545RXT AutoTune
®
, 545FX AutoTune
®
,
545FXT AutoTune
®
EN Operator's manual 2-32
Contents
Introduction..................................................................... 2
Safety..............................................................................4
Assembly...................................................................... 10
Operation...................................................................... 14
Maintenance................................................................. 21
Troubleshooting............................................................ 27
Transportation, storage and disposal........................... 27
Technical data.............................................................. 28
Accessories.................................................................. 29
Registered trademarks................................................. 30
Declaration of Conformity............................................. 31
Appendix ......................................................................33
Introduction
Product overview
27
28
29
32
31
10
10
9
8
23
26
24
21
22
1
30
25
4
5
6 7
12
13
11
17
18
15
14
16
2
22
21
23
24
22
3
21
20
19
9
8
1. Grass blade 2. Saw blade
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3. Trimmer head
4. Bevel gear
5. Grease fill cap, bevel gear
6. Shaft
7. Handle adjustment
8. Throttle trigger
9. Stop switch
10. Throttle trigger lockout
11. Suspension point
12. Fuel tank
13. Muffler
14. Spark plug cap and spark plug, below the cover
15. Starter rope handle
16. Air purge bulb
17. Air filter cover
18. Start button
19. Harness, quick-release mechanism
20. Harness, hip pad
21. Drive disc
22. Cutting attachment guard
23. Locknut
24. Support flange
25. Handlebar
26. Support cup
27. Transport guard
28. Hex key
29. Locking pin
30. Operator's manual
31. Socket wrench
32. Harness
Product description
The 545RXT AT, 545FX AT and 545FXT AT are
handheld engine units with interchangeable cutting
attachments. The engine has the AutoTune function.
AutoTune
The carburetor controls the speed of the engine through
the throttle. Air and fuel is mixed in the carburetor. The
AutoTune function adjusts the carburetor automatically
to get the correct air and fuel mixture. AutoTune adapts
the engine to local conditions, such as climate, altitude,
gasoline and type of 2-stroke oil.
Intended use
Use the product with a saw blade, a grass blade or a
trimmer head to cut different types of vegetation. Do
not use the product for other tasks than grass trimming,
grass clearing and forestry clearing. Use a saw blade to
cut fibrous types of wood. Use a grass blade or trimmer
head to cut grass.
Note:
National or local regulations can regulate the
use. Comply to given regulations.
Only use the product with accessories that are approved
by the manufacturer. Refer to
Accessories on page 29
.
Symbols on the product
Stop.
WARNING! This product is dangerous.
Injury or death can occur to the operator
or bystanders if the product is not used
carefully and correctly. To prevent injury
to the operator or bystanders, read
and obey all safety instructions in the
operator's manual.
Please read the operator's manual
carefully and make sure that you
understand the instructions before use.
Use a protective helmet in locations where
objects can fall on you. Use approved
hearing protection. Use approved eye
protection.
Use approved protective gloves.
Use heavy-duty slip-resistant boots.
The product can cause objects to eject,
which can cause injury.
Maximum speed of the output shaft.
5
0
FT
1
5
m
50F
T
15 m
Keep a minimum distance of 15 m to
persons and animals during operation of
the product.
Risk of blade thrust if the cutting
equipment touches an object that it does
not immediately cut. The product can cut
off body parts. Keep a minimum of 15 m
distance to persons and animals during
operation of the product.
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Only use a flexible cutting wire. Do not
use metal cutting elements. Apply this for
grass guard accessory.
Air purge bulb.
Start button.
Fill fuel.
Air intake, summer mode.
Air intake, winter mode.
Noise emission to the environment label
as per EU (also including New South
Wales legislation) and UK directives
and regulations. The guaranteed sound
power level of the product is specified in
Technical data on page 28
and on the
label.
The product agrees with the applicable
EC directives.
This product conforms to the applicable
UK regulations.
The rating plate shows the
serial number. yyyy is the
production year, ww is the
production week.
yyyywwxxxx
Note: Other symbols/decals on the product refer to
certification requirements for other commercial areas.
Euro V Emissions
WARNING: Tampering with the engine
voids the EU type-approval of this product.
Product liability
As referred to in the product liability laws, we are not
liable for damages that our product causes if:
• the product is incorrectly repaired.
• the product is repaired with parts that are not
from the manufacturer or not approved by the
manufacturer.
• the product has an accessory that is not from the
manufacturer or not approved by the manufacturer.
• the product is not repaired at an approved service
center or by an approved authority.
Safety
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.
General safety instructions
WARNING: Read the warning
instructions that follow before you use the
product.
• This product produces an electromagnetic field
during operation. This field may under some
circumstances interfere with active or passive
medical implants. To reduce the risk of serious or
fatal injury we recommend persons with medical
implants to consult their physician and the medical
implant manufacturer before operating this product.
• Do not use the product if you are tired, ill, or
under the influence of alcohol, drugs or medicine.
This has a negative effect on your vision, alertness,
coordination and judgment.
• Do not operate the product in bad weather, such
as dense fog, heavy rain, strong wind and intense
4 171 - 011 - 05.06.2023
cold. To operate the product in bad weather can
make you tired and add risks, such as icy ground
and unpredictable felling direction.
• Always be careful and use your common sense.
If you feel uncertain about a work situation or the
operating procedures after you read the operator's
manual, speak to a servicing dealer before you
continue.
• Remove the spark plug cap if you let the product out
of view.
• A used muffler/spark arrester and spark arrester
mounting face may contain deposits of combustion
particles that may be carcinogenic. Avoid being
exposed to these compounds when handling the
muffler and/or spark arrester. Prior to any handling
of the muffler and/or the spark arrester, refer to
To
do a check of the muffler on page 8
.
Safety instructions for assembly
WARNING: Read the warning
instructions that follow before you use the
product.
• Use approved protective gloves when you assemble
the product and cutting attachment.
• Remove the spark plug cap from the spark plug
before you assemble the product.
• Make sure that the correct handlebar and cutting
attachment guard are assembled before you operate
the product.
• A damaged or incorrect cutting attachment guard
can cause injury. Do not use a cutting attachment
without an approved cutting attachment guard.
• Attach the clutch cover and shaft correctly before
you start the product.
• The drive disc and support flange must engage
correctly in the center hole of the cutting attachment.
A cutting attachment that is attached incorrectly can
cause injury or death.
• Attach the harness to the product to prevent injury to
the operator or others.
Safety instructions for operation
WARNING:
Read the warning
instructions that follow before you use the
product.
• Learn and understand the difference between
forestry clearing, grass clearing and grass trimming
before you use the product.
• Use personal protective equipment, refer to
Personal
protective equipment on page 6
.
• Long-term exposure to noise can result in permanent
hearing loss. Always use approved hearing
protection.
• Listen for warning signals and loud voices when you
use hearing protection. Always remove your hearing
protection when the engine stops.
• Never use the product if it is changed or damaged.
• Make sure that the spark plug cap and ignition lead
are not damaged to prevent the risk of electrical
shock.
• Look around the work area to make sure that no
persons, animals or objects have a negative effect
on the safety of the operation of the product.
• Look around the work area to make sure that no
persons or animals touch the cutting attachment or
are hit by objects that are ejected from the cutting
attachment.
• Do not use the product in a situation or location
where you can not get aid if an accident occurs.
• Do not use the product without an approved cutting
attachment guard.
• Make sure that persons or animals keep a distance
of a minimum of 15 m/50 ft during work. Always look
behind you before you turn around with the product.
Stop the product immediately if a person or animal
enters the 15 m/50 ft safety zone. If more than 1
operator does work in the same area, keep a safety
distance of a minimum of 2 times the tree height and
a minimum of 15 m/50 ft.
• Examine the work area. Avoid loose objects, such as
stones, broken glass, nails, steel wire and string, that
can eject or wind around the cutting attachment.
• Make sure that you can move safely and have a safe
stance. Examine the area around you for obstacles
such as roots, rocks, branch and ditches. Be careful
during work on slopes.
• Do not overreach. Keep a stable position of the feet
and a good balance at all times.
• Before you start the product, put it on a flat surface,
at a minimum ot 3 m/10 ft from the fuel source and
from where you fill fuel. Make sure that there are no
objects near or touching the cutting attachment.
• If the cutting attachment rotates at idle speed, let a
service agent adjust it. Do not use the product until it
is adjusted or repaired.
• Look out for thrown objects. Always use approved
eye protection and keep away from the cutting
attachment guard. Stones and other small objects
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5
can eject into your eyes and cause blindness or
other injuries.
• Do not put the product down with the engine on
unless you have it in clear view.
• Do not remove the cut material, or let other persons
remove cut material, while the engine is on or
the cutting equipment rotates, as this can result in
serious injury.
• Always stop the engine and make sure that the
cutting equipment does not rotate before you remove
material that is wound around the blade shaft or
caught between the cutting attachment guard and
the cutting attachment.
• Be careful when you remove material from around
the cutting equipment. The bevel gear gets hot
during operation and can cause burn injuries.
• The exhaust fumes from the engine are hot and can
contain sparks. Risk of fire. Be careful around dry
and flammable material.
• Never use the product indoors or in spaces lacking
proper ventilation. Exhaust fumes contain carbon
monoxide, an odourless, poisonous and highly
dangerous gas.
• Stop the engine before you move to a new work
area. Always attach the transport guard before you
move the equipment.
• Overexposure to vibration can lead to circulatory
damage or nerve damage in persons who have
poor circulation. Speak to your physician 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 usually
show in the fingers, hands or wrists. The risk
increases at low temperatures.
Personal protective equipment
WARNING:
Read the warning
instructions that follow before you use the
product.
• Always use approved personal protective equipment
when you use the product. Personal protective
equipment cannot fully prevent injury but it
decreases the degree of injury if an accident does
occur. Let your dealer help you select the correct
equipment.
• Use a helmet if the trees in the work area have a
height of more than 2 m/6.5 ft.
• Use approved hearing protection.
• Always use approved protective googles that comply
with ANSI Z87.1 standard in the USA or EN 166 in
EU countries.Use visor for face protection. Visor is
not enough to protect the eyes.
+
• Use gloves when it is necessary, for example when
you attach, examine or clean the cutting equipment.
• Use protective boots with steel toe-cap and non-slip
soles.
• Use clothing made of a strong fabric. Always use
heavy, long pants and long sleeves. Do not use
loose clothing that can catch on twigs and branches.
Do not use jewelry, short pants or sandals. Do not
go with bare feet. Put your hair up safely above
shoulder level.
• Keep first aid equipment near.
Safety devices on the product
For information about where to find the safety devices,
see
Product overview on page 2
.
WARNING:
Read the warning
instructions that follow before you use the
product.
• Do not use a product with damaged safety devices.
Do a check of and do maintenance on the safety
devices regularly. If the safety devices are damaged,
speak to your Husqvarna service agent.
• Do not make changes to safety devices. Do not
use the product if protective covers, safety switches
or other protective devices are not attached or are
damaged.
• For all service and repair work on the product,
especially for the safety devices, special training is
necessary. If the safety devices fail the checks given
in this operator's manual, you must let a service
agent help you. We guarantee that professional
repairs and service is available. If your dealer is not
a service agent, speak to them for information about
the nearest service agent.
• Do not use a cutting attachment without an approved
and correctly attached cutting attachment guard. See
To assemble the cutting equipment on page 11
.
6
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To do a check of the throttle trigger lockout
The throttle trigger lockout locks the throttle trigger at the
idle position.
1. Press the throttle trigger (B) and make sure that it is
locked.
2. Press the throttle trigger lockout (A). Make sure that
the throttle trigger (B) is released.
A
A
B
B
3. Release the handle and make sure that the throttle
trigger lockout (A) and the throttle trigger (B) go back
to their initial positions.
4. Press the throttle trigger lockout (A) and make sure
that it goes back to its initial position when you
release it.
5. Press the throttle trigger (B) and make sure that it
goes back to its initial position when you release it.
6. Start the engine and apply full throttle.
7. Release the throttle trigger and make sure that the
cutting attachment stops.
To do a check of the stop switch
1. Start the engine.
2. Move the stop switch to the stop position and make
sure that the engine stops.
To do a check of the cutting attachment guard
The cutting attachment guard stops objects that ejects in
the direction of the operator. It also prevents injuries that
occur if you touch the cutting attachment.
1. Stop the engine.
2. Do a visual check for damages, for example cracks.
3. Replace the cutting attachment guard if it is
damaged.
To do a check of the vibration damping system
The vibration damping system decreases vibration in
the handles to a minimum which makes the operation
easier.
1. Stop the engine.
2. Do a visual check for deformation and damage for
example, cracks.
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7
3. Make sure you attach the elements of the vibration
damping system are correctly.
To do a check of the quick-release mechanism
WARNING: Do not use a harness with
a damaged quick-release mechanism.
The quick-release mechanism lets the operator remove
the product quickly from the harness if there is an
emergency.
1. Stop the engine.
2. Do a visual check for damage for example, cracks.
3. Release and attach the quick-release mechanism to
make sure that it operates correctly.
To do a check of the muffler
WARNING: Do not use a product with
a damaged muffler.
WARNING: The mufflers become very
hot during and after operation, also at idle
speed. Use protective gloves to prevent burn
injuries.
The muffler keeps noise levels to a minimum and sends
exhaust fumes away from the operator.
1. Stop the engine.
2. Do a visual check for damage and deformation.
WARNING: A used muffler/spark
arrester and spark arrester mounting
face may contain deposits of combustion
particles on the surfaces that may be
carcinogenic. To avoid skin contact
and inhalation of such particles when
cleaning and/or servicing the spark
arrester, make sure you always:
• wear gloves;
• clean and/or service in a well
ventilated area;
• do not use pressurized air to clean
the spark arrester screen;
• use a steel brush and brush away
from your body when cleaning the
spark arrester.
3. Make sure that the muffler is correctly attached to
the product.
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171 - 011 - 05.06.2023
4. If the muffler on your product has a spark arrester
screen, do a visual check.
a) Replace the spark arrester screen if it is
damaged.
b) Clean the spark arrester screen if it is blocked.
See
To clean the muffler on page 22
for more
information.
Cutting attachment
WARNING: Read the warning
instructions that follow before you use the
product.
• Do the regular maintenance. Let an approved
service center regularly examine the cutting
attachment to do adjustments or repairs.
• The performance of the cutting attachment
increases.
• The life of the cutting attachment increases.
• The risk of accidents decreases.
• Only use an approved cutting attachment guard.
Refer to
Accessories on page 29
.
• Do not use a damaged cutting attachment.
Grass trimmer head
• Make sure that you wind the grass trimmer line
tightly and equally around the drum to decrease the
vibration.
• Use only the approved grass trimmer heads and
grass trimmer lines. Refer to
Accessories on page
29
.
• Use a correct length of the grass trimmer line. A long
grass trimmer line uses more engine power than a
short grass trimmer line.
• Make sure that the cutter on the cutting attachment
guard is not damaged.
• Soak the grass trimmer line in water for 2 days
before you attach the grass trimmer line to the
product. This increases the life of the grass trimmer
line.
• Refer to the instructions for the cutting attachment to
use the correct procedure to load the cord and the
correct cord diameter.
Saw blade and grass blade
• Use correctly sharpened blades. An incorrectly
sharpened or damaged blade increases the risk of
injury.
• Use correctly set blades. Correct blade set is 1 mm.
An incorrectly set blade increases the risk of injury
and damage.
• To sharpen and set the blade correctly, refer to the
instructions that come with the blade.
Fuel safety
WARNING: Read the warning
instructions that follow before you use the
product.
• Do not mix the fuel indoor or near a heat source.
• Do not start the product if there is fuel or engine oil
on the product. Remove the unwanted fuel/oil and
let the product dry. Remove unwanted fuel from the
product.
• If you spill fuel on your clothing, change clothing
immediately.
• Do not get fuel on your body, it can cause injury. If
you get fuel on your body, use a soap and water to
remove the fuel.
• Do not start the engine if you spill oil or fuel on the
product or on your body.
• Do not start the product if the engine has a leak.
Examine the engine for leaks regularly.
• Be careful with fuel. Fuel is flammable and the fumes
are explosive and can cause injuries or death.
• Do not breathe in the fuel fumes, it can cause injury.
Make sure that there is sufficient airflow.
• Do not smoke near the fuel or the engine.
• Do not put warm objects near the fuel or the engine.
• Do not add the fuel when the engine is on.
• Make sure that the engine is cool before you refuel.
• Before you refuel, open the fuel tank cap slowly and
release the pressure carefully.
• Make sure there are sufficient airflow when refueling
and mixing fuel (petrol and two-stroke oil) or draining
the fuel tank.
• Fuel and fuel vapor are highly flammable and can
cause serious injury when inhaled or allowed to
come into contact with the skin. For this reason,
observe caution when handling fuel and make sure
there is sufficient airflow.
• Tighten the fuel tank cap carefully or a fire can
occur.
• Move the product at a minimum of 3 m (10 ft) from
the position where you filled the tank before a start.
• Do not put too much fuel in the fuel tank.
• Make sure that a leak cannot occur when you move
the product or fuel container.
• Do not put the product or a fuel container where
there is an open flame, spark or pilot light. Make
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9
sure that the storage area does not contain an open
flame.
• Only use approved containers when you move the
fuel or put the fuel into storage.
• Empty the fuel tank before long-term storage. Obey
the local law on where to dispose fuel.
• Clean the product before long-term storage.
• Remove the spark plug cap before you put the
product into storage to make sure that the engine
does not start accidentally.
Safety instructions for maintenance
WARNING: Read the warning
instructions that follow before you use the
product.
• Stop the engine, make sure that the cutting
attachment stops. Remove the cylinder cover and
disconnect the spark plug cap before you do the
maintenance.
• The exhaust fumes from the engine contain carbon
monoxide, an odourless, poisonous and very
dangerous gas that can cause death. Do not run the
product indoors or in closed spaces.
• The exhaust fumes from the engine are hot and can
contain sparks. Do not run the product indoors or
near flammable material.
• Accessories and changes to the product that are not
approved by the manufacturer, can cause serious
injury or death. Do not change the product. Always
use original accessories.
• If the maintenance is not done correctly and
regularly, there is an increased risk of injury and
damage to the product.
• Only do the maintenance as this operator's manual
recommends. Let an approved Husqvarna service
agent do all other servicing.
• Let an approved Husqvarna service agent do
servicing on the product regularly.
• Replace damaged, worn or broken parts.
Assembly
Introduction
WARNING: Before you assemble the
product, you must read and understand the
safety chapter.
WARNING: Remove the spark plug
cable from the spark plug before you
assemble the product.
To attach the throttle handle
Note: On some models, the throttle handle is attached
at the factory.
1. Remove the nut and screw at the bottom of the
throttle handle.
2. Put the throttle handle onto the right side of the
handlebar.
3. Align the screw hole in the throttle handle with the
hole in the handlebar.
4. Put the screw into the hole at the bottom of the
throttle handle, through the handlebar.
5. Put back and tighten the nut.
To assemble the handlebar
1. Remove the knob and attach the handlebar as given
in the illustration.
2. Tighten the knob lightly.
3. Put on the harness and hang the product from the
suspension point.
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4. Adjust the handle to put the product in a comfortable
work position.
5. Tighten the knob fully.
To set the handlebar in transport
position
1. Loosen the knob.
2. Turn the handlebar clockwise until the throttle handle
touches the battery.
3. Turn the handlebar around the shaft.
4. Tighten the knob.
To assemble the cutting equipment
The cutting equipment includes a cutting attachment and
a cutting attachment guard.
WARNING: Use protective gloves.
WARNING: Always use the cutting
attachment guard that is recommended for
the cutting attachment. See
Accessories on
page 29
.
WARNING: An incorrectly attached
cutting attachment can result in injury or
death.
To attach and remove the guard extension
The guard extension is used on the combination guard.
Attach the guard extension when you use a trimmer
head or plastic blades. Remove the extension guard
when you use a grass blade.
1. Put the guide on the guard extension into the slot on
the combination guard. Click the 4 locking hooks into
position.
2. Release the locking hooks with the spark plug
wrench to remove the guard extension.
To attach the grass blade and the grass blade
guard/combination guard
1. Put the blade guard/combination guard (A) onto the
shaft and tighten the bolt to attach it.
A
2. Make sure that the guard extension is removed.
3. Turn the output shaft to align one of the holes in
the drive disc (B) with the related hole in the gear
housing.
4. Put the locking pin (C) in the hole to lock the shaft.
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11
5. Put the grass blade (D), the support flange (F) and
the support cup (E) on the output shaft.
G
F
D
B
C
A
E
6. Make sure that the drive disc and support flange
engages correctly in the centre hole of the grass
blade.
7. Attach the nut (G).
8. Tighten the nut with the socket wrench. Hold the
shaft of the socket wrench near the blade guard.
Tighten in the opposite direction to how the cutting
attachment rotates. Tighten it to a torque of 35-50
Nm.
To attach the saw blade guard on 545FX AT
and 545FXT AT
• Attach the saw blade guard (A) with the 4 screws (L).
A
L
To attach the saw blade guard
1. Attach the holder (A) and bracket (B) with 2 bolts (C)
on the gear housing (D).
2. Attach the saw blade guard (E) with 4 bolts (F) in the
holder (A).
B
C
D
F
A
E
To attach the saw blade
1. Put the drive disc (A) on the output shaft.
2. Turn the output shaft to align 1 of the holes in the
drive disc with the related hole in the gear housing.
3. Put the locking pin (B) in the hole to lock the shaft.
4. Put the saw blade (C) and the support flange (D) on
the output shaft.
D
E
C
A
B
5. Make sure that the drive disc and support flange
engages correctly in the center hole of the grass
blade.
6. Attach the locknut (E).
12
171 - 011 - 05.06.2023
7. Tighten the locknut with the socket wrench. Hold the
shaft of the socket wrench near the blade guard.
Tighten in the opposite direction to how the cutting
attachment rotates. Tighten it to a torque of 35-50
Nm.
To attach the trimmer guard or combination
guard for trimmer head and plastic blades
1. Hang the trimmer guard/combination guard (A) onto
the two hooks on the plate holder (M).
2. Bend the guard around the shaft and attach it with
the bolt (L) on the opposite side of the shaft.
3. Put the locking pin (C) in the groove on the bolt head
and tighten the bolt fully.
L
A
M
C
To attach a trimmer head or plastic blade
1. Put the drive disc (B) on the output shaft.
2. Align the metal cup (P) with the center of the blade
guide on the drive disc.
3. Turn the output shaft to align one of the holes in the
drive disc with the related hole in the gear housing.
4. Put the locking pin (C) in the hole to lock the shaft.
5. Turn the trimmer head/plastic blades (H)
counterclockwise to attach.
B
H
P
C
To adjust the Balance XT harness
See
Product overview on page 2
for an overview of the
harness.
1. Stop the engine.
2. Push the quick-release mechanism down to release
the product from the harness.
3. To adjust the harness to the operator's height:
a) Press the spring loaded lock.
b) Turn the shoulder strap attachment.
c) Move the shoulder strap attachment to an
applicable hole in the back plate.
4. Attach the strap (A) in correct position for grass
clearing or forestry clearing.
A
5. Tighten the hip strap tightly. Make sure that the hip
strap aligns with the hip bone.
6. Press the 2 parts of the breastplate together as
shown.
7. Attach the side belt to the breastplate.
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13
8. To decrease the pressure on the rib cage and
shoulders, connect the side strap with the strap to
the hip pad. Recommended for women.
9. Tighten the elastic strap (B) to move more load from
the shoulder strap to the hip strap.
B
10. Adjust the shoulder strap to make the product weigh
equally on your shoulders.
11. Adjust the side straps around the rib cage until the
breastplate is aligned with the center of your chest.
12. Adjust the height of the suspension point, see
Product overview on page 2
. For forestry clearing,
the correct height of the suspension is approximately
10 cm below your hip bone.
Operation
Introduction
WARNING: Before you operate the
product, you must read and understand the
safety chapter.
Husqvarna Connect
Husqvarna Connect is a free app for your mobile device.
The Husqvarna Connect app gives extended functions
for your Husqvarna product.
• Extended product information.
• Information about, and help with, product parts and
servicing.
To start to use Husqvarna Connect
1. Download the Husqvarna Connect app on your
mobile device.
2. Register in the Husqvarna Connect app.
3. Follow the instruction steps in the Husqvarna
Connect app to connect and register the product.
Note: Husqvarna Connect app is not available for
download in all markets. Speak to your servicing
dealer for more information.
Before you operate the product
• Examine the work area to make sure that you know
the type of terrain, the slope of the ground and if
14 171 - 011 - 05.06.2023
there are obstacles such as stones, branches and
ditches.
• Do an overhaul inspection of the product.
• Do the safety inspections, maintenance and
servicing that are given in this manual.
• Make sure that all covers, guards, handles and the
cutting equipment are correctly attached and not
damaged.
• Make sure that there are no cracks at the bottom of
the saw blade or grass blade teeth or by the center
hole of the blade. Replace the blade if it is damaged.
• Examine the support flange for cracks. Replace the
support flange if it is damaged.
• Make sure that the locknut can not be removed by
hand. If you can remove it by hand, it does not
lock the cutting attachment sufficiently and you must
replace it.
• Examine the blade guard for damages or cracks.
Replace the blade guard if it has been hit or if it has
cracks.
• Examine the trimmer head and cutting attachment
guard for damages or cracks. Replace the trimmer
head and cutting attachment guard if they have been
hit or if they have cracks.
Fuel
To use fuel
CAUTION: This product has a two-
stroke engine. Use a mixture of gasoline
and two-stroke engine oil. Make sure to use
the correct quantity of oil in the mixture.
Incorrect ratio of gasoline and oil can cause
damage to the engine.
Husqvarna alkylate fuel
CAUTION: Do not use gasoline with an
octane number less than 90 RON (87 AKI).
This can cause damage to the product.
CAUTION: Do not use gasoline with
more than 10% ethanol concentration (E10).
This can cause damage to the product.
CAUTION: Do not use leaded gasoline.
This can cause damage to the product.
We recommend Husqvarna alkylate fuel for best
performance. This fuel gives less dangerous exhaust
fumes compared to regular fuel. It keeps the engine
clean and increases the engine life. Husqvarna alkylate
fuel is not available in all commercial areas.
• Always use new unleaded gasoline with a minimum
octane number of 90 RON (87 AKI) and with less
than 10% ethanol concentration (E10).
• Use gasoline with a higher octane number if you
frequently use the product at continuously high
engine speed.
• Always use a good quality unleaded gasoline/oil
mixture.
Two-stroke engine oil
• Use Husqvarna two-stroke engine oil, which is
specially made for our two-stroke engines. Mixture
1:50 (2%).
171 - 011 - 05.06.2023
15
• If Husqvarna two-stroke engine oil is not available,
use a different high quality two-stroke engine oil. Use
only an air cooled engine oil.
• Do not use two-stroke engine oil made for water-
cooled outboard engines.
• Do not use oil made for four-stroke engines.
Gasoline, l Two-stroke engine oil, l
2% (1:50)
5 0,10
10 0,20
15 0,30
20 0,40
To make the fuel mixture
Note: Always use a clean fuel container when you mix
the fuel.
Note: Do not make more than 30 days quantity of fuel
mixture.
1. Add half of the gasoline quantity.
2. Add the full quantity of oil.
3. Shake the fuel mixture to mix the contents.
4. Add the remaining gasoline quantity.
5. Shake the fuel mixture to mix the contents.
6. Fill the fuel tank.
To add fuel
• Always use a fuel container with an antispill valve.
• If there is some fuel on the container, remove the
unwanted fuel and let the container dry.
• Make sure that the area near the fuel tank cap is
clean.
• Shake the fuel container before you add the fuel
mixture to the fuel tank.
Work position
• Hold the product with 2 hands.
• Hold the product on the right side of your body.
• Keep the cutting attachment below waist level.
• Always keep the product attached to the harness.
• Keep body parts away from the hot surfaces.
• Keep body parts away from the cutting attachment.
Correct balance of the product
For forestry clearing, the product is correctly balanced
when it freely hangs horizontally from the suspension
point. With correct balance, the risk of hitting stones if
you release the handlebar is decreased.
For grass clearing, the product is correctly balanced
when the blade is at cutting height near the ground.
To start the engine
WARNING:
Keep the safety distance of
15 m when the engine starts. There is a risk
that the cutting attachment starts to rotate.
1. Push the air purge bulb until the bulb starts to fill with
fuel.
2. Push the start button.
16
171 - 011 - 05.06.2023
3. Hold the body of the product on the ground with your
left hand. Do not step on the product.
4. Pull the starter rope handle slowly until you feel
some resistance, then pull the starter rope handle
with force.
WARNING: Do not wind the starter
rope around your hand.
5. Continue to pull the starter rope handle until the
engine starts.
CAUTION: Do not pull the starter
rope until it stops. Do not let go of the
starter rope when it is fully extended.
Release the starter rope slowly. Failure
to obey these instructions can cause
damage to the engine.
6. When the engine starts, press the throttle trigger
gradually to increase the engine speed.
7. Make sure that the engine runs smoothly.
WARNING: Keep body parts away
from the muffler. Risk of burn injuries.
To stop the engine
• Move the stop switch to the stop position.
Heated handles
545FXT AT has heating elements in the handles. There
is an ON/OFF switch on the throttle handle. The heating
elements automatically keep a temperature of 70° when
the heat is on.
Blade thrust
A blade thrust is when the product moves to the side
quickly and with force. A blade thrust occurs when the
grass blade or saw blade hits or catches on an object
that cannot be cut. A blade thrust can eject the product
or operator in all directions. There is a risk of injury to
the operator and bystanders.
The risk increases in areas where it is not easy to see
the material that is cut.
Do not cut with the area of the blade that is shown in
black. The speed and movement of the blade can cause
blade thrust. The risk increases with the thickness of the
branch that is cut.
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17
General work instructions
WARNING: Be careful when you cut a
tree that is in tension. It can spring back to
its normal position before or after the cut and
hit you or the product, and cause injury.
• Clear an open space at one end of the work area,
and start the work from there.
• Move in a regular pattern across the work area.
• Move the product fully to the left and right, to clear a
width of 4–5 m on each turn.
• Clear a length of 75 m before you turn and go back.
Move the fuel can along with you as you continue.
• Move in a direction where you do not go across
ditches and obstacles more than necessary.
• Move in a direction where the wind makes the cut
vegetation fall in the cleared area.
• Move along slopes, not up and down.
Forestry clearing with a saw blade
To fell a tree to the left
To fell to the left, push the bottom of the tree to the right.
1. Apply full throttle.
2. Put the saw blade against the tree as given in the
picture.
3. Tilt the saw blade and push it with force diagonally
down to the right. At the same time, push the tree
with the blade guard.
To fell a tree to the right
To fell to the right, push the bottom of the tree to the left.
1. Apply full throttle.
2. Put the saw blade against the tree as given in the
picture.
3. Tilt the saw blade and push it with force diagonally
up and to the right. At the same time, push the tree
with the blade guard.
To fell a tree forward
To fell forward, push the bottom of the tree rearward.
1. Apply full throttle.
2. Put the saw blade against the tree as given in the
picture.
3. Pull the saw blade forward with a fast movement.
To fell large trees
Large trees must be cut from 2 sides.
1. Examine in which direction the tree will fall.
2. Apply full throttle.
18
171 - 011 - 05.06.2023
3. Do the first cut on the side of the tree to which it will
fall.
4. Cut through the tree from the other side.
CAUTION: If the saw blade becomes
blocked, do not pull the product with a
sudden movement. That can cause damage
to the saw blade, bevel gear, shaft or
handlebar. Release the handles, hold the
shaft with 2 hands and carefully pull the
product.
Note: Use more cutting pressure fo fell small trees.
Use less cutting pressure to fell large trees.
Brush cutting with a saw blade
To fell to the left, push the bottom of the tree to the right.
• Cut down thin trees and brush.
• Move the product from side to side.
• Cut many trees in one movement.
• For groups of thin trees:
a) Cut the outer trees high up.
b) Cut the outer trees to the correct height.
c) Cut from the center. If you cannot get access to
the center, cut the outer trees high up and let
them fall. This decreases the risk that the saw
blade becomes blocked.
Grass clearing with a grass blade
CAUTION: Do not use grass blades
and grass knives on wood. Use grass blades
and grass knives for long or heavy grass
only.
• Move the product from side to side.
• Start the movement from right to left when you cut.
Move the product to the right before you cut again.
• Cut with the left side of the grass blade.
• Angle the grass blade to the left to make the grass
fall in a line. This makes it easy to collect the grass.
• Keep a stable position with your feet apart.
• Move forward after each right movement and make
sure that you have a stable position again before you
cut again.
• Keep the support cup with a light pressure against
the ground to make sure that the grass blade does
not hit the ground.
• Obey these instructions to decrease the risk that cut
material winds around the grass blade:
a) Apply full throttle.
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19
b) Do not move the grass blade through cut
material when you move the product from left to
right.
• Before you collect the cut material, stop the engine
and remove the product from the harness. Put the
product down on the ground.
Grass trimming with a trimmer head
To trim the grass
1. Hold the trimmer head immediately above the
ground at an angle. Do not push the trimmer line
into the grass.
2. Decrease the length of the trimmer line by 10-12
cm / 4-4.75 in.
3. Decrease the engine speed to decrease the risk of
damage to plants.
4. Use 80 % throttle when you cut grass near objects.
To clear grass with a grass blade
1. Grass blades and grass cutters must not be used on
woody stems.
2. A grass blade is used for all types of tall or coarse
grass.
3. The grass is cut down with a sideways, swinging
movement, where the movement from right-to-left
is the clearing stoke and the movement from left-to-
right is the return stoke. Let the left-hand side of the
blade (between 8 and 12 o'clock) do the cutting.
4. if the blade is angled to the left when clearing grass,
the grass will collect in a line, which makes it easier
to collect, e.g. by raking.
5. Try to work rhythmically. Stand firmly with your feet
apart. Move forward after the return stoke and stand
firmly again.
6. Let the support cup rest lightly against the ground. It
is used to protect the blade from hitting the ground.
7. Reduce the risk of material wrapping around the
blade by always work at full throttle and avoid the
previously cut material during the return stoke.
8. Stop the engine, unclip the harness and place the
machine on the ground before you start to collect the
cut material.
To cut the grass
1. Make sure that the trimmer line is parallel to the
ground when you cut the grass.
2. Do not push the trimmer head to the ground. This
can cause damage to the product.
3. Move the product from side to side when you cut
grass. Use full speed.
To sweep the grass
The airflow from the rotating trimmer line can be used to
remove cut grass from an area.
1. Hold the trimmer head and the trimmer line parallel
to the ground and above the ground.
2. Apply full throttle.
3. Move the trimmer head from side to side and sweep
the grass.
WARNING:
Clean the trimmer head
cover each time you assemble new trimmer
line to prevent unbalance and vibrations in
the handles. Also do a check of the other
parts of the trimmer head and clean it if
necessary.
20 171 - 011 - 05.06.2023
Maintenance
Introduction
WARNING: Before you do
maintenance, you must read and
understand the safety chapter.
For all servicing and repair work on the product, special
training is necessary. We guarantee the availability of
professional repairs and servicing. If your dealer is not
a service agent, speak to them for information about the
nearest service agent.
For more detailed information, refer to .
Maintenance schedule
Maintenance Daily Weekly Monthly
Clean the external surface. X
Examine the harness for damages. X
Examine the quick-release mechanism release on the harness for damages and
make sure that it operates correctly.
X
Do a check of the throttle trigger lockout and the throttle trigger, see
To do a
check of the throttle trigger lockout on page 7
.
X
Make sure that the cutting attachment does not rotate at idle speed. X
Do a check of the stop switch, see
To do a check of the stop switch on page 7
. X
Examine the cutting attachment guard for damages and cracks. X
Make sure that the saw blade or grass blade is aligned with the center, that it is
sharp and does not have damages by the teeth or the center hole.
X
Examine the support flange for damages and cracks. Replace if damaged. X
Examine the trimmer head for damages and cracks. Replace if damaged. X
Examine the handle and handlebar for damage and make sure that they are
attached correctly.
X
For cutting attachments with a support cup, tighten the locking screw fully. X
For cutting attachments with a locknut, tighten the locknut fully. X
Examine the transport guard for damage and make sure that it can be attached
correctly.
X
Examine the engine, the fuel tank and the fuel lines for leaks. X
Clean the air filter. Replace if necessary. X
Tighten nuts and screws X
Examine the fuel filter for for contamination and the fuel hose for cracks and
other defects. Replace if necessary.
X
Examine all cables and connections. X
Examine the starter and the starter rope for damages. X
Examine the vibration damping elements for damages and cracks.
1
X
Examine the spark plug, see
To examine the spark plug on page 24
. X
1
Replace the vibration damping elements after each season or at a minimum of once a year.
171 - 011 - 05.06.2023 21
Maintenance Daily Weekly Monthly
Clean the cooling system. X
Clean or replace the spark arrester screen. Refer to
To do a check of the muffler
on page 8
.
X
Clean the external surface of the carburetor and the area around it. X
Make sure that the bevel gear is filled to ¾ with grease. X
Lubricate the wire X
Replace the spark plug. X
Lubricate the drive shaft.
2
X
To clean the muffler
WARNING: The muffler gets very hot
during and after operation, also at idle
speed. Risk of fire and burn injuries.
WARNING: A used muffler/spark
arrester and spark arrester mounting
face may contain deposits of combustion
particles on the surfaces that may be
carcinogenic. To avoid skin contact and
inhalation of such particles when cleaning
and/or servicing the spark arrester, make
sure you always:
• wear gloves;
• clean and/or service in a well ventilated
area;
• do not use pressurized air to clean the
spark arrester screen;
• use a steel brush and brush away from
your body when cleaning the spark
arrester.
1. If the muffler on your product has a spark arrester
screen, clean it weekly with a steel brush. Replace
the spark arrester screen if it is damaged.
CAUTION: A blocked spark arrester
screen causes the engine to become too hot
and results in damage to the cylinder and
piston.
CAUTION: If the spark arrester screen
is frequently blocked, let your service agent
examine the muffler.
To clean the cooling system and starter
pawls
The cooling system includes:
• The air intake on the starter (A)
• The fins on the flywheel (B)
• The cooling fins on the cylinder (C)
• The cylinder cover (D)
• The starter pawls (E) that are found on the flywheel
A
B
E
C
D
Clean the cooling system weekly or more frequently if it
is necessary.
1. Remove the starter cover and the cylinder cover.
2. Clean the cooling system with a brush.
3. Examine the starter pawls and area around them for
dirt.
4. Clean around the starter pawls with a brush, to make
sure that they can move freely.
2
At an interval of 3 months.
22 171 - 011 - 05.06.2023
Air filter
A dirty air filter can cause carburetor malfunction, start
problems, loss of engine power and wear to engine
parts. It also makes the engine use more fuel than
necessary. Clean the filter at an interval of 8 hours, or
more frequently if the product is operated in a dusty
environment.
Note: An engine adjustment can be necessary when
the air filter has been cleaned or replaced. See
To
adjust the engine on page 25
.
To do a check of a paper air filter
1. Remove the air filter cover.
2. Open the 2 hooks that hold the filter frame.
3. Remove the filter frame and the air filter.
4. Examine and clean the filter housing with a brush.
5. Examine the filter. Replace the filter if it is dirty or
damaged.
CAUTION:
Do not bend or fold the filter
as this can cause damage to the filter. A
damaged filter must always be replaced.
To clean a nylon air filter
1. Remove the air filter cover.
2. Release the hooks that holds the air filter.
3. Remove the air filter.
4. Examine and clean the filter housing with a brush.
5. Examine the filter. Clean the filter with warm soap
water. Replace the filter if it is damaged.
CAUTION: A damaged filter must
always be replaced.
To change from a paper air filter to a nylon air
filter
Use a nylon air filter when the temperature is below 5°C/
41°F.
1. Remove the air filter cover.
2. Open the 2 hooks that hold the filter frame.
3. Remove the filter frame and the air filter.
4. Examine and clean the filter housing with a brush.
5. Examine the filter. Replace the filter if it is dirty or
damaged.
6. Install the nylon air filter.
7. Close the 2 hooks and make sure that they hold the
filter correctly.
8. Attach the air filter cover.
CAUTION:
Do not bend or fold the filter
as this can cause damage to the filter. A
damaged filter must always be replaced.
To lubricate the bevel gear
1. Remove the cutting equipment.
2. Put the product with the grease plug at its highest
position.
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23
3. Remove the grease plug.
4. Look into the grease plug hole and turn the drive
shaft. The grease level (A) must be in level with the
top of the gear cogs (B).
A B
5. If the grease level is too low fill the bevel gear with
Husqvarna bevel gear grease. Fill slowly and turn
the drive shaft as you apply the bevel gear grease,
stop at the correct level (B).
CAUTION:
An incorrect quantity of
grease can cause damage to the bevel
gear.
6. Install the grease plug.
Drive shaft
Lubricate the drive shaft at an interval of 3 months. Let
a service agent help you if you are not sure about the
procedure.
To attach and remove the locknut
WARNING:
Stop the engine, use
protective gloves and be careful around the
sharp edges of the cutting attachment.
Use the locknut to attach some types of cutting
attachments. The locknut has a left thread.
• Use a socket wrench with a shaft that is sufficiently
long to let you keep your hand behind the cutting
attachment guard. The arrow in the illustration shows
the area where you can safely operate the socket
wrench.
• To attach, tighten the locknut in the opposite
direction to how the cutting attachment rotates.
• To remove the locknut, turn it in the same direction
as how the cutting attachment rotates.
• Keep count when you remove and attach the
locknut. Replace the locknut after approximately 10
times.
Note:
Make sure that you can not turn the locknut by
hand. Replace the locknut if the nylon lining does not
have a resistance of a minimum of 1.5 Nm.
To examine the spark plug
CAUTION:
Always use the
recommended spark plug type. Incorrect
spark plug type can cause damage to the
product.
• Examine the spark plug if the engine is low on
power, is not easy to start or does not operate
correctly at idle speed.
24
171 - 011 - 05.06.2023
• To decrease the risk of unwanted material on the
spark plug electrodes, obey these instructions:
a) Make sure that the idle speed is correctly
adjusted.
b) Make sure that the fuel mixture is correct.
c) Make sure that the air filter is clean.
• If the spark plug is dirty, clean it and make sure that
the electrode gap is correct, refer to
Technical data
on page 28
.
• Replace the spark plug if it is necessary.
To adjust the engine
Follow these instructions if the engine does not operate
correctly.
1. Attach an approved cutting attachment, see
Accessories on page 29
.
2. Start the engine.
3. Operate the product in usual conditions for 3
minutes.
4. Lift the cutting attachment in the air and apply full
throttle for 30 seconds. If a trimmer head is used,
make sure that the trimmer line is cut to correct
length by the guard knife.
Note:
Do not cut grass or branches during this
step.
5. Operate the product in usual conditions to make sure
that the engine operates correctly.
6. If the engine does not operate correctly, do step 4
and 5 again 3 times.
7. Let your Husqvarna dealer adjust/repair the product
if the engine does not operate correctly after you
have done all these steps.
To sharpen the grass knife and grass
blade
WARNING: Stop the engine. Use
protective gloves.
• To sharpen the grass knife or grass blade correctly,
refer to the instructions that come with the cutting
attachment.
• Sharpen all edges equally to keep the balance.
• Use a single-cut flat file.
WARNING: Always discard a blade
that is damaged. Do not try to make a bent
or twisted blade straight and use it again.
To sharpen the saw blade
WARNING: Stop the engine. Use
protective gloves.
• To sharpen the blade correctly, refer to the
instructions that come with the blade.
• Make sure that the product and blade has sufficient
support when you sharpen it.
• Use a 5.5 mm round file with a file holder.
• Hold the file at an angle of 15°.
171 - 011 - 05.06.2023
25
• Sharpen one tooth of the saw blade to the right and
the next tooth to the left, see the illustration.
15˚
Note: Sharpen the edges of the teeth with a flat
file if the blade is heavily worn. Continue to sharpen
with a round file.
• Sharpen all edges equally to keep the blade
balanced.
• Adjust the blade set to 1 mm with the recommended
setting tool. Refer to the instructions that come with
the blade.
WARNING: Always discard a blade
that is damaged. Do not try to make a bent
or twisted blade straight and use it again.
To adjust the product for cold
environments
If the temperature is 5° or colder, adjustments are
necessary to prevent operation problems.
• Attach the air duct as shown in the illustration. Make
sure that the arrow points in the direction of the
winter mode symbol.
• Replace the air filter cover with the winter mode air
filter cover.
• If you operate the product in snow, attach a cover on
top of the starter.
• Replace the air paper filter with a nylon air filter that
is approved for operation in winter conditions. Refer
to,
To change from a paper air filter to a nylon air
filter on page 23
.
• For 545FXT AT, make sure that the wire is lubricated
when you operate the product in cold environments.
• At temperatures of more than 5°, change back to
the regular air filter cover. Remove the cover on top
of the starter and adjust the air duct back to the
initial position. Make sure that the arrow points in the
direction of the summer mode symbol.
CAUTION: Do not operate the product
at temperatures of more than than 5° if it
is adjusted for winter mode. The engine
becomes too hot and can be damaged.
To lubricate the wire
545FXT AT
Note:
The wire is lubricated at the factory. Lubricate
the wire monthly.
1. Remove the protective cover.
2. Remove the cylinder cover to get access to the
rubber bellows on the wire.
3. Remove the plug on the grease nipple.
4. Use antifreeze spray with a 2 mm spray tube. Spray
in short intervals.
5. Examine the rubber bellows on the wire to make
sure that it does not expand.
6. Attach the cylinder cover and the protective cover.
26
171 - 011 - 05.06.2023
Troubleshooting
The engine does not start
Check Possible cause Procedure
Stop switch. The stop switch is in the stop posi-
tion.
Let an approved service agent re-
place the stop switch.
Starter pawls. The starter pawls cannot move free-
ly.
Remove the starter cover and clean
around the starter pawls. See
To
clean the cooling system and starter
pawls on page 22
.
Let an approved service agent help
you.
Fuel tank. Incorrect fuel type. Drain the fuel tank and fill with cor-
rect fuel.
Spark plug. The spark plug is dirty or wet. Make sure that the spark plug is dry
and clean.
The spark plug electrode gap is in-
correct.
Clean the spark plug. Make sure that
the electrode gap is correct. Make
sure that the spark plug has a su-
pressor.
Refer to technical data for correct
electrode gap.
The spark plug is loose. Tighten the spark plug.
The engine starts but stops again
Check
Possible cause Procedure
Fuel tank Incorrect fuel type. Empty the fuel tank and fill it with correct fuel.
Air filter The air filter is clogged. Clean the air filter.
Transportation, storage and disposal
Transportation and storage
• Let the product cool before transportation or storage.
• Remove the spark plug cap before long-term
storage.
• Attach the product during transportation. Make sure
that it cannot move.
• Make sure that there is no risk of fuel leaks, fuel
fumes, sparks or flames during transportation and
storage.
• Attach the transport guard during transportation and
storage.
• Clean and do servicing on the product before long-
term storage.
Disposal
• Obey the local recycling requirements and applicable
regulations.
• Discard all chemicals, such as oil or fuel, at a service
center or at an applicable disposal location.
171 - 011 - 05.06.2023 27
• When the product is no longer in use, send it to
a Husqvarna dealer or discard it at a recycling
location.
Technical data
Technical data
545RXT AT 545FX AT 545FXT AT
Engine
Cylinder displacement, cm
3
45.7 45.7 45.7
Cylinder bore, mm 42 42 42
Stroke, mm 33 33 33
Idle speed, rpm 2700 2700 2700
Speed of output shaft, rpm 8800 9700 9700
Max. engine output, according to ISO 8893,
kW/rpm
2.2/9000 2.2/9000 2.2/9000
Ignition system
Spark plug NGK CMR6H NGK CMR6H NGK CMR6H
Electrode gap, mm 0.5 0.5 0.5
Fuel
Fuel tank capacity, litre/cm
3
1.0/1000 1.0/1000 1.0/1000
Weight
Without fuel, cutting attachment and guard,
kg
8.6 8.2 8.4
Noise emissions
3
Sound power level, measured dB (A) 115 115 115
Sound power level, guaranteed L
WA
dB (A) 116 116 116
Sound levels
4
Equivalent sound pressure level at the operator’s ear, measured according to EN ISO 11806 and ISO 22868, dB(A):
Equipped with trimmer head (original) 102 102 102
Equipped with grass blade (original) 101 101 101
Equipped with saw blade (original) – 99 99
Vibration levels
5
3
Noise emissions in the environment measured as sound power (L
WA
) in conformity with EC directive
2000/14/EC. Reported sound power level for the machine has been measured with the original cutting
attachment that gives the highest level. The difference between guaranteed and measured sound power
is that the guaranteed sound power also includes dispersion in the measurement result and the variations
between different machines of the same model according to Directive 2000/14/EC.
4
Reported data for noise pressure level has a typical statistical dispersion (standard deviation) of 1.2 dB (A).
5
Reported data for vibration level has a typical statistical dispersion (standard deviation) of 0.2 m/s
2
.
28 171 - 011 - 05.06.2023
545RXT AT 545FX AT 545FXT AT
Equivalent vibration levels (a
hv,eq
) at handles, measured according to EN ISO 11806 and ISO 22867, m/s
2
:
Equipped with trimmer head (original), left/
right
3.2/3.2
Equipped with grass blade (original), left/right 3.3/3.5
Equipped with saw blade (original), left/right – 2.9/3.3 3.5/3.2
Accessories
Accessories 545RXT AT
Approved accessories
Accessory type Cutting attachment guard, art. no.
Centre hole in blades/knives, Ø 25.4
mm
Output shaft thread M12
Grass blade/grass knife Multi 255-3 (Ø 255, 3 teeth) 537 28 85 / 544 46 43
Multi 275-4 (Ø 275, 4 teeth) 537 28 85 / 544 46 43
Multi 300-3 (Ø 300 3 teeth) 537 28 85 / 544 46 43
Saw blade Maxi XS 200-26 (Ø 200, 26 teeth) 537 31 09
Scarlet 200-22 (Ø 200, 22 teeth) 537 31 09
Plastic blades Tricut Ø 300 mm (Separate blades
have part number 531 01 77-15)
537 28 85 / 544 46 43
Trimmer head T55x (Ø 2.7–3.3 mm cord) 503 95 43 / 544 46 43
Trimmy S II (Ø 2.4–3.3 mm cord) 503 95 43 / 544 46 43
T45x (Ø 2.7–3.3 mm cord) 503 95 43 / 544 46 43
Support cup Fixed
Accessories for 545FX AT, 545FXT AT
Approved accessories
Accessory type Cutting attachment guard, art. no.
Centre hole in blades/knives, Ø 25.4
mm
Output shaft thread M12
Grass blade/grass knife Multi 255-3 (Ø 255, 3 teeth) 537 29 74 / 544 46 43
Multi 275-4 (Ø 275, 4 teeth) 537 29 74 / 544 46 43
Multi 300-3 (Ø 300 3 teeth) 537 29 74 / 544 46 43
171 - 011 - 05.06.2023 29
Approved accessories Accessory type Cutting attachment guard, art. no.
Saw blade Maxi 200-26 (Ø 200, 26 teeth) 574 53 26
Scarlet 200-22 (Ø 200, 22 teeth) 574 53 26
Scarlet 225-24 (Ø 225, 24 teeth) 574 50 67
Maxi 225-24T BACHO (Ø 225, 24
teeth)
574 50 67
Plastic blades Tricut Ø 300 mm (Separate blades
have part number 531 01 77-15)
537 29 74 / 544 46 43
Trimmer head Trimmy S II (Ø 2.4–3.3 mm cord) 537 29 73 / 544 46 43
Auto 55 (Ø 2.7-3.3 mm cord) 537 29 73 / 544 46 43
T45x (Ø 2.7–3.3 mm cord) 537 29 73 / 544 46 43
T55x (Ø 2.7–3.3 mm cord) 537 29 73 / 544 46 43
Support cup Fixed
Registered trademarks
The
Bluetooth
®
word mark and logos are registered
trademarks owned by
Bluetooth SIG, inc.
and any use
of such marks by Husqvarna is under license.
30 171 - 011 - 05.06.2023
Declaration of Conformity
EU Declaration of conformity
We, Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel:
+46-36-146500, declare on our sole responsibility that
the product:
Description Brush cutters
Brand Husqvarna
Type / Model 545RXT AutoTune
®
, 545FX AutoTune
®
, 545FXT AutoTune
®
Identification Serial numbers dating from 2020 and onwards
complies fully with the following EU directives and
regulations:
Regulation Description
2006/42/EC "relating to machinery"
2014/30/EU "relating to electromagnetic compatibility"
2000/14/EC "relating to the noise emissions in the environment"
2011/65/EU
“on the restriction of the use of certain hazardous substances in electrical and electronic
equipment ”
and that the following standards and/or technical
specifications are applied: EN ISO 12100:2010, EN ISO
11806-1:2011, ISO 14982:2009, EN IEC 63000:2018EN
ISO 12100:2010, EN ISO 14982:2009, EN IEC
63000:2018, EN ISO 11806-1:2011
RISE SMP Svensk Maskinprovning AB, Box 7035,
SE-750 07 Uppsala, Sweden has performed voluntary
type examination on behalf of Husqvarna AB.
Certificate Number: SEC/16/2458
RISE SMP Svensk Maskinprovning AB, Box 7035,
SE-750 07 Uppsala, Sweden, has also verified
agreement with appendix V of the council's directive
2000/14/EG.
For information relating to noise emissions, refer to
Technical data on page 28
.
Huskvarna, 2022-04-11
Stefan Holmberg, R&D Director, Technology
Management, Husqvarna AB
Responsible for technical documentation
171 - 011 - 05.06.2023 31
UK Declaration of conformity
We, Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel:
+46-36-146500, declare on our sole responsibility that
the product:
Description Brush cutters
Brand Husqvarna
Type / Model 545RXT AutoTune
®
, 545FX AutoTune
®
, 545FXT AutoTune
®
Identification Serial numbers dating from 2022 and onwards
complies fully with the following UK regulations:
Description
The Supply of Machinery (Safety) Regulations 2008
Electromagnetic Compatibility Regulations 2016
The Noise Emission in the Environment by Equipment for use Outdoors Regulations 2001, Schedule 8
The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations
2012
and that the following standards and/or technical
specifications are applied: EN ISO 12100:2010, EN ISO
11806-1:2011, ISO 14982:2009, EN IEC 63000:2018
For information relating to noise emissions, refer to
Technical data on page 28
.
Huskvarna, 2022-04-11
Stefan Holmberg, R&D Director, Technology
Management, Husqvarna AB
Responsible for technical documentation
UK Importer:
Husqvarna UK Ltd
Preston Road, Co. Durham
DL5 6UP
32 171 - 011 - 05.06.2023
1
3
8
7
4 5
2
Tri Cut
171 - 011 - 05.06.2023 33
1
2
3
4
5
6
7
8
9
35-50 NM
~ 15 cm
6'
"Click"
~ 3,5 m
11'
7,0 m
23'
2,4-3,3 mm
.095"-.130"
12 cm
5"
Trimmy SII
34 171 - 011 - 05.06.2023
Trimmy SII
1 2 3
4
171 - 011 - 05.06.2023 35
A
2,7 - 4,0 mm / .105 - .160"
B
8 m / 26’
C
15 cm / 5.9"
1
2
3
5
6
7
9
4
8
6"
15 cm
B
C
A
T55x
"Click"
36 171 - 011 - 05.06.2023
"Click"
1
2
3
5
6
7
9
10 m
32'
4
8
4,3 m
14'
2,7-3,3 mm
.106-.13"
10 cm
4"
6"
15 cm
T45, T45x
171 - 011 - 05.06.2023 37
38 171 - 011 - 05.06.2023
171 - 011 - 05.06.2023 39
www.husqvarna.com
Original instructions
1143110-26
2023-06-15
