RS44-52
Table of contents
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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.
English
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 modified without
!
the permission of the manufacturer. Always
use genuine accessories. Non-authorized
modifications 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
operator’s manual.
This label certify that the product has been certified in
accordance with American exhaust requirements EPA 1.
English
– 3
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.
4 –
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 fitted 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 fingers, 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! Mufflers fitted 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
fire!
WARNING! The inside of muffler contain
chemicals that may be carcinogenic. Avoid
!
contact with these elements in the event of a
damaged muffler.
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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
fire. 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.
6 –
English
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.
English
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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.
8 –
English
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.
English
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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 filed 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 fire, explosion and
!
inhaling fumes.
10 –
English
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.
English
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