Page 1
Operator′s manual
K 970
K 970 Rescue
Please read the operator’s manual carefully and make sure you
understand the instructions before using the machine.
EEEEnnnngggglllliiiisssshh
hh
Page 2
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 make sure you understand
the instructions before using the machine.
Wear personal protective equipment. See
instructions under the heading ”Personal
protective equipment”.
This product is in accordance with
applicable EC directives.
WARNING! Dust forms when cutting, this
can cause injuries if inhaled. Use an
approved breathing mask. Avoid inhaling
petrol fumes and exhaust fumes. Always
provide for good ventilation.
Explanation of warning levels
The warnings are graded in three levels.
WARNING!
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!
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!
NOTICE! Used if there is a risk of damage to materials or
the machine if the instructions in the manual are not
followed.
WARNING! Kickbacks can be sudden,
rapid 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 combustible materials
such as: petrol (gas), wood, dry grass etc.
Noise emission to the environment
according to the European Community’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.
2 – English
Page 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 power cutter - K 970? .................. 5
PRESENTATION
What is what on the power cutter - K 970 Rescue? ..... 6
MACHINE´S SAFETY EQUIPMENT
General ........................................................................ 7
CUTTING BLADES
General ........................................................................ 9
Abrasive blades ........................................................... 9
Diamond blades ........................................................... 10
Toothed blades, carbide tipped blades and emergency
situations ...................................................................... 10
Transport and storage .................................................. 10
ASSEMBLING AND ADJUSTMENTS
General ........................................................................ 11
Checking the drive shaft and flange washers .............. 11
Fitting the cutting blade ................................................ 11
Guard for the blade ...................................................... 11
FUEL HANDLING
General ........................................................................ 12
Fuel .............................................................................. 12
Fuelling ........................................................................ 12
Transport and storage .................................................. 12
OPERATING
Protective equipment ................................................... 13
General safety precautions .......................................... 13
Transport and storage .................................................. 16
STARTING AND STOPPING
Before starting ............................................................. 17
Starting ........................................................................ 17
Stopping ....................................................................... 18
MAINTENANCE
General ........................................................................ 19
Maintenance schedule ................................................. 19
Cleaning ....................................................................... 20
Functional inspection ................................................... 20
TECHNICAL DATA
Technical data .............................................................. 24
Cutting equipment ........................................................ 24
EC-declaration of conformity ........................................ 25
English – 3
Page 4
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 your 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.
This operator’s manual is a valuable document. Make sure it
is always at hand at the work place. By following 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 for 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
forestry, 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.
National legislation could regulate the use of this machine.
Find out what legislation is applicable in the place where you
work before you start using the machine.
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
below.
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.
X-Torq®
The X-Torq® engine provides a more accessible torque for a
wider range of speeds which results in maximum cutting
capacity. X-Torq® reduces the fuel consumption with up to
20% and the emissions with up to 60%.
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.)
Air purge
When you push the air purge diaphragm, fuel is pumped
through to the carburettor. Fewer pulls are required for
starting, meaning the machine becomes easier to start.
DEX
Low flushing wet cutting kit for effective dust handling.
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
development and therefore reserves the right to modify the
design and appearance of products without prior notice.
4 – English
Efficient vibration damping system
Efficient vibration dampers spare arms and hands.
Specially designed starter handle (K 970 Rescue)
Specially designed starter handle, with room for heavy
gloves.
Adjustable carry strap (K 970 Rescue)
Adjustable carry strap for full freedom of movement.
Chromium-plated blade guard (K 970 Rescue)
Chromium-plated blade guard, visible in smoke and water
spray, enhances control of the cutter.
Page 5
PRESENTATION
What is what on the power cutter - K 970?
1 Front handle
2 Water tap
3 Warning decal
4 Air filter cover
5 Cylinder cover
6 Choke
7 Throttle lockout
8 Throttle control
9 Air purge
10 Stop switch
11 Starter handle
12 Starter
13 Decompression valve
14 Muffler
15 Adjustment handle for guard
16 Guard for the blade
17 Fuel tank
18 Water connection with filter
19 Belt guard
20 Rating plate
21 Cutting arm
22 Belt tensioner
23 Cutting head
24 Cutting blade
25 Combination spanner
26 Operator′s manual
English – 5
Page 6
PRESENTATION
What is what on the power cutter - K 970 Rescue?
1 Front handle
2 Water tap
3 Warning decal
4 Air filter cover
5 Cylinder cover
6 Choke
7 Throttle lockout
8 Throttle control
9 Air purge
10 Stop switch
11 Starter handle
12 Decompression valve
13 Starter
14 Muffler
15 Adjustment handle for guard
16 Guard for the blade
17 Fuel tank
18 Harness
19 Belt guard
20 Rating plate
21 Cutting arm
22 Belt tensioner
23 Cutting head
24 Cutting blade
25 Combination spanner
26 Operator′s manual
6 – English
Page 7
MACHINE´S SAFETY EQUIPMENT
General
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.
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).
• Start the power cutter and apply full throttle. Release the
throttle control and check 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. See instructions in the
section "Maintenance".
Stop switch
Use the stop switch to switch off the engine.
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
original position when you release it.
Checking the stop switch
• Start the engine and make sure the engine stops when
you move the stop switch to the stop setting.
Guard for the blade
WARNING! Always check that the guard is
correctly fitted before starting the machine.
!
This guard is fitted above the cutting blade and is designed to
prevent parts of the blade or cutting fragments from being
thrown towards the user.
• Check that the throttle control and throttle lockout move
freely and that the return springs work properly.
Checking the blade guard
• Check that the guard over the cutting blade is not cracked
or damaged in any other way. Replace when damaged.
• Check that the cutting blade is fitted correctly and does
not show signs of damage. A damaged cutting blade can
cause personal injury.
English – 7
Page 8
MACHINE´S SAFETY EQUIPMENT
Vibration damping system
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.
• 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.
Muffler
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.
The muffler is designed to keep noise levels to a minimum
and to direct exhaust fumes away from the user.
Checking the vibration damping system
WARNING! The engine should be switched
off, and the stop switch in STOP position.
!
• Check the vibration damping units regularly for cracks or
deformation. Replace them if damaged.
• Check that the vibration damping element is securely
attached between the engine unit and handle unit.
Inspecting the muffler
Check regularly that the muffler is complete and secured
correctly.
8 – English
Page 9
CUTTING BLADES
General
WARNING! A cutting blade may burst and
cause injury to the operator.
!
• Cutting blades are available in two basic designs;
abrasive baldes and diamond blades.
• High-quality blades are often most economical. Lower
quality blades often have inferior cutting capacity and a
shorter service life, which results in a higher cost in
relation to the quantity of material that is cut.
• Make sure that the right bushing is used for the cutting
blade to be fitted on the machine. See the instructions
under the heading Assembling the cutting blade.
Suitable cutting blades
Cutting blades K 970 K 970 Rescue
Abrasive blades Yes* Yes*
Diamond blades Ye s Ye s
Toothed blads No Yes**
*Without water
**See instructions under the heading "Toothed blades,
carbide tipped blades and emergency situations".
Cutting blades for different materials
WARNING! Never use a cutting blade for any
other materials than that it was intended for.
!
Hand-held, high-speed machines
WARNING! Never use a cutting blade at a
lower speed rating than that of the power
!
cutter. Only use cutting blades intended for
high speed handheld power cutters.
• Our cutting blades are manufactured for high-speed,
portable power cutters.
• Check that the blade is approved for the same or higher
speed according to the aproval plate of the engine. Never
use a cutting blade with a lower speed rating than that of
the power cutter.
Blade vibration
• The blade can become out-of-round and vibrate if an
excessive feed pressure is used.
• A lower feed pressure can stop the vibration. Otherwise
replace the blade.
Abrasive blades
• The cutting material on abrasive blades consists of grit
bonded using an organic binder. ”Reinforced blades” are
made up of a fabric or fibre base that prevents total
breakage at maximum working speed if the blade should
be cracked or damaged.
• A cutting blade’s performance is determined by the type
and size of abrasive corn, and the type and hardness of
the bonding agent.
• Ensure the blade it not cracked or damaged in any other
way.
Cutting plastics with a diamond blade can
cause kickback when the material melts due
to the heat produced when cutting and
sticks to the blade. Never cut plastic
materials with a diamond blade!
Follow the instructions supplied with the cutting blade
concerning the suitability of the blade for various applications,
or consult your dealer in case of doubts.
Concrete Metal Plastic Cast iron
Abrasive
blades
Diamond
blades
* CAUTION! Only specialty blades.
X X X X
X X* X*
• Test the abrasive blade by hanging it on your finger and
tapping it lightly with a screwdriver or the like. If the blade
does not produce a resonant, ringing sound it is damaged.
English – 9
Page 10
CUTTING BLADES
Abrasive blades for different materials
Blade type Material
Concrete, asphalt, stone masonry,
Concrete blade
Metal blade
!
cast iron, aluminium, copper,
brass, cables, rubber, plastic, etc.
Steel, steel alloys and other hard
metals.
WARNING! Do not use abrasive blades with
water. The strength is impaired when
abrasive blades are exposed to water or
moisture, which results in an increased risk
of the blade breaking.
Diamond blades
General
WARNING! Cutting plastics with a diamond
blade can cause kickback when the material
!
melts due to the heat produced when cutting
and sticks to the blade.
Sharpening diamond blades
• Always use a sharp diamond blade.
• 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 blade by cutting in a soft material such as
sandstone or brick.
Diamond blades for dry cutting
• Diamond blades for dry cutting can be used both with and
without water cooling.
• When dry cutting, lift the blade out from the cut every 30–
60 seconds and let it rotate in the air for 10 seconds to let
it cool. If this is not done, the blade may be overheated.
Diamond blades for wet cutting
• Diamond blades for wet cutting must be water cooled. If
this is not done, the blade may be overheated.
• Water cooling cools the blade and increases its service
life while also reducing the formation of dust.
WARNING! Diamond blades get very hot
when used. An overheated blade is a result
!
of improper use, and may cause deformation
of the blade, resulting in damage and
injuries.
• Diamond blades consist of a steel core provided with
segments that contain industrial diamonds.
• Diamond blades ensure lower costs per cutting operation,
fewer blade changes and a constant cutting depth.
• When using diamond blades make sure that it rotates in
the direction indicated by the arrow on the blade.
Diamond blades for different materials
• Diamond blades are ideal for masonry, reinforced
concrete and other composite materials.
• Diamond blades are available in several hardness
classes.
• Special blades should be used when cutting metal. Ask
your dealer for help in choosing the right product.
Toothed blades, carbide tipped blades and emergency situations
Carbide tipped specialty blades are intended only for use in
rescue missions and only by trained staff.
Transport and storage
• Do not store or transport the power cutter with the cutting
blade fitted. All blades should be removed from the cutter
after use and stored carefully.
• Store cutting blades in dry, frost free conditions. Special
care should be taken with abrasive blades. Abrasive
blades must be stored on a flat, level surface. If an
abrasive blades is stored in humid conditions, this can
cause imbalance and result in injury.
• Inspect new blades for transport or storage damage.
10 – English
Page 11
ASSEMBLING AND ADJUSTMENTS
General
WARNING! The engine should be switched
off, and the stop switch in STOP position.
!
Checking the drive shaft and flange
washers
When the blade is replaced with a new one, check the flange
washers and the drive shaft.
• Check that the threads on the drive shaft are undamaged.
• Check that the contact surfaces on the blade and the
flange washers are undamaged, of the correct dimension,
clean, and that they run properly on the drive axle.
• Lock the shaft.
• Tightening torque for the bolt holding the blade is: 15-25
Nm (130-215 in.lb).
Guard for the blade
• The guard for the cutting equipment should be adjusted so
that the rear section is flush with the work piece. Spatter
and sparks from the material being cut are then collected
up by the guard and led away from the user. The guard
must always be fitted on the machine.
• Do not use warped, notched, indented or dirty flange
washers. Do not use different dimensions of flange
washers.
Fitting the cutting blade
• Husqvarna’s blades are approved for hand-held power
cutters.
• Bushings can be fitted on the machine axle to adjust the
machine to the centre hole of the blade. Use a bushing
with the correct diameter! The blades are marked with the
diameter of the centre hole.
• When a diamond blade is mounted on the power cutter
make sure that the diamond blade will rotate in the
direction indicated by the arrow on the blade.
• The blade is placed on the bushing (A) between the inner
flange washer (B) and the flange washer (C). The flange
washer is turned so that it fits on the axle.
English – 11
Page 12
FUEL HANDLING
General
WARNING! Running an engine in a confined
or badly ventilated area can result in death
!
due to asphyxiation or carbon monoxide
poisoning. Use fans to ensure proper air
circulation when working in trenches or
ditches deeper than one meter.
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.
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.
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, even small
inaccuracies can drastically affect the ratio of the mixture.
• 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
for air-cooled, two-stroke engines.
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
Fuelling
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.
Petrol
• Use good quality unleaded or leaded petrol.
• The lowest octane recommended is 90 (RON). If you run
the engine on a lower 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
rating 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 performance 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.
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.
Never start the machine:
• If you have spilt fuel or engine oil on the machine. Wipe off
the spill and allow the remaining fuel to evaporate.
• If you have spilt fuel on yourself or your clothes, change
your clothes. Wash any part of your body that has come in
contact with fuel. Use soap and water.
• If the machine is leaking fuel. Check regularly for leaks
from the fuel cap and fuel lines.
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 for this purpose.
Long-term storage
Mixing
• Always mix the petrol and oil in a clean container intended
for fuel.
12 – English
• 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.
Page 13
OPERATING
Protective equipment
General
• Do not use the machine unless you are able to call for 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.
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.
Always wear:
• Approved protective helmet
• Hearing protection
• Approved eye protection. If you use a face shield then you
must also wear approved protective goggles. Approved
protective goggles must comply with standard ANSI Z87.1
in the USA or EN 166 in EU countries. Visors must comply
with standard EN 1731.
• Breathing mask
• Heavy-duty, firm grip gloves.
• Tight-fitting, heavy-duty and comfortable clothing that
permits full freedom of movement.
• Boots with steel toe-caps and non-slip sole.
Other protective equipment
CAUTION! Sparks may appear and start a
fire when you work with the machine. Always
!
keep fire fighting equipment handy.
• Fire Extinguisher
• 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 you understand the instructions before using the
machine.
• Keep in mind that it is you, the operator that is responsible
for not exposing people or their property to accidents or
hazards.
• The machine must be kept clean. Signs and stickers must
be fully legible.
Always use common sense
It is not possible to cover every 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!
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.
English – 13
Page 14
OPERATING
Work area safety
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.
• 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 by parts if the blade breaks.
• Do not use the machine in bad weather, such as dense
fog, heavy rain, strong wind, intense cold, etc. Working in
bad weather is tiring and can lead to dangerous
conditions, e.g. slippery surfaces.
• Never start to work with the power cutter before the
working area is clear and you have a firm foothold. Look
out for any obstacles with unexpected movement. 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 safe working environment.
• Make sure that no pipes or electrical cables are routed in
the working area or in the material to be cut.
Basic working techniques
up by the guard and led away from the user. The guards
for the cutting equipment must always be fitted when the
machine is running.
• Never use the kickback zone of the blade for cutting. See
instructions under the heading "Kickback".
• Keep a good balance and a firm foothold.
• Never cut above shoulder height. Never cut from a ladder.
Use a platform or scaffold when working at high altitude.
• Always hold the machine in a firm grip with both hands.
Hold it so that the thumbs and fingers grip round the
handles.
WARNING! Do not pull the power cutter to
one side, this can cause the blade to jam or
!
break resulting in injury to people.
Under all circumstances avoid grinding
using the side of the blade; it will almost
certainly be damaged, break and can cause
immense damage. Only use the cutting
section.
Cutting plastics with a diamond blade can
cause kickback when the material melts due
to the heat produced when cutting and
sticks to the blade. Never cut plastic
materials with a diamond blade!
• The machine is designed and intended for cutting with
abrasive blades or diamond blades intended for high
speed handheld machines. The machine shall not be
used with any other type of blade, or for any other type of
cutting.
• Maintain a safe distance from the cutting blade when the
engine is running.
• Never move the machine when the cutting equipment is
rotating. The machine is equipped with a friction retarder
to shorten the stop time.
• The guard for the cutting equipment should be adjusted so
that the rear section is flush with the work piece. Spatter
and sparks from the material being cut are then collected
• Stand at a comfortable distance from the work piece.
• Check that the blade is not in contact with anything when
the machine is started
• 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.
• Feed down the machine in line with the blade. Pressure
from the side can damage the blade and is very
dangerous.
14 – English
Page 15
OPERATING
• Move the blade slowly forwards and backwards to achieve
a small contact area between the blade and the material
to be cut. This reduces the temperature of the blade and
ensures effective cutting.
Cutting with toothed/carbide tipped blades during rescue operaions
WARNING! A power cutter should never be
used with carbide tipped blade for non-
!
emergency work, such as in the
construction trades.
Be aware at all times that carbide tipped
blades are more kickback prone than
abrasive or diamond blades if not used
properly.
If the public safety force (fire department) that purchased this
power cutter has decided to equip this unit with a carbide
tipped blade for rescue operations, the following safety
considerations must be adhered to.
Thin material
Cutting thin and hard material (i.e. a sheet metal covered roof)
should be conducted in a forward direction for best control.
Pinching or jamming
Make a careful evaluation of how the object will move during
the final stage of the cutting to avoid pinching or jamming. The
cut must open during the cut. If the object sags and the cut
begins to close the blade may pinch, possibly resulting in a
kick-back or damage to the blade.
Cutting in line
Skewing or twisting in the line of cut will reduce cutting
efficiency and damage the blade.
Training and protective equipment
• Only operators trained in the use of cutting with a power
cutter equipped with carbide tipped blade shall be allowed
to operate the power cutter.
• Full protective fire fighting gear shall be worn by the
operator at all times.
• A full face shield (not just protective eye glasses) shall be
worn by the operator to protect the face from flying debris
or a sudden kick-back of the power cutter.
Risk area
No persons that do not have the protective equipment
described above shall be allowed inside the risk area for
thrown material.
20 m (66 ft)
Blade speed
Before each rescue operation
Check that the blade and th blade guard is not damaged or
cracked. Replace the blade or the blade guard if it is exposed
to impact or is cracked.
• Check that no carbide tips have loosened from the cutting
blade.
• Check that the blade is not skew or shows signs of
cracking or other defects.
When cutting in hard materials carbide tipped blades will
rapidly lose its sharpness. For best performance during
rescue operations we recommend that a new blade be
installed.
Kickback
WARNING! Kickbacks are sudden and can
be very violent. The power cutter can be
!
thrown up and back towards the user in a
rotating motion causing serious or even fatal
injury. It is vital to understand what causes
kickback and how to avoid it before using
the machine.
Apply the cutting blade gently with high rotating speed (full
throttle) Maintain full speed until cutting is complete. Low
blade speed, especially in hard and thin materials can result
in jamming and the breaking-off of the carbide tips.
Kickback is the sudden upward motion that can occur if the
blade is pinched or stalled in the kickback zone. Most
kickbacks are small and pose little danger. However a
English – 15
Page 16
OPERATING
kickback can also be very violent and throw the power cutter
up and back towards the user in a rotating motion causing
serious or even fatal injury.
Reactive force
A reactive force is always present when cutting. The force
pulls the machine in the opposite direction to the blade
rotation. Most of the time this force is insignificant. If the blade
is pinched or stalled the reactive force will be strong and you
might not be able to control the power cutter.
Pinching kickback
Pinching is when the cut closes and pinches the blade. If the
blade is pinched or stalled the reactive force will be strong and
you might not be able to control the power cutter.
If the blade is pinched or stalled in the kickback zone, the
reactive force will push the power cutter up and back towards
the user in a rotating motion causing serious or even fatal
injury.
Pipe cutting and pinching
Special care should be taken whet cutting in pipes. If the pipe
is not properly supported and the cut kept open through out
the cut the blade might be pinched in the kickback zone and
cause a severe kickback.
Kickback zone
Never use the kickback zone of the blade for cutting. If the
blade is pinched or stalled in the kickback zone, the reactive
force will push the power cutter up and back towards the user
in a rotating motion causing serious or even fatal injury.
Climbing kickback
If the kickback zone is used for cutting the reactive force
drives the blade to climb up in the cut. Do not use the
kickback zone. Use the lower quadrant of the blade to avoid
climbing kickback.
How to aviod kickback
Avoiding kickback is simple.
• The work piece must always be supported so that the cut
stays open when cutting through. When the cut opens
there is no kickback. If the cut closes and pinches the
blade ther is always a risk of kickback.
• Take care when inserting the blade in an existing cut.
• Be alert to movement of the work piece or anything else
that can occur, which could cause the cut to close and
pinch the blade.
Transport and storage
• Secure the equipment during transportation in order to
avoid transport damage and accidents.
• For transport and storage of cutting blades, see the
section "Cutting blades".
• For transport and storage of fuel, see the section "Fuel
handling".
• Store the equipment in a lockable area so that it is out of
reach of children and unauthorized persons.
16 – English
Page 17
STARTING AND STOPPING
Before starting
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.
Check that the fuel cap is properly secured,
and that there is no fuel leakage. Risk of fire.
• Perform 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 valve automatically returns to its initial
position when the machine starts.
• Start throttle position - warm engine: The correct
choke/start throttle setting is obtained by pulling the choke
control to the choke position and then pushing it in again.
This only engages the start throttle setting without any
choke.
• 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
WARNING! The cutting blade rotates when
the engine is started. Make sure it can rotate
!
freely.
• Stop switch: Make sure that the stop switch (STOP) is in
the left position.
• Start throttle position - cold engine: Start throttle
position and choke is obtained by pulling out the choke
completely.
• 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.
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.
English – 17
Page 18
STARTING AND STOPPING
• 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 fast idle.
Stopping
CAUTION! The cutting blade continues to
rotate up to a minute after the motor has
!
stopped. (Blade coasting.) Make sure that
the cutting blade can rotate freely until it is
completely stopped. Carelessness can
result in serious personal injury.
• Stop the engine by moving the stop switch (STOP) to the
right.
18 – English
Page 19
MAINTENANCE
General
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.
• 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.
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
Guard for the blade* Carburettor
Cutting blade** Starter
*See instructions in the section "Machine’s safety equipment".
** See instructions in the section "Cutting blades" and "Assembly and settings".
English – 19
Page 20
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.
NOTICE! A dirty or blocked air intake results in the machine
overheating which causes damage to the piston and
cylinder.
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 avoid the risk of electric shock.
• If the spark plug is dirty, clean it and at the same time
check that the electrode gap is 0.5 mm. Replace if
necessary.
Functional inspection
General inspection
• Check that nuts and screws are tight.
Drive belt
Check the tension of the drive belt
• For correct tensioning of the drive belt, the square nut
should be positioned opposite the marking on the belt
cover.
Tensioning the drive belt
• The tension of a new drive belt must be readjusted after
one or two tanks of fuel have been used.
• When the machine is equipped with a friction retarder, a
scraping sound can be heard from the bearing housing
when the blade is turned by hand. This is quite normal.
Please contact an accredited Husqvarna workshop if you
have any questions.
• The drive belt is enclosed and well protected from dust
and dirt.
• When the drive belt is to be tensioned, release the bolts
holding the cutting arm.
NOTICE! Always use the recommended spark plug type!
Use of the wrong spark plug can damage the piston/
cylinder.
These factors cause deposits on the spark plug electrodes,
which may result in operating problems and starting
difficulties.
• An incorrect fuel mixture (too much or incorrect type of
oil).
• A dirty air filter.
20 – English
• Screw the adjuster screw so that the square headed nut
comes opposite the marking on the cover. This
automatically ensures that the belt has the correct
tension.
• Tighten both of the screws holding the cutting head using
a T-wrench.
Page 21
MAINTENANCE
Replacing the drive belt
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.
• First release the two bolts and then the adjuster screw to
release the belt tension.
• Now unscrew the bolts and dismantle the belt guard.
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
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.
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 necessary, first turn the screw clockwise
until the blade starts to rotate. Now turn the screw anticlockwise until the blade stops rotating.
• Remove the belt from the belt pulley.
• The cutting head is now loose and can be removed from
the machine. Remove the rear belt guard by releasing the
two screws holding the guard.
• Replace the drive belt.
• Assemble in the reverse order as set out for dismantling.
T
Rec. idle speed: 2700 rpm
English – 21
Page 22
MAINTENANCE
Starter
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.
Checking the 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 periphery of the starter pulley. When the cord is intact:
Release the spring tension by letting the pulley rotate
slowly backwards.
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 spring.
• Check that the spring is not drawn to its end position by
pulling out the starter 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.
Changing a broken or worn starter cord
• Remove any remnants of the old starter cord and check
that the return 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.
• Bear in mind that the return spring lies tensioned in the
starter 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 spring.
22 – English
Page 23
MAINTENANCE
Fitting the starter
• To 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
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.
Replacing the air filter
NOTICE! The air filter must not be cleaned or blown clean
with compressed air. This will damage the filter.
• Remove the screw.
• 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
new filter when it is clogged. The filter should be
changed at least once per year.
• Replace the air filter.
Drive gear, clutch
• Check the clutch centre, drive gear and clutch spring for
wear.
English – 23
Page 24
TECHNICAL DATA
Technical data
Engine K 970, K 970 Rescue
Cylinder displacement, cm
Cylinder bore, mm 56
Stroke, mm 38
Idle speed, rpm 2700
Recommended max. speed, rpm 9300 (+/- 150)
Power, kW/ rpm 4,8/9000
Ignition system
Manufacturer of ignition system SEM
Type of ignition system CD
Spark plug
Electrode gap, mm 0,5
Fuel and lubrication system
Manufacturer of carburettor Walbro
Carburettor type RWJ5
Fuel tank capacity, litre 1,0
Weight
Power cutter without fuel and cutting blade, kg
12” (300 mm) 10,6
14” (350 mm) 11,0
16” (400 mm) 11,8
Noise emissions (see note 1)
Sound power level, measured dB(A) 114
Sound power level, guaranteed LWA dB(A) 116
Sound levels (see note 2)
Equivalent sound pressure level at the operator’s ear,
dB(A)
Equivalent vibration levels, a
Front handle, m/s
Rear handle, m/s
2
2
3
(see note 3) 12” (300 mm) 14” (350 mm) 16” (400 mm)
hveq
93,6
Champion RCJ 6Y/
NGK BPMR 7A
102
3,9 4,3 3,9
3,9 4,7 4,4
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 level, according to EN 1454, is calculated as the time-weighted energy total for different sound
pressure levels under various working conditions. Reported data for equivalent sound pressure level for the machine has a typical
statistical dispersion (standard deviation) of 1 dB (A).
Note 3: Equivalent vibration level, according to EN ISO 19432, is calculated as the time-weighted energy total for vibration levels
under various working conditions. Reported data for equivalent vibration level has a typical statistical dispersion (standard
deviation) of 1 m/s2.
Cutting equipment
Cutting blade Max. peripheral speed, m/s Max. speed of output shaft, rpm
12” (300 mm) 80 4725
14” (350 mm) 100 4725
16” (400 mm) 100 3705
24 – English
Page 25
TECHNICAL DATA
EC-declaration of conformity
(Applies to Europe only)
Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel +46-36-146500, declares under sole responsibility that the power cutters
Husqvarna K 970, K 970 Rescue from 2010’s serial numbers and onwards (the year is clearly stated in plain text on the rating
plate with subsequent serial number), complies with the requirements of the COUNCIL’S DIRECTIVES:
• of May 17, 2006 "relating to machinery" 2006/42/EC
• 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. Conformity assessment according to Annex V.
For information relating to noise emissions, see the chapter Technical data.
The following standards have been applied: EN ISO 12100:2003, CISPR 12:2007, EN ISO 19432:2008.
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.)
English – 25
Page 26
´®z+TNr¶6_¨
´®z+TNr¶6_¨
Page 27
Page 28
1152468-26
´®z+TNr¶6_¨
´®z+TNr¶6_¨
Original instructions
2010-03-30
Loading...