Page 1
EEEEnnnngggglllliiiisssshh
hh
K 760 Cut-n-Break
Operator′s manual
Please read the operator’s manual carefully and make sure you
understand the instructions before using the machine.
Page 2
2 – English
KEY TO SYMBOLS
Symbols on the machine:
WARNING! The machine can be a
dangerous tool if used incorrectly or
carelessly, which can cause serious or
fatal injury to the operator or others.
Please read the operator’s manual
carefully and mak
e sure you understand
the instructions before using the machine.
Wear personal protective equipment. See
instr
uctions under the heading ”Personal
protective equipment”.
WARNING! Dust forms when cutting, this
can cause injur
ies if inhaled. Use an
approved breathing mask. Avoid inhaling
petrol fumes and exhaust fumes. Always
provide for good ventilation.
WARNING! Kickbacks can be sudden,
r
apid and violent and can cause life
threatening injuries. Read and understand
the instructions in the manual before using
the machine.
WARNING! Sparks from the cutting blade
can cause fire in comb
ustible materials
such as: petrol (gas), wood, dry grass etc.
Water cooling must always be used.
Always cut in the correct direction. See
instr
uctions in the section "Operation".
This product is in accordance with
applicab
le EC directives.
Noise emission to the environment
according to the European Comm
unity’s
Directive. The machine’s emission is
specified in chapter Technical data and on
label.
Other symbols/decals on the machine
refer to special certification requirements for certain
markets.
Explanation of warning levels
The warnings are graded in three levels.
WARNING!
CAUTION!
NOTICE!
!
WARNING! Used if there is a risk of serious
injury or death for the operator or damage to
the surroundings if the instructions in the
manual are not followed.
!
CAUTION! Used if there is a risk of injury to
the operator or damage to the surroundings
if the instructions in the manual are not
followed.
NOTICE! Used if there is a risk of damage to materials or
the machine if the instructions in the manual are not
followed.
Page 3
English – 3
CONTENTS
Contents
KEY TO SYMBOLS
Symbols on the machine: ............................................. 2
Explanation of warning levels ...................................... 2
CONTENTS
Contents ...................................................................... 3
PRESENTATION
Dear Customer, ............................................................ 4
Features ....................................................................... 4
PRESENTATION
What is what on the machine? ..................................... 5
MACHINE´S SAFETY EQUIPMENT
General ........................................................................ 6
BLADES
General ........................................................................ 8
Diamond blades for different materials ........................ 8
Water cooling ............................................................... 8
Sharpening diamond blades ........................................ 8
Transport and storage .................................................. 8
FUEL HANDLING
General ........................................................................ 9
Fuel .............................................................................. 9
Fuelling ........................................................................ 9
Transport and storage .................................................. 9
OPERATING
Protective equipment ................................................... 10
General safety precautions .......................................... 10
Transport and storage .................................................. 12
STARTING AND STOPPING
Before starting ............................................................. 13
Starting ........................................................................ 13
Stopping ....................................................................... 14
MAINTENANCE
General ........................................................................ 15
Maintenance schedule ................................................. 15
Cleaning ....................................................................... 16
Functional inspection ................................................... 16
TECHNICAL DATA
Technical data .............................................................. 21
Cutting equipment ........................................................ 21
EC-declaration of conformity ........................................ 22
Page 4
4 – English
PRESENTATION
Dear Customer,
Thank you for choosing a Husqvarna product!
It is our wish that you will be satisfied with your product and
that it will be y
our companion for a long time. A purchase of
one of our products gives you access to professional help with
repairs and services. If the retailer who sells your machine is
not one of our authorised dealers, ask him for the address of
your nearest service workshop.
We hope you will find this operator’s manual very useful. By
f
ollowing its´ content (using, service, maintenance etc) the life
span and the second-hand value of the machine can be
extended. If you will sell this machine, make sure that the
buyer will get the operator´s manual.
More than 300 years of innovation
Husqvarna AB is a Swedish company based on a tradition
that dates back to 1689, when the Swedish King Charles XI
ordered the construction of a factory for production of
muskets. At that time, the foundation was already laid f or the
engineering skills behind the development of some of the
world's leading products in areas such as hunting weapons,
bicycles, motorcycles, domestic appliances, sewing
machines and outdoor products.
Husqvarna is the global leader in outdoor power products for
f
orestry, park maintenance and lawn and garden care , as well
as cutting equipment and diamond tools for the construction
and stone industries.
User responsibility
It is the owner’s/employer’s responsibility that the operator
has sufficient knowledge about how to use the machine
safely. Supervisors and operators must have read and
understood the Operator’s Manual. They must be aware of:
• The machine’s safety instructions.
• The machine’s range of applications and limitations.
• How the machine is to be used and maintained.
The manufacturer’s reservation
All information and all data in the Operator’s Manual were
applicable at the time the Operator’ s Manual was sent to print.
Husqvarna AB has a policy of continuous product
de
velopment and therefore reserves the right to modify the
design and appearance of products without prior notice.
Features
Values such as high performance, reliability, innovative
technology, advanced technical solutions and environmental
considerations distinguish Husqvarna's products.
Some of the unique features of your product are described
belo
w.
Active Air Filtration™
Centrifugal air cleaning in three steps for longer service life
and longer service intervals.
SmartCarb™
Built-in automatic filter compensation maintains high power
and reduces fuel consumption.
Dura Starter™
Dust sealed starter unit, where the return spring and the
pulley bearing are sealed which makes the starter virtually
maintenance free and even more reliable.
EasyStart
The engine and starter are designed to ensure quick and
easy starting of the machine. Reduces the pull resistance in
the starter cord with up to 40%. (Reduces the compression
during starting.)
DEX
Low flushing wet cutting kit for effective dust handling.
Specially developed patented diamond
blades
The machine is delivered with specially developed patented
diamond blades fitted.
Page 5
English – 5
PRESENTATION
What is what on the machine?
1 Front handle
2 Water tap
3 Warning decal
4 Air filter cover
5 Choke control
6 Start throttle lock
7 Throttle lockout
8 Throttle control
9 Stop switch
10 Cylinder cover
11 Starter
12 Starter handle
13 Muffler
14 Splash guard
15 Blades
16 Blade guards
17 Cutting arm
18 Rating plate
19 Water connector
20 Fuel tank
21 Air purge
22 Decompression valve
23 Belt tensioner
24 Breaking tool
25 Combination spanner, torx
26 Bearing tool
27 Combination spanner, flat
28 Operator
′s manual
Page 6
6 – English
MACHINE´S SAFETY EQUIPMENT
General
This section describes the machine´s safety equipment, its
purpose, and how checks and maintenance should be carried
out to ensure that it operates correctly.
Throttle lockout
The throttle trigger lock is designed to prevent accidental
operation of the throttle. When the lock (A) is pressed in this
releases the throttle (B).
The trigger lock remains pressed in as long as the throttle is
pressed.
When the grip on the handle is released the throttle
trigger and the throttle trigger lock both return to their original
positions. This is controlled by two independent return spring
systems. This means that the throttle trigger is automatically
locked in the idle position.
Checking the throttle lockout
• 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
or
iginal position when you release it.
• Check that the throttle control and throttle lockout move
freely and that the retur
n springs work properly.
• Start the power cutter and apply full throttle. Release the
throttle control and chec
k that the cutting blade stops and
remains stationary. If the cutting blade rotates when the
throttle is in the idle position you should check the
carburettor’s idle adjustment.
Stop switch
Use the stop switch to switch off the engine.
Checking the stop switch
• Start the engine and make sure the engine stops when
you move the stop switch to the stop setting.
Blade guards
These guards are fitted above and below the blades and are
designed to prevent parts of the blades or cut material from
being thrown towards the user.
Check the blade guards
• Check that the blade guard is not damaged or broken. A
broken or damaged blade guard must never be used.
• Also check that the blades are fitted correctly and are not
damaged in anyway. Damaged blades can cause
personal injuries. See instructions in the section
"Assembling and adjustments".
!
WARNING! Never use a machine that has
faulty safety equipment! If your machine
fails any of these checks contact your
service agent to get it repaired.
The engine should be switched off, and the
stop switch in STOP position.
!
WARNING! Always check that the blade
guards are correctly fitted before starting the
machine.
Page 7
English – 7
MACHINE´S SAFETY EQUIPMENT
Vibration damping system
• Your machine is equipped with a vibration damping
system that is designed to minimize vibration and make
operation easier.
• The machine
′s vibration damping system reduces the
transfer of vibration between the engine unit/cutting
equipment and the machine′s handle unit. The engine
body, including the cutting equipment, is insulated from
the handles by vibration damping units.
Checking the vibration damping system
• Check the vibration damping units regularly for cracks or
deformation. Replace them if damaged.
• Check that the vibration damping element is securely
attached betw
een the engine unit and handle unit.
Muffler
The muffler is designed to keep noise levels to a minimum
and to direct exhaust fumes away from the user.
Inspecting the muffler
Check regularly that the muffler is complete and secured
correctly.
!
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. These
symptoms may be increased in cold
temperatures.
!
WARNING! The engine should be switched
off, and the stop switch in STOP position.
!
WARNING! Never use a machine without a
muffler, or with a faulty muffler. A damaged
muffler may substantially increase the noise
level and the fire hazard. Keep fire fighting
equipment handy.
The muffler gets very hot during and after
use. This also applies during idling. Be
aware of the fire hazard, especially when
working near flammable substances and/or
vapours.
Page 8
8 – English
BLADES
General
• This machine is only to be used with Husqvarna´s
specially developed diamond blades intended for Cut-nBreak. The blades have an integrated belt pulley and are
approved for freehand cutting.
• Diamond blades consist of a steel core provided with
segments that contain industr
ial diamonds.
• Always use a sharp diamond blade.
• Ensure the blades are not cracked or damaged in any
other w
ay. Replace blades if necessary.
Diamond blades for different
materials
• Diamond blades are ideal for masonry, reinforced
concrete and other composite materials. Ask your dealer
for help in choosing the right product.
• Diamond blades are available in several hardness
classes
. A "soft" diamond blade has a relatively short
service life and large cutting capacity. It is used for hard
materials such as granite and hard concrete. A "hard"
diamond blade has a longer service life and reduced
cutting capacity, and should be used for soft materials
such as brick and asphalt.
Water cooling
Water cooling must alwa ys be used. This cools the blades and
increases their life and prevents dust build-up.
Sharpening diamond blades
Diamond blades can become dull when the wrong feeding
pressure is used or when cutting certain materials such as
heavily reinforced concrete. Working with a blunt diamond
blade causes overheating, which can result in the diamond
segments coming loose.
Sharpen the blades by cutting a soft material such as
sandstone or br
ick.
Transport and storage
• Inspect new blades for transport or storage damage.
!
WARNING! Blades can break and cause
serious injuries to the user.
Never use blades other than original blades
designed for the machine.
!
WARNING! Cutting plastics with diamond
blades can cause kickback when the
material melts, due to the heat produced
when cutting, and sticks to the blades.
!
WARNING! Never use blades on a material
other than the one they are intended for.
!
WARNING! Cool diamond blades designed
for wet cutting continuously with water to
prevent heating, which can deform the
diamond blade resulting in damage to the
machine and personal injury.
Page 9
English – 9
FUEL HANDLING
General
Fuel
Petrol
• Use good quality unleaded or leaded petrol.
• The lowest octane recommended is 90 (RON). If you run
the engine on a lo
wer octane grade than 90 so-called
knocking can occur. This gives rise to a high engine
temperature, which can result in serious engine damage.
• When working at continuous high revs a higher octane
r
ating is recommended.
Environment fuel
HUSQVARNA recommends the use of alkylate fuel, either
Aspen two-stroke fuel or environment fuel for four-stroke
engines blended with two-stroke oil as set out below. Note
that carburettor adjustment may be necessary when
changing the type of fuel (see the instructions under the
heading Carburettor).
Two-stroke oil
• For best results and perf ormance use HUSQVARNA twostroke engine oil, which is specially formulated for our aircooled two-stroke engines.
• Never use two-stroke oil intended for water-cooled
engines
, sometimes referred to as outboard oil (rated
TCW).
• Never use oil intended for four-stroke engines.
Mixing
• Always mix the petrol and oil in a clean container intended
for fuel.
• Always start by filling half the amount of the petrol to be
used.
Then add the entire amount of oil. Mix (shake) the
fuel mixture. Add the remaining amount of petrol.
• Mix (shake) the fuel mixture thoroughly before filling the
machine’
s fuel tank.
• Do not mix more than one month’s supply of fuel at a time .
Mixing ratio
• 1:50 (2%) with HUSQVARNA two-stroke oil or equivalent.
• 1:33 (3%) with oils class JASO FB or ISO EGB formulated
f
or air-cooled, two-stroke engines.
Fuelling
Never start the machine:
• If you hav e spilt fuel or engine oil on the machine. Wipe off
the spill and allo
w the remaining fuel to evaporate.
• If you have spilt fuel on yourself or your clothes, change
y
our clothes. W ash any part of your body that has come in
contact with fuel. Use soap and water.
• If the machine is leaking fuel. Check regularly for leaks
from the fuel cap and fuel lines
.
Transport and storage
• Store and transport the machine and fuel so that there is
no risk of any leakage or fumes coming into contact with
sparks or naked flames, for example, from electrical
machinery, electric motors, electrical relays/switches or
boilers.
• When storing and transporting fuel always use approved
containers intended f
or this purpose.
Long-term storage
• When storing the machine for long periods the fuel tank
must be emptied. Contact your local petrol station to find
out where to dispose of excess fuel.
!
WARNING! Running an engine in a confined
or badly ventilated area can result in death
due to asphyxiation or carbon monoxide
poisoning.
Fuel and fuel fumes are highly inflammable
and can cause serious injury when inhaled
or allowed to come in contact with the skin.
For this reason observe caution when
handling fuel and make sure there is
adequate ventilation. Use fans to ensure
proper air circulation when working in
trenches or ditches deeper than one meter.
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!
Do not smoke and do not place any hot
objects in the vicinity of fuel.
NOTICE! The machine is equipped with a two-stroke
engine and must always been run using a mixture of petrol
and two-stroke oil. It is important to accurately measure the
amount of oil to be mixed to ensure that the correct mixture
is obtained. When mixing small amounts of fuel, e ven small
inaccuracies can drastically affect the ratio of the mixture.
Petrol, litre Two-stroke oil, litre
2% (1:50) 3% (1:33)
5
0,10 0,15
10 0,20 0,30
15 0,30 0,45
20 0,40 0,60
!
WARNING! Always stop the engine and let it
cool for a few minutes before refuelling. The
engine should be switched off, and the stop
switch in STOP position.
When refuelling, open the fuel cap slowly so
that any excess pressure is released gently.
Clean the area around the fuel cap.
Tighten the fuel cap carefully after refuelling.
Negligence may lead to the start of a fire.
Move the machine at least 3 m from the
refuelling point before starting it.
Page 10
10 – English
OPERATING
Protective equipment
General
• Do not use the machine unless you are able to call f or help
in the event of an accident.
Personal protective equipment
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.
Always wear:
• Approved protective helmet
• Hearing protection
• Protective goggles or a visor
• Breathing mask
• Heavy-duty, firm grip gloves.
• Tight-fitting, heavy-duty and comfortable clothing that
per
mits full freedom of movement.
• Boots with steel toe-caps and non-slip sole.
Other protective equipment
• Fire Extinguisher and Shovel
• Always have a first aid kit nearby.
General safety precautions
This section describes basic safety directions for using the
machine. This information is never a substitute for
professional skills and experience.
• Please read the operator’s manual carefully and make
sure y
ou understand the instructions before using the
machine.
• Keep in mind that the operator is responsib le for accidents
or hazards occur
ing to other people or their property.
• The machine must be kept clean. Signs and stic kers must
be fully legib
le.
Always use common sense
It is not possible to cover e v ery conceivable situation you can
face. Always exercise care and use your common sense. If
you get into a situation where you feel unsafe, stop and seek
expert advice. Contact your dealer, service agent or an
experienced user. Do not attempt any task that you feel
unsure of!
Water cooling
Water cooling must alwa ys be used. This cools the blades and
increases their life and prevents dust build-up.
There is a restrictor in the water hose that reduces the water
flo
w.
NB! It is important not to use a too high water flow without
throttling as the belt can then slip.
!
WARNING! The use of products such as
cutters, grinders, drills, that sand or form
material can generate dust and vapours
which may contain hazardous chemicals.
Check the nature of the material you intend
to process and use an appropriate breathing
mask.
Long-term exposure to noise can result in
permanent hearing impairment. So always
use approved hearing protection. Listen out
for warning signals or shouts when you are
wearing hearing protection. Always remove
your hearing protection as soon as the
engine stops.
!
CAUTION! Sparks may appear and start a
fire when you work with the machine. Al ways
keep fire fighting equipment handy.
!
WARNING! The machine can be a dangerous
tool if used incorrectly or carelessly, which
can cause serious or fatal injury to the
operator or others.
Never allow children or other persons not
trained in the use of the machine to use or
service it.
Never allow anyone else to use the machine
without first ensuring that they have
understood the contents of the operator’s
manual.
Never use the machine if you are fatigued,
while under the influence of alcohol or
drugs, medication or anything that could
affect your vision, alertness, coordination or
judgement.
!
WARNING! Unauthorized modifications and/
or accessories may lead to serious injury or
death to the user or others. Under no
circumstances may the design of the
machine be modified without the permission
of the manufacturer.
Do not modify this product or use it if it
appears to have been modified by others.
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.
Always use genuine accessories.
!
WARNING! 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.
Page 11
English – 11
OPERATING
Work area safety
• Observe your surroundings to ensure that nothing can
affect your control of the machine.
• Ensure that no one/nothing can come into contact with the
cutting equipment or be hit b
y parts if the blade breaks.
• Do not use the machine in bad weather, such as dense
f
og, heavy rain, strong wind, intense cold, etc. Working in
bad weather is tiring and can lead to dangerous
conditions, e.g. slippery surfaces.
• Never start to work with the power cutter before the
w
orking area is clear and you have a firm foothold. Look
out for any obstacles with unexpected mo vement. Ensure
when cutting that no material can become loose and fall,
causing operating injury .Take great care when working on
sloping ground.
• Ensure that the working area is sufficiently illuminated to
create a saf
e working environment.
• Make sure that no pipes or electrical cables are routed in
the w
orking area or in the material to be cut.
At a low water pressure, for example when the water tank is
used, the restr
ictor can be dismantled to give the correct
water flow.
Basic working techniques
• This machine is only to be used with Husqvarna´s
specially developed diamond blades intended for Cut-nBreak. The blades have an integrated belt pulley and are
approved for freehand cutting. The machine shall not be
used with any other type of blade, or f or any other type of
cutting.
• Remain at a distance from the blades when the engine is
r
unning.
• Never move the machine when the cutting equipment is
rotating.
• Never use the kickback zone of the blade for cutting. See
instr
uctions under the heading "Kickback".
• Never cut abo ve shoulder height. Never cut from a ladder.
Use a platf
orm or scaffold when working at high altitude.
• Support the work piece in such a way that it is possible to
predict what will happen, and so that the cut remains open
while cutting.
• Always hold the machine in a firm grip with both hands.
Hold it so that the thumbs and fingers g
rip round the
handles.
• Stand at a comfortable distance from the work piece.
• Check that the blades are not in contact with anything
when the machine is star
ted.
• Apply the cutting blade gently with high rotating speed (full
throttle) Maintain full speed until cutting is complete
. Let
the machine work without forcing or pressing the blade.
• Cut in the same direction when cutting into an existing cut.
Mak
e certain that the cut is wide enough and that the
blades are not angled in the cut. This can cause kickback.
• Always cut from top to bottom (A). Remove the cutter and
use a cro
wbar to remove the material that remains
between the cut (B).
• Follow the same sa w cut, but further in the work piece (C),
and repeat the w
ork with the crowbar.
!
WARNING! The safety distance for the power
cutter is 15 metres. You are responsible to
ensure that animals and onlookers are not
within the working area. Do not start cutting
until the working area is clear and you are
standing firmly.
!
WARNING! When cutting vertically, always
cut from the top of the cut and down. Never
cut from the bottom of the cut and up. This
can cause a kickback and result in personal
injury.
!
WARNING! Do not pull the power cutter to
one side, this can cause the blades to jam or
break resulting in personal injury.
Page 12
12 – English
OPERATING
• Repeat this working method until the required cutting
depth is achieved (D, E).
• The blade guards are designed to easily adapt to how
deep in the w
ork piece the power cutter is moved.
Kickback
Kickback is a sudden, rearward motion of the saw that can
occur if the blades are stalled (pinched, jammed, twisted) in
the so called kickback zone. Most kic kbacks are small and felt
as small ”jerks” in the front handle. How e ver, kickback can be
very powerful. If you are not paying attention or have a poor
grip the saw can be thrown all the way back at you.
Cause of kickback
Kickback is caused if you are cutting with the kickback zone
of the blade for example when cutting ”upwards” or towards
you.
General rules
• Never cut upwards or towards you so that the kickback
zone becomes actively cutting.
• Always hold the machine in a firm grip with both hands.
Hold it so that the thumbs and fingers g
rip round the
handles.
• Keep a good balance and a firm foothold.
• When cutting vertically, always cut from the top of the cut
and do
wn.
• Always cut at full throttle.
• Do not cut with the upper quadrant (kickback z one) of the
b
lade.
• Avoid twisting or pushing the blades sideways in the cut.
This can cause kic
kback.
• Take care when inserting the blade in an existing cut.
Mak
e certain that the cut is wide enough and that the
blades are not angled in the cut. This can cause kickback.
• Stand at a comfortable distance from the work piece.
• Never cut above shoulder height.
• Never cut from a ladder. Use a platform or scaffold when
w
orking at high altitude.
• Be on the alert in case the work piece moves or anything
else occurs
, which could cause the cut to close and the
blades to jam.
Pull in
Pull in occurs when the blades’ lo w er sections suddenly stop
or when the cut closes. (To avoid, see the instructions under
the heading ”Basic rules” and ”Jamming/rotation”, here
below.).
Pinching/rotation
If the cut is pressed together this can lead to jamming. The
machine can be pulled down suddenly with a very powerful
jerk.
How to avoid pinching
Support the work piece in such a way that the cut remains
open during the cutting operation and when the cut is
finished.
Check the engine speed
Use a revolution counter regularly to check the engine speed
at the working temperature, at full throttle and without a load.
Transport and storage
• Secure the equipment during transportation in order to
avoid transport damage and accidents.
• For transport and storage of fuel, see the section "Fuel
handling".
• Store the machine and its equipment in a dry and frost
proof place
.
• Store the equipment in a lockable area so that it is out of
reach of children and unauthorized persons.
!
WARNING! Kickback can be very sudden
and viloent, throwing the saw back at you. It
can cause serious or even fatal injuries. It is
vital you understand what causes kickback
and how to aviod it using proper cutting
techique.
Page 13
English – 13
STARTING AND STOPPING
Before starting
• Perf orm daily maintenance. See instructions in the section
"Maintenance".
Starting
• Decompression valve: Press in the valve to reduce the
pressure in the cylinder, this is to assist starting the power
cutter. The decompression valve should always be used
when starting. The v alv e automatically returns to its initial
position when the machine starts.
•
Stop switch: Make sure that the stop s witch (ST OP) is in
the left position.
•
Choke - cold engine: Pull the choke control fully out.
•
Start throttle position: Press in the throttle trigger lock,
throttle control and then the start throttle lock (A). Release
the throttle control and it is locked in the half throttle
position. The lock releases when the throttle control is
pressed in fully.
•
Air purge: Press the air purge diaphragm repeatedly until
fuel fills the diaphragm (at least 6 times). The diaphragm
need not be completely filled.
Start the engine
• Grip the front handle with your left hand. Put your right foot
on the lower section of the rear handle pressing the
machine against the ground. Never twist the starter
cord around your hand.
• Grip the starter handle, slowly pull out the cord with your
right hand until you feel some resistance (the starter pawls
grip), now quickly and powerfully pull the cord.
•
With a cold engine: The machine stops when the engine
fires becase the chokel control is pulled out.
Press the choke control and the decompression valve.
Pull the starter handle until the engine starts.
• When the engine starts, quickly apply full throttle to
automatically disengage f
ast idle.
!
WARNING! Please read the operator’s
manual carefully and make sure you
understand the instructions before using the
machine.
Wear personal protective equipment. See
instructions under the heading ”Personal
protective equipment”.
Make sure no unauthorised persons are in
the working area, otherwise there is a risk of
serious personal injury.
!
WARNING! The blades rotate when the
engine is started. Make sure they can rotate
freely.
NOTICE! Do not pull the starter cord all the way out and do
not let go of the starter handle when the cord is fully
extended. This can damage the machine.
Page 14
14 – English
STARTING AND STOPPING
Stopping
• Stop the engine by moving the stop s witch (STOP) to the
right.
!
CAUTION! The cutting blades continue to
rotate up to a minute after the motor has
stopped. (Blade coasting.) Make sure that
the cutting blades can rotate freely until they
are completely stopped. Carelessness can
result in serious personal injury or even
death.
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MAINTENANCE
General
• Let your Husqvarna dealer regularly check the machine and make essential adjustments and repairs.
Maintenance schedule
In the maintenance schedule you can see which parts of your machine that require maintenance, and with which intervals it should
take place. The intervals are calculated based on daily use of the machine, and may differ depending on the rate of usage.
*See instructions in the section "Machine’s safety equipment".
**See instructions in the section "Blades" and ”Maintenance”.
!
WARNING! The user must only carry out the
maintenance and service work described in
this Operator’s Manual. More extensive work
must be carried out by an authorized service
workshop.
The engine should be switched off, and the
stop switch in STOP position.
Wear personal protective equipment. See
instructions under the heading ”Personal
protective equipment”.
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.
Daily maintenance Weekly maintenance Monthly maintenance
Cleaning Cleaning Cleaning
External cleaning Spark plug
Cooling air intake Fuel tank
Functional inspection Functional inspection Functional inspection
General inspection Vibration damping system* Fuel system
Throttle lockout* Muffler* Air filter
Stop switch* Drive belt Drive gear, clutch
Blade guards* Carburettor Water tap
Blades** Starter
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MAINTENANCE
Cleaning
External cleaning
• Clean the machine daily by rinsing it with clean water after
the work is finished.
Cooling air intake
• Clean the cooling air intake when needed.
Spark plug
• If the machine is low on power, difficult to start or runs
poorly at idle speed: always check the spark plug first
before taking other steps.
• Ensure that the spark plug cap and ignition lead are
undamaged to a
void the risk of electric shock.
• If the spark plug is dirty, clean it and at the same time
chec
k that the electrode gap is 0.5 mm. Replace if
necessary.
These factors cause deposits on the spark plug electrodes,
which ma
y result in operating problems and starting
difficulties.
• An incorrect fuel mixture (too much or incorrect type of
oil).
• A dirty air filter.
Functional inspection
General inspection
• Check that nuts and screws are tight.
Blades
Replacing the blades
The blades have integrated belt pulley halves and are to be
changed in pairs.
• Loosen the bar nuts one turn anticlockwise.
• Screw the belt adjuster a few turns anticlockwise.
• This will position the drive belt in a more favourable
position with regard to assemb
ling the new blades. The
drive belt is not clamped so easily.
• Dismantle the old blades by loosening the centre nut.
• Check the drive belt f or w ear. See instructions under the
heading "Belt dr
ive".
• Position the b lades on each side of the cutting arm. Mak e
sure that the holes f
or both guide pins in the drive belt
halves are aligned so that they correspond with the holes
in the washer, and the nut too . No w fit the bolt and washer
unit with guide pins.
• Tighten the drive belt. See instructions under the heading
"Belt dr
ive".
NOTICE! A dirty or blocked air intak e results in the machine
o
verheating which causes damage to the piston and
cylinder.
NOTICE! Always use the recommended spark plug type!
Use of the wrong spark plug can damage the piston/
cylinder.
NOTICE! It is very important that the blades rotate when the
nut is tightened. This is to ensure that the belt is not
clamped between the integrated drive belt halves on the
blades when the blades/drive belt are pulled together with
the nut. Ideally this is done alternately, i.e. tighten a little,
rotate a little and repeat until the blades are secured.
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MAINTENANCE
Drive belt
• The drive belt is enclosed and well protected from dust
and dirt.
Check the tension of the drive belt
• Check the drive belt adjustment by feeling with your
fingers as illustrated. A correctly adjusted drive belt
should have about 5 mm of movement.
Tensioning the drive belt
• The tension of a new drive belt must be readjusted after
one or two tanks of fuel have been used.
• Loosen the bar nuts one turn anticlockwise.
• Screw the belt tensioner clockwise at the same time as
y
ou feel with your fingers how the drive belt is adjusted.
• A correctly adjusted drive belt should have about 5 mm of
mo
vement.
• Tighten the bar nuts.
Replacing the drive belt
Release the belt tension.
• Remove the blades.
• Remove the cover.
• Remove the drive belt from the nose of the cutting arm.
• Loosen water hose. Slide back the bar and remove the
dr
ive belt.
• Remove the cutting arm by pulling it straight out from the
machine
.
• Loosen the screws holding the belt cover on the cutting
ar
m.
• Remove the old drive belt and put in a new one.
!
WARNING! Never start the engine when the
belt pulley and clutch are removed for
maintenance. Do not start the machine
without the cutting arm or cutting head
fitted. Otherwise the clutch could come
loose and cause personal injuries.
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MAINTENANCE
• Mount the cutting arm with the blade cover.
• Tighten the drive belt.
The movement limiters are fitted last. Clamp together the
plates as illustrated.
• Fit the blades. See instructions under the heading
"Blades".
Carburettor
The carburettor is equipped with fixed needles to ensure the
machine always receives the correct mixture of fuel and air.
When the engine lacks power or accelerates poorly, do the
following:
• Check the air filter and replace if necessary. When this
does not help
, contact an authorised service workshop.
Adjusting the idle speed
Start the engine and check the idling setting. When the
carburettor is set correctly the cutting blade should be still
while engine is idling.
• Adjust the idle speed using the T screw. When an
adjustment is necessar
y, first turn the screw clockwise
until the blade starts to rotate. Now turn the screw anticlockwise until the blade stops rotating.
• Rec. idle speed: 2700 rpm
Starter
Changing a broken or worn starter cord
• Loosen the screws that hold the starter against the
crankcase and remove the starter.
• Pull the cord out about 30 cm and lift it into the cut-out in
the per
iphery of the starter pulley. When the cord is intact:
Release the spring tension by letting the pulley rotate
slowly backwards.
• Remove any remnants of the old starter cord and check
that the retur
n spring works. Insert the new starter cord
through the hole in the starter housing and in the cord
pulley.
Secure the starter cord around the cord pulley as illustrated.
Tighten the fastening well and ensure that the free end is as
short as possible. Secure the end of the starter cord in the
starter handle.
NOTICE! Make sure the scre w holes on the bar are aligned
with the holes on the belt cover. The edges of the upper
cover must lie inside the edges of the lower.
!
CAUTION! If the idle speed cannot be
adjusted so that the cutting attachment
stops, contact your dealer/service
workshop. Do not use the machine until it
has been correctly adjusted or repaired.
!
WARNING! When the recoil spring is wound
up in the starter housing it is under tension
and can, if handled carelessly, pop out and
cause personal injury.
Always be careful when changing the recoil
spring or the starter cord. Always wear
protective goggles.
Page 19
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MAINTENANCE
Tensioning the recoil spring
• Guide the cord through the cut-out in the periphery of the
pulley and wind the cord 3 times clockwise around the
centre of the starter pulley.
• Now pull the starter handle and in doing so tension the
spring. Repeat the procedure once more, but this time
with four turns.
• Note that the starter handle is drawn to its correct home
position after tensioning the spr
ing.
• Check that the spring is not drawn to its end position by
pulling out the star
ter line fully . Slow the starter pulley with
your thumb and check that you can turn the pulley at least
a further half turn.
Changing a broken recoil spring
• Undo the bolt in the centre of the pulley and remove the
pulley.
• Bear in mind that the return spring lies tensioned in the
star
ter housing.
• Loosen the bolts holding the spring cassette.
• Remove the recoil spring by turning the starter over and
loosen the hooks
, with the help of a screwdriver. The
hooks hold the return spring assembly on the starter.
• Lubricate the recoil spring with light oil. Fit the pulley and
tension the recoil spr
ing.
Fitting the starter
• T o fit the starter , first pull out the starter cord and place the
starter in position against the crankcase. Then slowly
release the starter cord so that the pulley engages with
the pawls.
• Tighten the screws.
Fuel system
General
• Check that the fuel cap and its seal are not damaged.
• Check the fuel hose. Replace when damaged.
Fuel filter
• The fuel filter sits inside the fuel tank.
• The fuel tank must be protected from contamination when
filling.
This reduces the risk of operating disturbances
caused by blockage of the fuel filter located inside the
tank.
• The filter cannot be cleaned but must be replaced with a
ne
w filter when it is clogged. The filter should be
changed at least once per year.
Air filter
The air filter only needs to be checked if the engine drops in
power.
• Loosen the screws. Remove the air filter cover.
• Check the air filter and replace if necessary.
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MAINTENANCE
Replacing the air filter
• Loosen the screws. Remove the cover.
• Replace the air filter.
Drive gear, clutch
• Check the clutch centre, drive gear and clutch spring for
wear.
Water tap
• Check and clean the restrictor if necessary.
NOTICE! The air filter must not be cleaned or blown clean
with compressed air. This will damage the filter.
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TECHNICAL DATA
Technical data
Note 1: Noise emissions in the environment measured as sound power (LWA) in conformity with EC directive 2000/14/EC.
Note 2: Equivalent sound pressure le v el, according to EN 1454, is calculated as the time-weighted energy total f or diff erent sound
pressure le
vels under various working conditions. Reported data for equiv alent sound pressure le v el f or the machine has a typical
statistical dispersion (standard deviation) of 1 dB (A).
Note 3: Equivalent vibr ation level, according to EN ISO 19432, is calculated as the time-weighted energy total for vibration le
vels
under various working conditions. Reported data for equivalent vibration level has a typical statistical dispersion (standard
deviation) of 1 m/s
2
Cutting equipment
Max. blade speed, rpm
6200
Engine K 760 Cut-n-Break
Cylinder displacement, cm
3
74
Cylinder bore, mm 51
Stroke, mm 36
Idle speed, rpm 2700
Recommended max. speed, rpm 9300 (+/- 150)
Power, kW/ rpm 3,7/9000
Ignition system
Manufacturer of ignition system SEM
Type of ignition system CD
Spark plug Champion RCJ 6Y
Electrode gap, mm 0,5
Fuel and lubrication system
Manufacturer of carburettor Zama
Carburettor type C3
Fuel tank capacity, litre 0,9
Weight
Weight without fuel, kg 10,9
Noise emissions (see note 1)
Sound power level, measured dB(A) 112
Sound power level, guaranteed L
WA
dB(A) 113
Sound levels (see note 2)
Equivalent sound pressure lev el at the operator’s ear , measured
according to EN 1454 dB(A)
97
Equivalent vibration levels, a
hveq
(see note 3)
Front handle, m/s
2
3,0
Rear handle, m/s
2
2,6
Cutting blade Gear ratio Max. peripheral speed, m/s Max cutting depth, mm
9” (230 mm) 50/79 80 400
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TECHNICAL DATA
´®z+Td"¶6"¨
´®z+Td"¶6"¨
EC-declaration of conformity
(Applies to Europe only)
Husqvarna AB, SE-433 81 Göteborg, Sweden, tel: +46-31-949000, declares under sole responsibility that the power cutter
Husqvarna K 760 Cut-n-Break dating from 2009 serial numbers and onwards (the year is clearly stated on the rating plate,
followed by the serial number), complies with the requirements of the COUNCILíS DIRECTIVE:
• of May 17, 2006 ”relating to machinery”
2006/42/EG.
• of December 15, 2004 ”relating to electromagnetic compatibility”
2004/108/EC.
• of May 8, 2000 ”relating to the noise emissions in the environment”
2000/14/EC. Conf ormity assessment according to Annex V.
For information relating to noise emissions, see the chapter Technical data.
The following standards have been applied:
SS EN ISO 12100:2003, EN ISO 19432:2006, EN 1454:1997, CISPR12:2007.
Göteborg December 29, 2009
Henric Andersson
Vice President, Head of Power Cutters and Construction Equipment
Husqvarna AB
(Authorized representative for Husqvarna AB and responsible for technical documentation.)
Page 23
Page 24
´®z+Td"¶6"¨
2009-12-29
´®z+Td"¶6"¨
1152680-26
Original instructions
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