Husqvarna 525RX, 525RK, 525RXT User Manual
Oper ator ′ s manual
525RX 525RXT 525RK
Please r ead the operator’s manual carefully and make sure you understand the instructions
before using the machine.
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KEY T O SYMBOLS
Symbols
WARNING! Clearing saws,
brushcutters and trimmers can be
dangerous! Careless or incorrect use
can result in serious or fatal injury to
the operator or others.
Please read the operator’s manual
carefully and make sure you
understand the instructions before
using the machine.
Always wear:
• A protective helmet where there is
a risk of falling objects
• Approved hearing protection
• Approved eye protection
Max. speed of output shaft, rpm
This product is in accordance with
applicable EC directives.
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 meters.
Machines fitted with saw blades or
grass blades can be thrown violently
to the side when the blade comes
into contact with a fixed object. The
blade is capable of amputating an
arm or leg. Always keep people and
animals at least 15 meters from the machine.
Arrows which show limits for handle
positioning.
Always wear approved protective
gloves.
Wear sturdy, non-slip boots.
Only use non-metallic, flexible
cutting attachments, i.e. trimmer
heads with trimmer cord.
Air purge
Noise emission to the environment
according to the European
Community’s Directive. The
machine’s emission is specified in
the Technical data chapter and on the
label.
Other symbols/decals on the
machine refer to special certification
requirements for certain markets.
The engine is switched off by moving
the stop switch to the stop position.
CAUTION! The stop switch
automatically returns to the start
position. In order to prevent
unintentional starting, the spark plug cap must be
15
15 m
5
0
FT
50FT
removed from the spark plug when assembling, checking
m
and/or performing maintenance.
Always wear approved protective
gloves.
Regular cleaning is required.
Visual check.
Approved eye protection must always
be used.
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CONTENTS
Contents
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
GENERAL SAFETY PRECA UTIONS
Impor tant .............................................................. 6
Personal protective equipment ............................. 6
Machine ′ s safety equipment ................................. 7
Cutting equipment ................................................ 10
ASSEMBL Y
Fitting the handlebar ............................................. 12
Assembling and dismantling the two-piece shaft . 12
Assembling the cutting equipment ....................... 13
Fitting a blade guard, grass blade and grass cutter 13
Fitting the blade guard and saw blade .................. 14
Fitting other guards and cutting attachments ....... 14
Adjusting the harness and brush cutter ................ 15
Standard harness ................................................. 15
FUEL HANDLING
Fuel saf ety ............................................................ 16
Fuel ...................................................................... 16
Fueling .................................................................. 17
ARTING AND STOPPING
Chec k before starting ........................................... 18
Starting and stopping ........................................... 18
ORKING TECHNIQUES
Gener al working instructions ................................ 20
MAINTENANCE
Carb urettor ........................................................... 25
Muffler .................................................................. 25
Cooling system ..................................................... 26
Spark plug ............................................................ 26
Air filter ................................................................. 27
Maintenance schedule ......................................... 28
TECHNICAL D ATA
echnical data ...................................................... 29
EC Declaration of Conformity ............................... 30
Note the f ollowing before starting:
Please read the oper ator's manual carefully.
ARNING! Long-term exposure to noise
can result in permanent hearing
impairment. So always use approved
hearing protection.
ARNING! Under no circumstances may
the design of the machine be modified
without the permission of the
manufacturer. Always use original
accessories. Non-authorized
modifications and/or accessories can
result in serious personal injury or the
death of the operator or others.
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.
English
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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 Husqvarna River, for production
of muskets. The location was logical, since water power was harnessed from the Huskvarna River to create the waterpowered plant. During the more than 300 years in existence, 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. The business concept is to develop, manufacture and market motor-driven products for forestry and
gardening, as well as for the building and construction industry. Husqvarna
ergonomics, usability, security and environmental protection. That is the reason why we have developed many different
features to add to our products within these areas.
We are convinced that you will appreciate with great satisfaction the quality and performance of our product for a very
long time to come. The purchase of one of our products 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 authorised dealers, ask for the
address of your nearest service workshop.
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 (usage, service, maintenance, etc), the life span and
the second-hand value of the machine can be extended. If you sell this machine, make sure that the operator
is passed on to the buyer.
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.
s aim is also to be at the front edge for
s manual
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1
WHA T IS WHA T?
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2
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4
18
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What is what on the brush cutter?
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 Suspension ring
11 Cylinder cover
12 Starter handle
13 Fuel tank
14 Choke control
15 Air purge
16 Air filter cover
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22
1
21
4
25
RX
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29
9
30
12
24
23
26
14
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31
7
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28
RK
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5
10
6
15
16
32
27
17 Handle adjustment
18 Locking nut
19 Support flange
20 Support cup
21 Drive disc
22 Trimmer head
23 Socket spanner
24 Operator ′ s manual
25 Transport guard
26 Locking pin
27 Harness
28 Shaft coupling (525RK)
29 Start throttle button
30 Adjusting the throttle wire
31 Spark plug cap and spark plug
32 Allen key
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GENERAL SAFETY PRECA UTIONS
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Impor tant
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 ”Personal protective equipment” heading.
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 safety
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
Maintenance heading.
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 meters 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 meters.
Carry out an overall inspection of the machine before
use. See the maintenance schedule.
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.
ARNING! Never allow children to use or
be in the vicinity of the machine. As the
machine is equipped with a springloaded stop switch and can be started by
low speed and force on the starter
handle, even small children under some
circumstances can produce the force
necessary to start the machine. This can
mean a risk of serious personal injury.
Therefore remove the spark plug cap
when the machine is not under close
supervision.
Personal protective equipment
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.
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.
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.
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– English
ARNING! Running an engine in a
confined or badly ventilated area can
result in death due to asphyxiation or
carbon monoxide poisoning.
GENERAL SAFETY PRECA UTIONS
!
EYE PR OTECTION
Always wear approved eye protection. If you use a visor
then you must also wear approved protective goggles.
Approved protective goggles must comply with the ANSI
Z87.1 standard in the USA or EN 166 in EU countries.
GLOVES
Gloves should be worn when necessary, e.g. when fitting
cutting attachments.
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IMPOR TANT!
All servicing and repair work on the machine requires
special training. This is especially true of the machine
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.
ARNING! 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.
s
BOOTS
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 service workshop.
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.
A
B
Make sure the throttle control is locked at the idle setting
when the throttle lockout is released.
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GENERAL SAFETY PRECA UTIONS
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Press the throttle loc kout and make sure it returns to its
original position when you release it.
Cutting attac hment guard
This guard is intended to pre vent loose objects from being
thrown towards the operator. The guard also protects the
operator from accidental contact with the cutting
attachment.
8
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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
be checked. See instructions under the heading
Maintenance.
Stop s witch
Use the stop s witch to switch off the engine.
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.
WARNING! Never use a cutting
attachment without an approved guard.
See the chapter on Technical data. If an
incorrect or faulty guard is fitted this can
cause serious personal injury.
Vibration damping system
our machine is equipped with a vibration damping
system that is designed to minimize vibration and make
operation easier.
Start the engine and make sure the engine stops when
you move the stop switch to the stop setting.
– English
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
Regularly check the vibration damping units for cracks or
deformation. Check that the vibration damping element is
undamaged and securely attached.
′s handle unit.
GENERAL SAFETY PRECAUTIONS
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WARNING! Overexposure to vibration
can lead to circulatory damage or nerve
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damage in people who have impaired
circulation. Contact your doctor if you
experience symptoms of overexposure
to vibration. These 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.
Never use a machine that has a faulty muffler.
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 mesh. Check whether the muffler on your
machine is fitted with this kind of mesh.
Regularly check that the muffler is securely attached to
the machine.
If the muffler on your machine is fitted with a spark
arrestor mesh this must be cleaned regularly. A blocked
mesh will cause the engine to overheat and may lead to
serious damage.
NOTE!
Make sure that the spark arrestor is screwed in place
correctly.
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!
For mufflers it is very important that you follow the
instructions on checking, maintaining and servicing your
machine.
WARNING! The inside of the muffler
contain chemicals that may be
carcinogenic. Avoid contact with these
elements in the event of a damaged
muffler.
English – 9
GENERAL SAFETY PRECAUTIONS
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!
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.
Grass blades and grass knifes are intended for cutting
coarse grass.
A trimmer head is intended for trimming grass.
General rules
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
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attachment. This continues to rotate even
after the throttle has been released.
Ensure that the cutting attachment has
stopped completely and disconnect the
spark plug cap before you start to work
on it.
WARNING! Using an incorrect cutting
attachment or an incorrectly sharpened
!
blade increases the risk of blade thrust.
Cutting equipment
Saw blades are intended for cutting fibrous types of wood.
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
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.
10 – English
GENERAL SAFETY PRECAUTIONS
Sharpening grass knifes and grass blades
• See the cutting attachment packaging for correct
sharpening instructions. Sharpen blades and knifes
using a single-cut flat file.
• Sharpen all edges equally to maintain the balance of
the blade.
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.
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.
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
Trimmer head
IMPORTANT!
Always ensure the trimmer cord is wound tightly and
evenly around the drum, otherwise the machine will
generate harmful vibration.
• 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 before use. This will make
the cord tougher so that it lasts longer.
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