AID KIT
Always have a first aid kit nearby.
Machine ′′
This section describes the machine ′ s safety equipment, its purpose, and how checks and maintenance should be carried out to ensure that it operates correctly. See the ”What is what?” section to locate where this equipment is positioned on your machine.
The life span of the machine can be reduced and the risk of accidents can increase if machine maintenance is not carried out correctly and if service and/or repairs are not carried out professionally. If you need further information please contact your nearest service workshop.
!
′′
s safety equipment
WARNING! Never use a machine that has faulty safety equipment! Carry out the inspection, maintenance and service routines listed in this section.
EYE PROTECTION
Always wear approved eye protection. If you use a visor then you must also wear approved protective goggles. Approved protective goggles must comply with standard ANSI Z87.1 in the USA or EN 166 in EU countries. Visors must comply with standard EN 1731.
GLOVES
Gloves should be worn when necessary, e.g., when fitting cutting attachments.
BOOTS
Wear sturdy, non-slip boots.

Throttle lock

The throttle lock is designed to prevent accidental operation of the throttle control. When you press the lock (A) (i.e. when you grasp the handle) it releases the throttle control (B). When you release the handle the throttle control and the throttle lock both move back to their original positions. This movement is controlled by two independent return springs. This arrangement means that the throttle control is automatically locked at the idle setting.

Stop switch

Use the stop switch to switch off the engine.
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English
SAFETY INSTRUCTIONS

Cutting attachment guard

This guard is intended to prevent loose objects from being thrown towards the operator. The guard also protects the operator from accidental contact with the cutting attachment.
WARNING! Never use a cutting attachment without an approved guard. See the chapter
!
on Technical data. If an incorrect or faulty guard is tted this can cause serious personal injury.

Vibration damping system

Your machine is equipped with a vibration damping system that is designed to minimise vibration and make operation easier.

Quick release

There is an easily accessible, quick release fitted at the front as a safety precaution in case the engine catches fire, or in any other situation that requires you to free yourself from the machine and harness. See instructions under the heading Adjusting the harness and clearing saw.
Muffler
The muffler is designed to keep noise levels to a minimum and to direct exhaust fumes away from the user.
A muffler fitted with a catalytic converter is also designed to reduce harmful exhaust gases.
Using incorrectly wound cord or a blunt or incorrect cutting attachment (wrong type or incorrectly filed, see instructions under the heading Filing the blade) increases the level of vibration.
The machine ′ s vibration damping system reduces the transfer of vibration between the engine unit/cutting equipment and the machine ′ s handle unit.
WARNING! Overexposure to vibration can lead to circulatory damage or nerve damage
!
in people who have impaired circulation. Contact your doctor if you experience symptoms of overexposure to vibration. Such symptoms include numbness, loss of feeling, tingling, pricking, pain, loss of strength, changes in skin colour or condition. These symptoms normally appear in the ngers, hands or wrists. The risk increases at low temperatures.
In countries that have a warm and dry climate there is a significant risk of fire. We therefore fit certain mufflers with a spark arrestor mesh. Check whether the muffler on your machine is fitted with this kind of mesh.
For mufflers it is very important that you follow the instructions on checking, maintaining and servicing your machine. See instructions under the heading Checking, maintaining and servicing the machine’s safety equipment.
WARNING! Mufers tted with catalytic converters get very hot during use and
!
remain so for some time after stopping. This also applies at idle speed. Contact can result in burns to the skin. Remember the risk of re!
WARNING! The inside of mufer contain chemicals that may be carcinogenic. Avoid
!
contact with these elements in the event of a damaged mufer.
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SAFETY INSTRUCTIONS
WARNING! Bear in mind that:
!
Engine exhaust fumes contain carbon monoxide, which can cause carbon monoxide poisoning. For this reason you should not start or run the machine indoors, or anywhere that is poorly ventilated.
The exhaust fumes from the engine are hot and may contain sparks which can start a re. Never start the machine indoors or near combustible material!

Cutting equipment

Saw blades are intended for cutting fibrous types of wood.
Grass blades and grass cutters are intended for cutting coarse grass.
Checking, maintaining and servicing the machine ′′
IMPORTANT!
All servicing and repair work on the machine requires special training. This is especially true of the machine ′ s safety equipment. If your machine fails any of the checks described below you must contact your service agent. When you buy any of our products we guarantee the availability of professional repairs and service. If the retailer who sells your machine is not a servicing dealer, ask him for the address of your nearest service agent.
The life span of the machine can be reduced and the risk of accidents can increase if machine maintenance is not carried out correctly and if service and/or repairs are not carried out professionally. If you need further information please contact your nearest service workshop.

Throttle lock

Make sure the throttle control is locked at the idle setting when the throttle lock is released.
′′
s safety equipment
A trimmer head is intended for trimming grass.

Locking nut

A locking nut is used to secure some types of cutting attachment.
Press the throttle lock and make sure it returns to its original position when you release it.
Check that the throttle control and throttle lock move freely and that the return springs work properly.
The throttle lock is designed to prevent accidental operation of the throttle control. When you press the lock (A) (i.e. when you grasp the handle) it releases the throttle control (B). When you release the handle the throttle control and the throttle lock both move back to their original positions. This movement is controlled by two independent return springs. This arrangement means that the throttle control is automatically locked at the idle setting.
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SAFETY INSTRUCTIONS
See instructions under the heading Start. Start the machine and apply full throttle. Release the throttle and check that the cutting attachment stops and remains at a standstill. If the cutting attachment rotates with the throttle in the idle position then the carburettor idle setting must be checked. See instructions under the heading Maintenance.

Vibration damping system

Regularly check the vibration damping units for cracks or deformation.
Check that the vibration damping element is undamaged and securely attached.
Muffler

Stop switch

Start the engine and make sure the engine stops when you move the stop switch to the stop setting.

Cutting attachment guard

Ensure that the guard is undamaged and is not cracked.
Replace the guard if it has been exposed to impact or is cracked.
Always use the recommended guard for the cutting attachment you are using. See chapter on Technical data.
Never use a machine that has a faulty muffler.
Regularly check that the muffler is securely attached to the machine.
If the muffler on your machine is fitted with a spark arrestor mesh then it should be cleaned regularly. A blocked mesh causes the engine to overheat, which can lead to serious damage.
Never use a muffler with a defective spark arrestor mesh.
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SAFETY INSTRUCTIONS

Cutting equipment

This section describes how to choose and maintain your cutting equipment in order to:
Reduce the risk of kickback.
Obtain maximum cutting performance.
Extend the life of cutting equipment.
General rules
1 Only use cutting attachments with the guards we
recommend! See the chapter on Technical data.
2 Keep the teeth of the blade correctly sharpened! Follow
our instructions and use the recommended file gauge. An incorrectly sharpened or damaged blade increases the risk of accidents.

Locking nut

When fitting, tighten the nut in the opposite direction to the direction of rotation of the cutting attachment. To remove it, undo the nut in the same direction as the cutting attachment rotates. (CAUTION! The nut has a left-hand thread.)
Tighten the nut using the socket spanner. 35-50 Nm (3.5­5 kpm).
CAUTION! The nylon lining inside the locking nut must not
be so worn that you can turn it by hand. The lining should offer a resistance of at least 1.5 Nm. The nut should be replaced after it has been put on approx. 10 times.
3 Maintain the correct blade setting! Follow our instructions
and use the recommended blade setting tool. An incorrectly set blade increases the risk of jamming and kickback.
4 Check the cutting attachment for damage or cracks. A
damaged cutting attachment should always be replaced.

Quick release

Check that the harness straps are correctly positioned. Once the harness and machine have been adjusted, check that the harness quick release works correctly.
WARNING! Never use a machine with faulty safety equipment. The machine’s safety
!
equipment must be checked and maintained as described in this section. If your machine fails any of these checks contact your service agent to get it repaired.

Cutting equipment

IMPORTANT!
This section describes how to choose and maintain your cutting equipment in order to:
Reduce the risk of kickback.
Obtain maximum cutting performance.
Extend the life of cutting equipment.
Only use cutting attachments with the guards we recommend! See the chapter on Technical data.
Refer to the instructions for the cutting attachment to check the correct way to load the cord and the correct cord diameter.
Keep the teeth of the blade correctly sharpened! Follow our recommendations. Also refer to the instructions on the blade packaging.
Maintain the correct blade setting! Follow our instructions and use the recommended file gauge.
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WARNING! Using an incorrect cutting attachment or an incorrectly sharpened
!
blade increases the risk of kickback.
SAFETY INSTRUCTIONS

Filing the saw blade

See the cutting attachment packaging for correct sharpening instructions. A correctly filed blade is essential for working efficiently and to avoid unnecessary wear to the blade and clearing saw.
Make sure that the blade is well supported when you file it. Use a 5.5 mm round file with a file holder.
The filing angle is 15 ° . File alternate teeth to the right and those in between to the left. If the blade has been heavily pitted by stones it may be necessary to dress the top edges of the teeth with a flat file, in exceptional cases. If so, this should be done before filing with a round file. The top edges must be filed down by the same amount for all the teeth.

Trimmer head

Only use the recommended trimmer heads and trimmer cords. These have been tested by the manufacturer to suit a particular engine size. This is especially important when a fully automatic trimmer head is used. Only use the recommended cutting attachment. See the chapter on Technical data.
Smaller machines generally require small trimmer heads and vice versa. This is because when clearing using a cord the engine must throw out the cord radially from the trimmer head and overcome the resistance of the grass being cleared.
The length of the cord is also important. A longer cord requires greater engine power than a shorter cord of the same diameter.
Make sure that the cutter on the trimmer guard is intact. This is used to cut the cord to the correct length.
To increase the life of the cord it can be soaked in water for a couple of days. This will make the line tougher so that it lasts longer.
IMPORTANT!
Always ensure the trimmer cord is wound tightly and evenly around the drum, otherwise the machine will generate harmful vibration.
Adjust the blade setting. This should be 1 mm.

Sharpening grass cutters and grass blades

See the cutting attachment packaging for correct sharpening instructions.
Sharpen blades and cutters using a single-cut flat file.
Sharpen all edges equally to maintain the balance of the blade.
WARNING! Always stop the engine before doing any work on the cutting attachment.
!
This continues to rotate even after the throttle has been released. Ensure that the cutting attachment has stopped completely and disconnect the HT lead from the spark plug before you start to work on it.
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SAFETY INSTRUCTIONS

General safety precautions

IMPORTANT!
The machine is only designed for trimming grass, grass clearing and/or forestry clearing.
The only accessories you can operate with this engine unit are the cutting attachments we recommend in the chapter on Technical data.
Never use the machine if you are tired, if you have drunk alcohol, or if you are taking medication that could affect your vision, your judgement or your co-ordination.
Never use the machine in extreme weather conditions such as severe cold, very hot and/or humid climates.
Wear personal protective equipment. See instructions under the heading Personal protective equipment.
Never use a machine that has been modified in any way from its original specification.
Never use a machine that is faulty. Carry out the checks, maintenance and service instructions described in this manual. Some maintenance and service measures must be carried out by trained and qualified specialists. See instructions under the heading Maintenance.
All covers and guards must be fitted before starting. Make sure the spark plug cap and HT lead are not damaged. Otherwise you could get an electric shock.
The machine operator must ensure that no people or animals come closer than 15 metres while working. When several operators are working in the same area the safety distance should be at least twice the tree height and no less than 15 metres.
WARNING! Using an incorrect cutting attachment or an incorrectly led blade can
!
increase the risk of accidents.

Fuel safety

Always use a fuel container with an anti-spill valve.
Never refuel the machine while the engine is running. Always stop the engine and let it cool for a few minutes before refuelling.
Make sure there is plenty of ventilation when refuelling or mixing fuel (gasoline and 2-stroke oil).
Move the machine at least 3 m from the refuelling point before starting it.
Never start the machine:
- If you have spilt fuel on it. Wipe off the spillage and
allow remaining fuel to evaporate.
- If you have spilt fuel on yourself or your clothes,
change your clothes. Wash any part of your body that has come in contact with fuel. Use soap and water.
- If the machine is leaking fuel. Check regularly for leaks
from the fuel cap and fuel lines.
- Avoid all skin contact with fuel. Fuel is a skin irritant
and may even cause skin changes.

Transport and storage

Starting

WARNING! When the engine is started with the choke in either the choke or start throttle
!
positions the cutting attachment will start to rotate immediately.
The complete clutch cover and shaft must be fitted before the machine is started, otherwise the clutch can come loose and cause personal injury.
Never start the machine indoors. Exhaust fumes can be dangerous if inhaled.
Observe your surroundings and make sure that there is no risk of people or animals coming into contact with the cutting equipment.
Place the machine on the ground, ensure the cutting attachment is clear of twigs and stones. Hold the body of the machine on the ground using your left hand (CAUTION! Not with your foot). Then grip the starter handle with your right hand and pull the starter cord.
Store and transport the machine and fuel so that there is no risk of any leakage or fumes coming into contact with sparks or naked flames, for example, from electrical machinery, electric motors, electrical relays/switches or boilers.
When storing and transporting fuel always use approved containers intended for this purpose.
When storing the machine for long periods the fuel tank must be emptied. Contact your local gas station to find out where to dispose of excess fuel.
Ensure the machine is cleaned and that a complete service is carried out before long-term storage.
The transport guard must always be fitted to the cutting attachment when the machine is being transported or in storage.
WARNING! Take care when handling fuel. Bear in mind the risk of re, explosion and
!
inhaling fumes.
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SAFETY INSTRUCTIONS

General working instructions

IMPORTANT!
This section describes the basic safety precautions for working with clearing saws and trimmers.
If you encounter a situation where you are uncertain how to proceed you should ask an expert. Contact your dealer or your service workshop.
Avoid all usage which you consider to be beyond your capability.
You must understand the difference between forestry clearing, grass clearing and grass trimming before use.

Basic safety rules

1 Look around you:
To ensure that people, animals or other things cannot affect your control of the machine.
To ensure that people, animals, etc., do not come into contact with the cutting attachment or loose objects that are thrown out by the cutting attachment.
CAUTION! Do not use the machine unless you are able to call for help in the event of an accident.
2 Do not use the machine in bad weather, such as dense
fog, heavy rain, strong wind, intense cold, etc. Working in bad weather is tiring and often brings added risks, such as icy ground, unpredictable felling direction, etc.
3 Make sure you can move and stand safely. Check the area
around you for possible obstacles (roots, rocks, branches, ditches, etc.) in case you have to move suddenly. Take great care when working on sloping ground.
5 Switch off the engine before moving to another area. Fit
the transport guard before carrying or transporting the equipment any distance.
6 Never put the machine down with the engine running
unless you have it in clear sight.

Adjusting the harness and clearing saw

WARNING! When using a clearing saw it must always be hooked securely to the
!
harness. Otherwise you will be unable to control the clearing saw safely and this can result in injury to yourself or others. Never use a harness with a defective quick release. Always use a double harness that distributes the load across both shoulders.

Safety release

At the front is an easily accessible, quick release. Use this if the engine catches fire or in any other emergency situation that requires you to free yourself from the machine and harness.

Basic working techniques

Always slow the engine to idle speed after each working operation. Long periods at full throttle without any load on the engine can lead to serious engine damage.
4 Take great care when cutting a tree that is in tension. A
tree that is in tension may spring back to its normal position before or after being cut. If you position yourself incorrectly or make the cut in the wrong place the tree may hit you or the machine and cause you to lose control. Both situations can cause serious personal injury.

Terms

Forestry clearing is a general term for cutting small trees, during which each stem is cut individually. A saw blade is used.
Brush cutting is a general term for clearing grass. Grass blades and grass cutters are used for this purpose.
Grass trimming is a general term for light clearing, e.g. around edges or around trees. A trimmer head or plastic blades are used.
WARNING! Sometimes branches or grass get caught between the guard and cutting
!
attachment. Always stop the engine before cleaning.
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