Husqvarna 345FR User manual

EE
EEnn nngg ggll llii iiss sshh hh
345FR 545FX 545FXT
545RX 545RXT
Oper ator’s manual
Please r ead the operator’s manual carefully and make sure you understand the instructions
before using the machine.

KEY T O SYMBOLS
2 – English
Symbols
W ARNING! Clearing saws,
brushcutters and trimmers can be
dangerous! Careless or incorrect
use can result in serious or fatal
injury to the operator or others. It is
extremely important that you read
and understand the contents of the
operator’s manual.
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
• Approved hearing protection
• Approved eye protection
Max. speed of output shaft, rpm
Watch out for thrown objects and
ricochets.
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.This is
called blade thrust. The blade is
capable of amputating an arm or leg.
Always keep people and animals at least 15 metres from
the machine.
Always wear approved protective
gloves.
Wear sturdy, non-slip boots.
Decompression v alve: The valve is to
reduce the pressure in the cylinder and
make starting easier. You should always
use the decompression valve when
starting the machine.
Air purge.
Ignition; choke: Set the choke control in
the choke position.
Heated handles
Only use non-metallic, flexible cutting
attachments, i.e. trimmer heads with
trimmer cord.
Other symbols/decals on the mac hine
refer to special certification
requirements for certain markets.
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.
50FT
15 m
50FT
15 m
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.

CONTENTS
English – 3
Contents
Note the f ollowing before
starting:
Please read the oper ator’s manual carefully.
Maintenance, replacement, or repair of the emission
control devices and system may be performed by any
nonroad engine repair establishment or individual.
The Emissions Compliance Period referred to on the
Emission Compliance label indicates the number of
operating hours for which the engine has been shown to
meet Federal emissions requirements.
KEY TO SYMBOLS
Symbols ................................................................ 2
CONTENTS
Contents ............................................................... 3
Note the following before starting: ........................ 3
INTR ODUCTION
Dear customer! ..................................................... 4
WHA T IS WHAT?
What is what on the br ush cutter? ........................ 5
What is what on the brush cutter? ........................ 6
What is what on the brush cutter? ........................ 7
GENERAL SAFETY PRECA UTIONS
Impor tant .............................................................. 8
Personal protective equipment ............................. 8
Machine ′ s safety equipment ................................. 9
Cutting equipment ................................................ 12
ASSEMBL Y
Assemb ling the handlebar and throttle ................. 15
Transport position, handlebar ............................... 15
Assembling the cutting equipment ....................... 15
Fitting the blade guard/combination guard, grass
blade and ball-bearing-mounted support cup ....... 16
Fitting the blade guard and saw blade .................. 16
Fitting the trimmer guard and trimmer head Trimmy
SII ......................................................................... 17
Fitting other guards and cutting attachments ....... 18
Adjusting the harness and brush cutter ................ 18
Balance X ............................................................. 18
Balance XT ........................................................... 19
FUEL HANDLING
Fuel saf ety ............................................................ 21
Fuel ...................................................................... 21
Fueling .................................................................. 22
ST ARTING AND STOPPING
Chec k before starting ........................................... 23
Starting and stopping ........................................... 23
W ORKING TECHNIQUES
Gener al working instructions ................................ 25
MAINTENANCE
Carb uretor ............................................................ 29
Muffler .................................................................. 30
Cooling system ..................................................... 30
Air filter ................................................................. 30
Bevel gear ............................................................ 31
Drive shaft ............................................................ 31
Spark plug ............................................................ 31
Winter use ............................................................ 31
Maintenance schedule ......................................... 33
TECHNICAL D ATA
T echnical data ....................................................... 34
FEDERAL EMISSION CONTR OL WARRANTY
STATEMENT
Y OUR WARRANTY RIGHTS AND OBLIGATIONS 38
!
W ARNING! Long-term exposure to noise
can result in permanent hearing
impairment. So always use approved
hearing protection.
!
W ARNING! 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.
!
W ARNING! 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.

4 – English
INTR ODUCTION
Dear customer!
Cong ratulations on your choice to buy a Husqvarna product! Husqvarna is based on a tradition that dates back to 1689,
when the Swedish King Karl XI ordered the construction of a factory on the banks of the Huskvarna River, for production
of muskets. The location was logical, since water power was harnessed from the Huskvarna River to create the water-
powered plant. During over 300 years of continuous operation, the Husqvarna factory has produced a lot of different
products, from wood stoves to modern kitchen appliances, sewing machines, bicycles, motorcycles etc. In 1956, the first
motor driven lawn mowers appeared, followed by chain saws in 1959, and it is within this area Husqvarna is working
today.
Today Husqvarna is one of the leading manufacturers in the world of forest and garden products, with quality as our
highest priority. We develop, manufacture and market high quality motor driven products for forestry and gardening as
well as for building and construction industry.
Your purchase gives you access to professional help with repairs and service whenever this may be necessary. If the
retailer who sells your machine is not one of our authorized dealers, ask for the address of your nearest servicing dealer.
It is our wish that you will be satisfied with your product and that it will be your companion for a long time. Think of this
operator
′ s manual as a valuable document. By following its ′ content (using, service, maintenance etc) the life span and
the second-hand value of the machine can be extended. If you ever lend or sell this machine, make sure that the
borrower or buyer gets the operator
′ s manual, so they will also know how to properly maintain and use it.
Thank you for using a Husqvarna product.
Husqvarna AB has a policy of continuous product development and therefore reserves the right to modify the design and
appearance of products without prior notice.
For customer assistance, contact us at our website: www.husqvarna.com

English – 5
WHA T IS WHA T?
What is what on the brush cutter? (545 RX, 545 RXT)
26
27 28
30
25
6
3
2
517
13 11
10
14
16
15
4
22
24
34
9
32
8
7
33
18
20
19
21 4
1
31
21
29
34
12
23
35
1 Grass blade
2 Grease filler cap, bevel gear
3 Bevel gear
4 Cutting attachment guard
5 Shaft
6 Handlebar
7 Throttle trigger
8 Stop switch
9 Throttle lockout
10 Support eyes for harness
11 Cylinder cover
12 Starter handle
13 Fuel tank
14 Choke control
15 Air purge
16 Air filter cover
17 Handle adjustment
18 Locking screw
19 Support cup
20 Support flange
21 Drive disc
22 Trimmer head
23 Spark plug cap and spark plug
24 Socket spanner
25 Operator’s manual
26 Transport guard
27 Allen key
28 Carburettor screwdriver
29 Locking pin
30 Harness
31 Locking nut
32 Start throttle button
33 Adjusting the throttle wire
34 Metal cup
35 Decompression valve

6 – English
WHA T IS WHA T?
What is what on the brush cutter? (545 FX, 545 FXT)
24
27
25 26
23
6
3
2
5
10
9
8
7
17
29
22
18
1
420
18
19
28
11
14
16
15
12
21
13
30
1 Saw blade
2 Grease filler cap, bevel gear
3 Bevel gear
4 Cutting attachment guard
5 Shaft
6 Handlebar
7 Throttle trigger
8 Stop switch
9 Throttle lockout
10 Support eyes for harness
11 Cylinder cover
12 Starter handle
13 Fuel tank
14 Choke control
15 Air purge
16 Air filter cover
17 Handle adjustment
18 Locking nut
19 Support flange
20 Drive disc
21 Spark plug
22 Socket spanner
23 Operator’s manual
24 Transport guard
25 Allen key
26 Carburettor screwdriver
27 Locking pin
28 Harness
29 Switch for heated handle (545 FXT)
30 Decompression valve

English – 7
WHA T IS WHA T?
What is what on the brush cutter? (345 FR)
26
27 28
30
32
31
34
9
33
8
7
29
24
21
23
20 4
1
22
4
25
20
22
1
4
20
19
21
6
3
2
5
10
17
19
11
14
16
15
12
18
13
35
1 Blade
2 Grease filler cap, bevel gear
3 Bevel gear
4 Cutting attachment guard
5 Shaft
6 Handlebar
7 Throttle trigger
8 Stop switch
9 Throttle lockout
10 Support eyes for harness
11 Cylinder cover
12 Starter handle
13 Fuel tank
14 Choke control
15 Air purge
16 Air filter cover
17 Handle adjustment
18 Spark plug cap and spark plug
19 Locking nut
20 Drive disc
21 Support flange
22 Metal cup
23 Support cup
24 Locking screw
25 Trimmer head
26 Transport guard
27 Allen key
28 Carburettor screwdriver
29 Locking pin
30 Harness
31 Socket spanner
32 Operator’s manual
33 Start throttle button
34 Adjusting the throttle wire
35 Decompression valve

GENERAL SAFETY PRECA UTIONS
8 – English
Impor tant Personal protective equipment
HELMET
A helmet should be w orn if the trees being cleared are
taller than 2 m.
HEARING PROTECTION
Wear hearing protection that provides adequate noise
reduction.
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.
GLOVES
Gloves should be worn when necessary, e.g., when fitting
cutting attachments.
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.
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, guards and handles must be fitted before
starting. Ensure that the spark plug cap and ignition
lead are undamaged to avoid the risk of 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.
Do an overall inspection of the machine before use, see
maintenance schedule.
!
W ARNING! This machine 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 machine.
!
W ARNING! Running an engine in a
confined or badly ventilated area can
result in death due to asphyxiation or
carbon monoxide poisoning.
IMPOR TANT!
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.
You must use approved personal protective equipment
whenever you use the machine. Personal protective
equipment cannot eliminate the risk of injury but it will
reduce the degree of injury if an accident does happen.
Ask your dealer for help in choosing the right equipment.
!
W ARNING! Listen out for warning signals
or shouts when you are wearing hearing
protection. Always remove your hearing
protection as soon as the engine stops.

GENERAL SAFETY PRECA UTIONS
English – 9
BOO TS
Wear boots with steel toe-caps and non-slip sole.
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.
Mac hine ′ s safety equipment
This section descr ibes 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 servicing dealer.
Thr ottle lockout
The throttle loc kout 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 lockout 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.
Make sure the throttle control is locked at the idle setting
when the throttle lockout is released.
Press the throttle lockout and make sure it returns to its
original position when you release it.
Check that the throttle trigger and throttle lockout move
freely and that the return springs work properly.
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
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.
!
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.

GENERAL SAFETY PRECAUTIONS
10 – English
be checked. See instructions under the heading
Maintenance.
Stop switch
Use the stop switch to switch off the engine.
Start the engine and make sure the engine stops when
you move the stop switch to the stop setting.
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.
Check that the guard is undamaged and 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.
Vibration damping system
Your machine is equipped with a vibration damping
system that is designed to reduce vibration and make
operation easier.
Use of incorrectly wound cord or an incorrect cutting
attachment increases the level of vibration. See
instructions under the heading Cutting equipment.
The machine′s vibration damping system reduces the
transfer of vibration between the engine unit/cutting
equipment and the machine′s handle unit.
Regularly check the vibration damping units for cracks or
deformation. Check that the vibration damping element is
undamaged and securely attached.
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 brush
!
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.
!
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.

GENERAL SAFETY PRECAUTIONS
English – 11
cutter. Certain harnesses also have a quick release fitted
to the support hook.
Check that the harness straps are correctly positioned.
Once the harness and machine have been adjusted,
check that the harness quick release works correctly.
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.
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 screen. Check whether the muffler on
your machine is fitted with this kind of screen.
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.
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 screen this must be cleaned regularly. A blocked
screen will cause the engine to overheat and may lead to
serious damage.
Locking nut
A locking nut is used to secure some types of cutting
attachment.
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.) When loosening and tightening the saw blade
nut, there is a risk of injury from the teeth of the saw blade.
You should therefore always ensure that your hand is
shielded by the blade guard when doing this. Always use
a socket spanner with a shaft that is long enough to allow
this. The arrow in the diagram shows the area where you
!
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 the muffler
contain chemicals that may be
carcinogenic. Avoid contact with these
elements in the event of a damaged
muffler.
!
WARNING! Bear in mind that:
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!

GENERAL SAFETY PRECAUTIONS
12 – English
should operate the socket spanner when loosening or
tightening the nut.
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.
Locking screw
The lock screw must be tightened securely for ball-
bearing-mounted support cups.
Cutting equipment
This section describes how to choose and maintain your
cutting equipment in order to:
• Reduce the risk of blade thrust.
• Obtain maximum cutting performance.
• Extend the life of cutting equipment.
Cutting equipment
Saw blades are intended for cutting fibrous types of wood.
Grass blades and grass knifes are intended for cutting
coarse grass.
Shredder blades are intended for cutting coarse grass
and bushes.
A trimmer head is intended for trimming grass.
General rules
Only use cutting attachments with the guards we
recommend! See the chapter on Technical data.
Keep the teeth of the blade correctly sharpened! Follow
our instructions and use the recommended file gauge. An
IMPORTANT!
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.
!
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.
!
WARNING! Using an incorrect cutting
attachment or an incorrectly sharpened
blade increases the risk of blade thrust.

GENERAL SAFETY PRECAUTIONS
English – 13
incorrectly sharpened or damaged blade increases the
risk of accidents.
Keep the correct setting on the saw blade! Follow our
instructions and use the recommended setting tool. An
incorrectly set saw blade increases the risk of jamming
and blade thrust, and damage to the saw blade.
Check the cutting attachment for damage or cracks. A
damaged cutting attachment should always be replaced.
Sharpening grass knifes 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.
Sharpening the saw blade
• See the cutting attachment packaging for correct
sharpening instructions.
A correctly sharpened blade is essential for working
efficiently and to avoid unnecessary wear to the blade and
brush cutter.
• 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.
Adjust the blade setting. This should be 1 mm.
!
WARNING! Always discard a blade that is
bent, twisted, cracked, broken or
damaged in any other way. Never attempt
to straighten a twisted blade so that it
can be reused. Only use original blades
of the specified type.

GENERAL SAFETY PRECAUTIONS
14 – English
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.

ASSEMBLY
English – 15
Assembling the handlebar and
throttle
CAUTION! Some models have the throttle handle fitted at
the factory.
• Remove the screw at the rear of the throttle handle.
• Slide the throttle handle onto the right side of the
handlebar, (see diagram).
• Align the screw hole in the throttle handle with the hole
in the handlebar.
• Refit the screw in the hole in the rear of the throttle
handle.
• Screw the screw through the handle and handlebar.
Tighten it.
• Unscrew the knob from the handlebar mounting.
• Position the handlebar as shown. Fit the mounting
components and tighten the knob lightly.
• Put on the harness and hang the machine from the
support hook. Now make a final adjustment so that
the machine is in a comfortable working position when
it hangs from the harness.
• Tighten the knob.
Transport position, handlebar
• The handlebar can easily be turned to fit along the
shaft for easier transportation and storage.
• Loosen the knob.Turn the handlebar clockwise so that
the throttle handle rests against the engine.
• Now twist the handlebar around the shaft.Tighten the
knob.
• Fit the transport guard to the cutting attachment.
Assembling the cutting
equipment
345 FR
545 FX, 545 FXT
545 RX, 545 RXT
!
WARNING!
When fitting the cutting attachment it is
extremely important that the raised
section on the drive disc/support flange
engages correctly in the centre hole of
the cutting attachment. If the cutting
attachment is fitted incorrectly it can
result in serious and/or fatal personal
injury.
!
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.
IMPORTANT! If a saw blade or grass blade are to be
used the machine must be equipped with the correct
handlebar, blade guard and harness.

ASSEMBLY
16 – English
Fitting the blade guard/
combination guard, grass blade
and ball-bearing-mounted
support cup
•Hang the trimmer guard/combination guard (A) on the
two hooks on the plate holder (M). Bend the guard
around the shaft and tighten it with the bolt (L) on the
opposite side of the shaft. Use the locking pin (C).
Place the locking pin in the groove on the screw head
and tighten. See diagram.
CAUTION! Always use the recommended guard for the
cutting attachment you are using. See chapter on
Technical data.
• Fit the drive disc (B) on the angle gear’s output shaft.
• Centre the metal cup (P) on the drive disc’s blade
guide.
• Turn the output shaft until one of the holes in the drive
disk aligns with the corresponding hole in the gear
housing.
• Insert the locking pin (C) in the hole to lock the shaft.
• Position the blade (D) with the drive disk (B). Make
sure that the blade is centered by fitting it to the guide
on the drive disk.
• Fit the support flange (F) on the output shaft so that it
rests against the blade.
• Screw the support cup (E) onto the output shaft
threads (CAUTION! Left-hand thread). Tighten to a
torque of 35-50 Nm (3.5-5.0 kpm). Use the socket
spanner in the tool kit. Note that the locking pin (C)
must remain inside the gear housing to lock the drive
disk. Hold the shaft of the socket spanner as close to
the blade guard/combination guard as possible.
Fitting the blade guard and saw
blade
CAUTION! Always use the recommended guard for the
cutting attachment you are using. See chapter on
Technical data.
545 FX, 545 FXT
• The blade guard (A) is fitted using 4 screws (L) as
shown.
345 FR, 545 RX, 545 RXT
• Fit the holder (R) and bracket (J) with 2 bolts (H) on
the gear housing.
L
A
M
C
E
N
F
D
B
C
A
ML
P
!
WARNING! Tighten the lock screw (N) in
the center hole of the support cup.
Tighten to a torque of 35-50 Nm (3.5-5.0
kpm), CAUTION! Left-hand thread. If the
lock screw is not fitted in the support
cup, there is a risk that the support cup
will come unscrewed. This means that
the blade will also come loose, which
could result in serious or fatal injury to
the operator or others.
A
L

ASSEMBLY
English – 17
•Then fasten the blade guard (A) with 4 bolts (L) in the
holder (N).
• Fit the drive disc (B) on the output shaft.
• Turn the blade shaft until one of the holes in the drive
disc aligns with the corresponding hole in the gear
housing.
• Insert the locking pin (C) in the hole to lock the shaft.
• Place the blade (D) and support flange (F) on the
output shaft.
• Fit the nut (G). The nut must be tightened to a torque
of 35-50 Nm (3.5-5 kpm). Use the socket spanner in
the tool kit. Hold the shaft of the spanner as close to
the blade guard as possible. To tighten the nut, turn
the spanner in the opposite direction to the direction
of rotation (Caution! left-hand thread).
When loosening and tightening the saw blade nut, there
is a risk of injury from the teeth of the saw blade. You
should therefore always ensure that your hand is shielded
by the blade guard when doing this. Always use a socket
spanner with a shaft that is long enough to allow this. The
arrow in the diagram shows the area where you should
operate the socket spanner when loosening or tightening
the nut.
Fitting the trimmer guard and
trimmer head Trimmy SII
• Fit the correct trimmer guard (A) for use with the
trimmer head. Hang the trimmer guard/combination
guard (A) on the two hooks on the plate holder (M).
Bend the guard around the shaft and tighten it with the
bolt (L) on the opposite side of the shaft. Use the
locking pin (C). Place the locking pin in the groove on
the screw head and tighten. See diagram.
• Fit the drive disc (B) on the output shaft.
• Centre the metal cup (P) on the drive disc’s blade
guide.
• Turn the blade shaft until one of the holes in the drive
disc aligns with the corresponding hole in the gear
housing.
• Insert the locking pin (C) in the hole to lock the shaft.
H
J
K
L
R
A
F
G
D
B
C
L
A
M
C
B
H
P
C

ASSEMBLY
18 – English
• Screw on the trimmer head (H) in the opposite
direction to the direction of rotation.
• Tighten the trimmer head to a torque of 35-50 Nm
(3.5-5 kpm).
• To dismantle, follow the instructions in the reverse
order.
Fitting other guards and cutting
attachments
•Fit the trimmer guard/combination guard (A) intended
for use with the trimmer head/plastic blades. Hang the
trimmer guard/combination guard (A) on the two
hooks on the plate holder (M). Bend the guard around
the shaft and tighten it with the bolt (L) on the opposite
side of the shaft. Use the locking pin (C). Place the
locking pin in the groove on the screw head and
tighten. See diagram.
• Fit the drive disc (B) on the output shaft.
• Centre the metal cup (P) on the drive disc’s blade
guide.
• Turn the blade shaft until one of the holes in the drive
disc aligns with the corresponding hole in the gear
housing.
• Insert the locking pin (C) in the hole to lock the shaft.
• Screw on the trimmer head/plastic blades (H) in the
opposite direction to the direction of rotation.
• To dismantle, follow the instructions in the reverse
order.
Adjusting the harness and brush
cutter
Balance X
(345 FR, 545 RX)
Safety release
Push down the red release lever to release the machine
from the harness.
Adjusting the harness
1 Tighten the hip strap so that it sits securely.
2 Tighten the chest strap under your left arm so that it
fits closely around your body.
H
C
L
A
M
C
B
H
P
C
!
WARNING! When using a brush cutter it
must always be hooked securely to the
harness. Otherwise you will be unable to
control the brush cutter safely and this
can result in injury to yourself or others.
Never use a harness with a defective
quick release.

ASSEMBLY
English – 19
3Adjust the shoulder strap to distribute the load evenly
across your shoulders. Press downwards on the
suspension hook to load the harness.
4 Adjust the height of the suspension hook as described
in the instructions for the standard harness. (Forestry
clearing)
5 If you need to lower the suspension hook, for trimming
for example, move the suspension strap (A) to the
lower mounting point on the backplate.
6 The elastic strap (B) can be tightened to transfer more
load from the shoulder straps to the hip strap.
Balance XT
(545FX, 545FXT, 545RXT)
Safety release
Push down the red release lever to release the machine
from the harness.
Adjusting the harness
1 Adjust the harness to suit the person's height. Move
the shoulder strap attachment to a suitable hole in the
back plate by pressing in the spring-loaded lock and
twisting the shoulder strap attachment.
A
B

ASSEMBLY
20 – English
2 Tighten the hip strap so that it sits securely.
3 The hip belt should hang roughly in line with the hip
bone.
4 Press the breast plate together.
5 Attach the side belt to the breast plate.
6 To relieve pressure on the rib cage, it is possible to
connect the side belt with a belt to the hip pad.
(Suitable for females).
7 Adjust the shoulder strap to distribute the load evenly
across your shoulders. Press downwards on the
suspension hook to load the harness.
8 Adjust the side belts to fit around the rib cage until the
breast plate is centred on the chest.
Adjust the height of the hanging ring as per the
instructions. (For forest clearing, the suspension should
hang approx. 10 cm below your hip bone.)
9 If you need to lower the suspension hook, for trimming
for example, move the suspension strap (A) to the
lower mounting point on the backplate. The front belt
that is attached to the breast plate can also be
adjusted if necessary.
10 The elastic strap (B) can be tightened to transfer more
load from the shoulder straps to the hip strap.
Correct balance
1Forestry clearing
The machine is balanced by moving the suspension
ring on the machine forwards or backwards. On some
models the suspension ring is fixed, however, this will
then have a number of holes for the support hook. The
machine is correctly balanced when it freely hangs
horizontally from the support hook. In this way the risk
of hitting stones is reduced if you need to release the
handlebar.
2Grass clearing
Let the blade balance at a comfortable cutting height,
i.e. close to the ground.