Husqvarna K760 User Manual

Operator′s manual

K760

K760 Rescue

Please read the operator’s manual carefully and make sure you understand the instructions

before using the machine.

GB English

KEY TO SYMBOLS

Manual version

This manual is the International version used for all English speaking countries outside North America. If you operate in North America use the US-version.

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 ”Personal protective equipment” heading.

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.

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, clothes, dry grass etc.

Ensure the blades are not cracked or damaged in any other way.

Do not use circular saw blades

Choke.

2 – English

Air purge

Decompression valve

Refuelling, petrol/oil mix

Noise emission to the environment according to the European Community’s Directive. The machine’s emission is specified in the Technical data chapter and on the label.

You will find the following label on your power cutter:

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!

WARNING! Indicates a hazardous

! situation which, if not avoided, will result in death or serious injury.

CAUTION!

CAUTION! Indicates a hazardous

! situation which, if not avoided, could result in minor or moderate injury.

NOTICE!

NOTICE! Is used to address practices not related to personal injury.

CONTENTS

Contents
KEY TO SYMBOLS
Manual version .....................................................	2
Symbols on the machine ......................................	2
Explanation of warning levels ...............................	2
CONTENTS
Contents ...............................................................	3
PRESENTATION
Dear Customer, ....................................................	4
Design and features .............................................	4
PRESENTATION
What is what on the power cutter - K760? ...........	5
PRESENTATION
What is what on the power cutter - K760 Rescue? 6
MACHINE´S SAFETY EQUIPMENT
General .................................................................	7
CUTTING BLADES
General .................................................................	9
Abrasive blades ....................................................	10
Diamond blades ...................................................	10
Toothed blades, carbide tipped blades and
emergency situations ...........................................	11
Transport and storage ..........................................	11
ASSEMBLING AND ADJUSTMENTS
General .................................................................	12
Checking the drive shaft and flange washers .......	12
Checking the bushing ...........................................	12
Checking the direction of the blade rotation .........	12
Fitting the cutting blade ........................................	12
Blade guard ..........................................................	12
Disengaging OilGuard ..........................................	13
Reversible cutting head ........................................	13
FUEL HANDLING
General .................................................................	14
Fuel ......................................................................	14
Fueling ..................................................................	15
Transport and storage ..........................................	15
OilGuard ...............................................................	15
OPERATING
Protective equipment ............................................	16
General safety precautions ...................................	16
Transport and storage ..........................................	21
STARTING AND STOPPING
Before starting ......................................................	22
Starting .................................................................	22
Stopping ...............................................................	23
MAINTENANCE
General .................................................................	24
Maintenance schedule .........................................	24

Cleaning ................................................................	25
Functional inspection ............................................	25
TECHNICAL DATA
Technical data .......................................................	29
Cutting equipment .................................................	29
EC-declaration of conformity ................................	30

English – 3

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.

Owner 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.

The manufacturer’s reservation

Subsequent to publishing this manual Husqvarna may issue additional information for safe operation of this product. It is the owner’s duty to keep up with the safest methods of operation.

Husqvarna AB has a policy of continuous product development and therefore reserves the right to modify the design and appearance of products without prior notice.

For customer information and assistance, contact us at our website: www.husqvarnacp.com

4 – English

Design and features

This is a high speed, hand held, power cutter designed to cut hard materials like masonry or steel and should not be used for any purpose not described in this manual. Safe operation of this product requires the operator to read this manual carefully. Ask your dealer or Husqvarna should you need more information.

Some of the unique features of your product are described below.

Active Air Filtration™

Centrifugal air cleaning for longer service life and longer service intervals.

OilGuard (K760 OilGuard)

An optical detection system to detect if there is oil in the fuel or if the oil type is wrong.

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 by up to 20% and the emissions by 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 by 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.

Efficient vibration damping system

Efficient vibration dampers spare arms and hands.

Reversible cutting head

The machine is fitted with a reversible cutting head allowing cutting close to a wall or at ground level, restricted only by the thickness of the blade guard.

Specially designed starter handle (K760 Rescue)

Specially designed starter handle, with room for heavy gloves.

Adjustable carry strap (K760 Rescue)

Adjustable carry strap for full freedom of movement.

Chromium-plated blade guard (K760 Rescue)

Chromium-plated blade guard, visible in smoke and water spray, enhances control of the cutter.

PRESENTATION

What is what on the power cutter - K760?

1	Front handle	15	Blade guard
2	Water tap	16	Decompression valve
3	Warning decal	17	Air purge
4	Air filter cover	18	Fuel cap
5	Cylinder cover	19	Water connection with filter
6	Choke control with start throttle lock	20	Belt guard
7	Throttle lockout	21	Cutting arm
8	Throttle trigger	22	Rating plate
9	Stop switch	23	Belt tensioner
10	Disconnection function for OilGuard (K760 OilGuard)	24	Cutting head
11	Starter handle	25	Cutting blade (not supplied)
12	Starter	26	Combination spanner
13	Muffler	27	Water connector, GARDENA®
14	Adjustment handle for guard	28	Operator′s manual

English – 5

PRESENTATION

What is what on the power cutter - K760 Rescue?

1	Front handle	14	Decompression valve
2	Warning decal	15	Air purge
3	Air filter cover	16	Fuel cap
4	Cylinder cover	17	Harness
5	Choke control with start throttle lock	18	Belt guard
6	Throttle lockout	19	Cutting arm
7	Throttle trigger	20	Rating plate
8	Stop switch	21	Belt tensioner
9	Starter handle	22	Cutting head
10	Starter	23	Cutting blade (not supplied)
11	Muffler	24	Combination spanner
12	Adjustment handle for guard	25	Operator′s manual
13	Blade guard

6 – English

MACHINE´S SAFETY EQUIPMENT

	General
	!	WARNING! Never use a machine that has
		faulty safety equipment! If your machine
		fails any 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).

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.

•Check that the throttle trigger and throttle lockout move freely and that the return springs work properly.

•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.

Checking the stop switch

•Start the engine and make sure the engine stops when you move the stop switch to the stop setting.

English – 7

MACHINE´S SAFETY EQUIPMENT

Blade guard

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.

Checking the blade and 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.

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.

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.

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 as well as when idling. Be aware of the fire hazard, especially when working near flammable substances and/ or vapours.

Keep fire fighting equipment handy.

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.

8 – English

CUTTING BLADES

	General
	!	WARNING! A cutting blade may burst
		and cause injury to the operator.

The cutting blade manufacturer issues warnings and recommendations for the use and proper care of the cutting blade. Those warnings come with the cutting blade. Read and follow all instructions from the cutting blade manufacturer.

A cutting blade should be checked before it is assembled on the saw and frequently during use. Look for cracks, lost segments (diamond blades) or pieces broken off. Do not use a damaged cutting blade.

Test the integrity of each new cutting blade by running it at full throttle for about 1 minute.

•Cutting blades are available in two basic designs; abrasive blades 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 Fitting the cutting blade.

Suitable cutting blades

Cutting blades	K760	K760 Rescue
Abrasive blades	Yes*	Yes*
Diamond blades	Yes	Yes
Toothed blads	Do not use	Yes**

For more information, see the ”Technical data” section.

*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 what it was

intended to cut.

Never use a diamond blade to cut plastic material. The heat produced during cutting may melt the plastic and it can stick to the cutting blade and cause a kickback.

Cutting metal generates sparks that may cause fire. Do not use the machine near ignitable substances or gases.

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	X	X	X	X
blades
Diamon	X	X*		X*
d blades
* Only specialty blades.

Hand held, high speed machines

WARNING! Never use a cutting blade with a ! lower speed rating than that of the power

cutter. Only use cutting blades intended for high speed handheld power cutters.

• Many cutting blades that might fit this power cutter are intended for stationary saws and have a lower speed rating than is needed for this hand-held saw. Cutting blades with a lower speed rating shall never be used on this saw.

• Husqvarna cutting blades are manufactured for highspeed, 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.

English – 9

CUTTING BLADES

	Abrasive blades
	!	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.

•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 cutting blade is not cracked or damaged.

•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.

Abrasive blades for different materials

Blade type

Material

Concrete, asphalt, stone masonry, Concrete blade cast iron, aluminium, copper, brass,

cables, rubber, plastic, etc.

Metal blade

Steel, steel alloys and other hard metals.

10 – English

Diamond blades

General

WARNING! Never use a diamond blade to ! cut plastic material. The heat produced

during cutting may melt the plastic and it can stick to the cutting blade and cause a kickback.

Diamond blades become 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.

Cutting metal generates sparks that may cause fire. Do not use the machine near ignitable substances or gases.

• 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.

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.

CUTTING BLADES

Diamond blades and cooling

•During cutting the friction in the cut causes the diamond blade to be heated up. If the blade is allowed to get too hot this can result in loss of blade tensioning or core cracking.

Diamond blades for dry cutting

•Although no water is required for cooling, dry cutting blades must be cooled with air flow around the blades. For this reason dry cutting blades are recommended only for intermittent cutting. Every few seconds of cutting the blade should be allowed to run 'free” with no load to allow the air flow around the blade to dissipate the heat.

Diamond blades for wet cutting

•Wet cutting diamond blades must be used with water to keep the blade core and segments cool during sawing.

•Wet cutting blades should NOT be used dry.

•Using wet cutting blades without water can cause excessive heat build-up, resulting in poor performance, severe blade damage and is a safety hazard.

•Water cooling cools the blade and increases its service life while also reducing the formation of dust.

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.

English – 11