STIHL HSA 66 Owner's Manual

STIHL HSA 66

WARNING

Read and follow all safety precautions in Instruction Manual – improper use can cause serious or fatal injury.

ADVERTENCIA

Lea y siga todas las precauciones de seguridad dadas en el manual de instrucciones – el uso incorrecto puede causar lesiones graves o mortales.

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Instruction Manual Manual de instrucciones

Instruction Manual 1 - 29

Manual de instrucciones 30 - 59

Contents

English

Guide to Using this Manual 2 Safety Precautions and Working

Techniques 2 Description of Operation 10 Using the Unit 10 Connecting Charger to Power

Supply 11 Charging the Battery 11 Light Emitting Diodes (LED) on

Original Instruction ManualPrinted on chlorine-free paper

Battery 12 Light Emitting Diodes (LED) on

Charger 14 Switching On 15 Switching Off 16 Storing the Machine 16 Sharpening Instructions 17 Maintenance and Care 18 Main Parts 19 Specifications 20 Special Accessories 22 Troubleshooting 23 Maintenance and Repairs 25

Printing inks contain vegetable oils, paper can be recycled.

Battery Recycling 25 Disposal 25 Trademarks 26 Addresses 27 General Power Tool Safety

Warnings 27

Allow only persons who fully understand this manual to operate your hedge trimmer.

To receive maximum performance and satisfaction from your STIHL hedge trimmer, it is important that you read, understand and follow the safety precautions and the operating and maintenance instructions in chapter "Safety Precautions and Working Techniques" before using your hedge trimmer. For further information you can go to www.stihlusa.com.

Contact your STIHL dealer or the STIHL distributor for your area if you do not understand any of the instructions in this manual.

WARNING

Because a hedge trimmer is a highspeed cutting tool some special safety precautions must be observed to reduce the risk of personal injury. Careless or improper use may cause serious or even fatal injury.

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HSA 66

English

Guide to Using this Manual Safety Precautions and

Pictograms

All the pictograms attached to or embossed on the machine are shown and explained in this manual.

Symbols in Text

Many operating and safety instructions are supported by illustrations.

The individual steps or procedures described in the manual may be marked in different ways:

N A bullet marks a step or procedure. A description of a step or procedure that

refers directly to an illustration may contain item numbers that appear in the illustration. Example:

N Loosen the screw (1). N Lever (2) ...

In addition to the operating instructions, this manual may contain paragraphs that require your special attention. Such paragraphs are marked with the symbols and signal words described below:

DANGER

Indicates an imminent risk of severe or fatal injury.

WARNING

Indicates a hazardous situation which, if not avoided, could result in severe or fatal injury.

NOTICE Indicates a risk of property damage,

including damage to the machine or its individual components.

Engineering Improvements

STIHL’s philosophy is to continually improve all of its products. As a result, engineering changes and improvements are made from time to time. Therefore, some changes, modifications and improvements may not be covered in this manual. If the operating characteristics or the appearance of your machine differs from those described in this manual, please contact your STIHL dealer for assistance.

Working Techniques

Because a hedge trimmer is a high-speed, fastcutting power tool with sharp cutting blades and is powered by electricity, special safety precautions must be observed to reduce the risk of personal injury.

It is important that you read, fully understand and observe the following safety precautions and warnings. Read the instruction manual and the safety precautions periodically. Careless or improper use may cause serious or fatal injury.

Have your STIHL dealer show you how to operate your power tool. Observe all applicable local safety regulations, standards and ordinances.

The use of noise emitting power tools may be restricted to certain times by national or local regulations.

WARNING

Do not lend or rent your power tool without the instruction manual. Be sure that anyone using it understands the information contained in this manual.

HSA 66

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WARNING

The use of this machine may be hazardous. If the cutting tool comes in contact with your body, it will cut you.

Use your hedge trimmer only for cutting hedges, shrubs, scrub and similar material.

WARNING

Do not use it for other purposes, since misuse may result in personal injury or property damage, including damage to the machine.

WARNING

Minors should never be allowed to use this power tool. Bystanders, especially children, and animals should not be allowed in the area where it is in use.

WARNING

To reduce the risk of injury to bystanders and damage to property, never let your power tool run unattended. When it is not in use (e.g. during a work break), shut it off and make sure that unauthorized persons do not use it. To do this, move retaining latch to ƒ and remove the battery from the power tool.

Most of these safety precautions and warnings apply to the use of all STIHL hedge trimmers. Different models may have different parts and controls. See the appropriate section of your instruction manual for a description of the controls and the function of the parts of your model.

Always remove the battery and move retaining latch to ƒ before transporting, storing or carrying out any work on the power tool. This avoids the risk of the motor starting unintentionally.

STIHL recommends the use of original STIHL replacement parts. They are specifically designed to match your model and meet your performance requirements.

Safe use of a hedge trimmer involves

1. the operator

2. the power tool

3. the use of the power tool.

THE OPERATOR

Physical Condition You must be in good physical condition

and mental health and not under the influence of any substance (drugs, alcohol, etc.) which might impair vision, dexterity or judgment. Do not operate this machine when you are fatigued.

WARNING

Be alert – if you get tired, take a break. Tiredness may result in loss of control. Working with any power tool can be strenuous. If you have any condition that might be aggravated by strenuous work, check with your doctor before operating this machine.

Proper Clothing

WARNING

To reduce the risk of injury, the operator should wear proper protective apparel.

WARNING

To reduce the risk of injury to your eyes never operate your power tool unless wearing goggles or properly fitted protective glasses with adequate top and side protection complying with ANSI Z 87.1 (or your applicable national standard.)

STIHL recommends the use of sound barriers (ear plugs or ear mufflers) to protect your hearing.

Clothing must be sturdy and snug-fitting but allow complete freedom of movement. Wear long pants made of heavy material to help protect your legs. Do not wear shorts.

Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that could become caught on branches, brush or the moving parts of the unit. Secure hair so it is above shoulder level.

Good footing is very important. Wear sturdy boots with nonslip soles. Never wear sandals, flipflops or go barefoot.

HSA 66

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Always wear gloves when handling the machine and the cutting tool. Heavy-duty, nonslip gloves improve your grip and help to protect your hands.

THE POWER TOOL

For illustrations and definitions of the power tool parts see the chapter on "Main Parts."

WARNING

Never modify this power tool in any way, since this may increase the risk of personal injury. Only attachments supplied by STIHL or expressly approved by STIHL for use with the specific STIHL model are authorized. Although certain unauthorized attachments are useable with STIHL power tools, their use may, in fact, be extremely dangerous.

If your power tool is subjected to unusually high loads for which it was not designed (e.g. heavy impact or a fall), always check that it is in good condition before continuing work – see also "Before Starting Work." Make sure the safety devices are working properly. Do not continue operating your power tool if it is damaged. In case of doubt, have the machine checked by your STIHL servicing dealer.

Battery

WARNING

Risk of fire, explosion and / or burns, including chemical burns. Do not disassemble, crush, heat above 212 °F (100 °C), expose to fire or incinerate. Never expose the battery to microwaves or high pressures.

Do not place the battery on or near fires, stoves or in other high-temperature locations. Do not place the battery in direct sunlight or store it inside a vehicle in hot weather. Doing so may cause the battery to generate heat, rupture or ignite. Using the batteries in this manner may also result in a loss of performance and a shortened life expectancy.

In case of fire: Stay clear of any vapors or gases generated, taking wind direction into account. If possible without danger, remove battery from the vicinity of the fire. In principle, cooling the battery or extinguishing the fire with water is possible. It is preferable to extinguish the fire with a multipurpose dry chemical fire extinguisher. As for any fire, evacuate the area and fight the fire from a safe distance. Once the fire has been extinguished, the area should be monitored (fire watch) in case of a flareup, until the battery has cooled sufficiently. Restrict access to the area until completion of clean-up. Do not touch the burnt battery or any spilled liquids. Use inert absorbent to absorb spilled liquids.

Use and store the battery only within a temperature range from 14 °F (-10 °C) and no more than 122 °F (+ 50 °C). Protect the battery from direct sunlight.

WARNING

Use STIHL batteries only with STIHL power tools and charge them only with STIHL chargers. Replace battery with STIHL battery only. Use only original STIHL rechargeable batteries.

Charge the battery before use.

Protect from rain – do not immerse in fluids.

WARNING

Do not open, drop, hit or damage battery. Never insert objects into the battery's cooling slots, since they may damage the battery. The battery contains safety features and devices which, if damaged, may cause the battery to generate heat, rupture or ignite. Never use or charge a defective, damaged, cracked or deformed battery.

Immediately discontinue use of the battery if, while using, charging or storing, it emits an unusual smell, feels hot or appears abnormal in any other way.

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WARNING

Fluid may leak from the battery if it is damaged or is not used properly – avoid contact with the skin! Leaking battery fluid can cause skin irritation and chemical burns. In the event of accidental contact, immediately rinse thoroughly with mild soap and water. If fluid gets into your eye(s), do not rub your eye(s) and rinse water over the open eye(s) for 15 minutes at least. Also seek medical attention immediately.

WARNING

Never bridge (short circuit) the battery terminals with metallic objects, since this may damage the battery and possibly cause a fire. Keep a battery that is not in use away from metal objects (e.g. nails, coins, jewelry). Do not use metal containers for transporting batteries.

Store the battery out of reach of children in a cool and dry area away from direct sunlight and excess heat or cold (14 °F – 122 °F (-10 °C – +50 °C)).

Charger Use only original STIHL chargers. Use only for charging geometrically

matching STIHL batteries with a maximum capacity of 50 Ah and a maximum voltage of 42 V.

Never charge defective, leaking or deformed batteries.

Connect the charger only to a power supply with the voltage and frequency specified on the rating plate. Always connect the charger to a properly installed wall outlet.

Never use a charger with damaged housing, damaged power supply cord or damaged plug. Do not operate the charger if it has received a sharp blow, been dropped or otherwise damaged in any way.

Do not open or dissassemble charger – there are no user serviceable parts inside.

Store charger out of the reach of children.

Protect the charger from rain and dampness. Keep charger dry.

Use and store charger only indoors in dry rooms.

Operate charger at temperatures between 41 °F (5 °C) and 104 °F (40 °C).

Allow the charger to cool down normally – do not cover it.

Never bridge the contacts of the charger with metallic objects (e.g. nails, coins, jewelry) – short circuit. The charger may be damaged by a short circuit.

In the event of smoke or fire in the charger, disconnect it from outlet immediately.

WARNING

To reduce the risk of electric shock or short circuit, do not insert any objects into the charger's cooling slots.

WARNING

The charger heats up during the charging process. Do not operate on an easily combustible surface (e.g. paper, texiles) or in an easily combustible environment – risk of fire.

WARNING

Do not operate in a hazardous location, i.e. in a location where there are combustible liquids (fumes), vapors or dusts. Chargers can produce sparks, which may ignite the dust or vapors – risk of explosion.

Check the charger's power supply cord and plug regularly for damage. If the power supply cord or plug is damaged, immediately disconnect the plug from the wall outlet to avoid the risk of electric shock.

Never jerk the power supply cord to disconnect it from the wall outlet. To unplug, grasp the plug, not the cord. Have a damaged power supply cord repaired by an experienced electrician.

Do not use the power supply cord for any other purpose, e.g. for carrying or hanging up the charger.

Never use power supply cords that do not comply with regulations.

Make sure the power supply cord is located and/or marked so that it will not be stepped on, tripped over, come in contact with sharp edges or moving parts or otherwise be subjected to damage or stress.

HSA 66

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9938BA008 KN

An extension cord should not be used unless absolutely necessary. If an extension cord must be used, plug the charger into a properly wired 16 gauge (AWG 16) or heavier gauge extension cord with blades that are the same number, size and shapes as the blades on the charger.

To reduce the risk of electric shock: – Always connect the unit to a

properly installed wall outlet.

– Make sure the insulation of the

power supply cord and plug is in good condition.

Unplug the power supply cord from the outlet when charger is not in use.

Never store the battery in the charger.

THE USE OF THE POWER TOOL

Remove the battery from the power tool before:

– carrying out tests and adjustments

or cleaning work

– working on the cutting attachment – leaving the power tool unattended – transporting the power tool – storing the power tool – performing repairs and

maintenance work

– in the event of danger or in an

emergency

Transporting the Unit

WARNING

To reduce the risk of injury from blade contact, never carry or transport your power tool with the cutting blades moving.

WARNING

Always switch off the power tool, move retaining latch to ƒ, remove the battery and fit the scabbard over the cutting blades – even when you carry the unit for short distances. When transporting it in a vehicle, properly secure the power tool to prevent turnover and damage.

Remove the battery from the power tool. This avoids the risk of the motor starting unintentionally.

Carry the power tool by the handle – cutting blades behind you.

Before Starting Work

WARNING

Always check your power tool for proper condition and operation before starting, particularly the trigger switch, trigger switch lockout, switch lever and

retaining latch. The trigger switch, trigger switch lockout and switch lever must move freely and always spring back to the idle position (retaining latch on ‚). Never attempt to modify the controls or safety devices.

Your power tool is equipped with a system designed to quickly stop the cutting blades – they come to an immediate standstill as soon as you release the trigger switch and/or the switch lever on the loop handle.

WARNING

Check this function at regular short intervals. To reduce the risk of injury, do not operate your power tool if the cutting blades continue to run. Contact your servicing dealer.

WARNING

Never use a power tool that is damaged or not properly maintained.

Keep the handles clean and dry at all times; it is particularly important to keep them free of moisture, pitch, oil, grease or resin in order for you to maintain a firm grip and properly control your power tool.

WARNING

The cutting blades must be properly tightened and in safe operating condition. Inspect for loose parts (nuts, screws, etc.) and for cracked, bent, warped or damaged blades. Regularly check the condition and tightness of the cutting blades – with the motor stopped, retaining latch on ƒ and battery

HSA 66

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9938BA007 KN

9938BA006 KN

removed! Replace damaged cutting blades before using the power tool. Always keep blades sharp.

STIHL recommends that you always spray the cutting blades with STIHL resin solvent before starting work – with the motor stopped, retaining latch on ƒ and battery removed! You can obtain this protective spray from your dealer. Apply generously.

Check contacts in battery compartment for foreign matter. Keep clean.

Fit the battery correctly – it must engage audibly.

For specific starting instructions, see the appropriate section of your instruction manual.

WARNING

To reduce the risk of injury from blade contact, be absolutely sure that the cutting blades are clear of you and all other obstructions and objects, including the ground.

WARNING

Your power tool is a one-person machine. Do not allow other persons in the general work area, even when starting.

During Operation Holding and Controlling the Power Tool Always hold the unit firmly with both

hands on the handles while you are working. Wrap your fingers and thumbs around the handles.

Right-Handers

Right hand on the control handle and left hand on the loop handle.

Left-Handers

Left hand on the control handle and right hand on the loop handle.

Make sure you have firm and secure footing and hold the unit so that the cutting blades are always away from your body.

WARNING

Never attempt to operate your power tool with one hand. Loss of control of the power tool resulting in serious or fatal injury may result. To reduce the risk of cut injuries, keep hands and feet away from the cutting blades. Never touch moving cutting blades with your hand or any other part of your body. Do not touch the cutting blades while the motor is running. If the cutting blades become jammed by thick branches or other obstructions, switch off the motor immediately, move retaining latch to ƒ and remove the battery before attempting to free the blades.

WARNING

Do not overreach. Keep proper footing and balance at all times. Special care must be taken in slippery conditions (wet ground, snow) and in difficult, overgrown terrain. Watch for hidden obstacles such as tree stumps, roots and ditches to avoid stumbling. For better footing, clear away fallen branches, scrub and cuttings. Be extremely cautious when working on slopes or uneven ground.

Working Conditions Operate your power tool only under

good visibility and daylight conditions only. Work carefully.

HSA 66

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Do not cut any material other than hedges or similar soft vegetation. Do not cut stems greater than 17 mm (0.7 inch) thick.

WARNING

If the vegetation being cut or the surrounding ground is coated with a chemical substance (such as an active pesticide or herbicide), read and follow the instructions and warnings that accompanied the substance at issue.

WARNING

Inhalation of certain dusts, especially organic dusts such as mold or pollen, can cause susceptible persons to have an allergic or asthmatic reaction. Substantial or repeated inhalation of dust and other airborne contaminants, in particular those with a smaller particle size, may cause respiratory or other illnesses. Control dust at the source where possible. Use good work practices, such as operating the unit so that the wind or operating process directs any dust raised by the power tool away from the operator. Follow the recommendations of EPA / OSHA / NIOSH and occupational and trade associations with respect to dust ("particulate matter.") When the inhalation of dust cannot be substantially controlled, i.e., kept at or near the ambient (background) level, the operator and any bystanders should wear a respirator approved by NIOSH / MSHA for the type of dust encountered.

If the hedge is very dusty or dirty, spray the blades with STIHL resin solvent from time to time during cutting. This helps

reduce blade friction as well as the aggressive effects of sap and the buildup of dirt particles.

Operating Instructions

WARNING

In the event of an emergency, switch off the motor immediately, move retaining latch to ƒ and remove the battery.

WARNING

Before you start work, examine the hedge area for stones, fence wire, metal or other solid objects which could damage the cutting blades.

Take particular care when cutting hedges next to or against wire fences. Do not touch the wire with the cutting blades. When working close to the ground, make sure that no sand, grit or stones get between the cutting blades.

Striking solid foreign objects such as stones, fence wire or metal could damage the cutting attachment and may cause blades to crack, chip or break. STIHL does not recommend the use of your power tool when cutting in areas where the blades could contact such objects.

WARNING

Observe the cutting blades at all times – do not cut any areas of the hedge that you cannot see. When cutting the top of a taller hedge, check the other side of the hedge frequently for bystanders, animals and obstructions. Do not damage the property of other persons

DANGER

Do not rely on the tool’s insulation against electric shock. To reduce the risk of electrocution, never operate this power tool in the vicinity of any wires or cables (power, etc.) which may be carrying electric current.

Check the cutting blades at regular short intervals during operation, or immediately if there is a noticeable change in cutting behavior:

– Switch off the motor. – Move retaining latch to ƒ. – Remove the battery. – Check condition and tightness, look

for cracks.

– Check sharpness. – Replace damaged or dull cutting

blades immediately, even if they have only superficial cracks.

The drive motor is not waterproof. Never work with the power tool in the rain or in wet or very damp locations.

Do not leave the machine outdoors in the rain.

HSA 66

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WARNING

To reduce the risk of injury from loss of control, never work on a ladder, in a tree or any other insecure support. Never hold the machine above shoulder height.

Be particularly alert and cautious when wearing hearing protection because your ability to hear warnings (shouts, alarms, etc.) is restricted.

WARNING

To reduce the risk of fire, always clean plant residue, chips, leaves and excess lubricant off the motor.

After Finishing Work Always clean dust and dirt off the power

tool – do not use any grease solvents for this purpose.

Spray the blades with STIHL resin solvent. Run the motor briefly so that the solvent is evenly distributed.

MAINTENANCE, REPAIR AND STORING

If you make a warranty claim for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used, STIHL may deny coverage.

WARNING

Use only identical STIHL replacement parts for maintenance and repair. Use of non-STIHL parts may cause serious or fatal injury.

Strictly follow the maintenance and repair instructions in the appropriate section of your instruction manual. Please also refer to the maintenance chart in this manual.

Always move retaining latch to ƒ and remove the battery from the power tool before carrying out any repairs or maintenance work, such as replacing the cutting blades. This avoids the risk of the motor starting unintentionally.

WARNING

Always switch off the motor, move retaining latch to ƒ, remove the battery and make sure that the cutting tool is stopped before doing any maintenance or repair work or cleaning the power tool. Do not attempt any maintenance or repair work not described in your instruction manual. Have such work performed by your STIHL servicing dealer only.

Wear gloves when handling or performing maintenance on the blades.

WARNING

Never repair damaged cutting attachments by welding, straightening or modifying the shape. This may cause parts of the cutting blades to come off and result in serious or fatal injuries.

Keep the cutting blades sharp. Tighten all nuts, bolts and screws after each use.

Regularly check the electrical contacts and ensure that the insulation of the power cord and plug of the charger is in good condition and show no sign of aging (brittleness).

Electrical components, e.g. power cord of charger, may only be repaired or replaced by a qualified electrician.

Clean plastic components with a cloth. Do not use aggressive detergents. They may damage the plastic.

Do not spray the machine with water. Do not clean your machine with a

pressure washer. The solid jet of water may damage parts of the machine.

Clean cooling air inlets in motor housing as necessary.

Keep the battery guides free from foreign matter – clean as necessary.

Store the power tool in a dry, locked location with the retaining latch on ƒ, the battery removed and out of reach of children.

HSA 66

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3901BA004 KN

Description of Operation Using the Unit

The power tool is operated with a rechargeable battery. Use only STIHL chargers to recharge the battery.

Data exchange

The power tool, battery and charger communicate with each other. The charger charges the battery and the battery supplies the necessary power only if data exchange functions properly. For this reason you should operate your power tool only with the approved STIHL batteries and STIHL chargers.

Cutting Season

Observe country-specific or municipal rules and regulations for cutting hedges.

N Do not use your power tool during

other people's rest periods.

Cutting Sequence

N Use lopping shears or a chain saw

to cut out thick branches first.

N Cut both sides of the hedge first,

then the top.

Recommendation: Only cut hedges that are no more than chest height.

Disposal

N Do not throw cuttings into the

garbage can – they can be composted!

Working Techniques

Vertical cut

Swing the cutting blade from the bottom upwards in an arc – lower the nose of the blade, move along the hedge and then swing the blade up again in an arc.

Any working position above head height is tiring. To minimize the risk of accidents, work in such positions for short periods only.

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3901BA025 KN

3901BA006 KN

3901BA015 KN

3901BA019 KN

3901BA009 KN

Horizontal cut

Hold the cutting blade at an angle of 0° to 10° as you swing the hedge trimmer horizontally, using both sides of the blade.

Swing the cutting blade in an arc towards the outside of the hedge so that the cuttings are swept to the ground.

Connecting Charger to Power Supply

Mains voltage and operating voltage must be the same.

N Insert the mains plug (1) in the wall

outlet (2).

A self test is performed after the charger is connected to the power supply. During this process the light emitting diode (1) on the charger lights up green for about 1 second, then red and goes off again.

Charging the Battery

When delivered, the battery is not fully charged.

It is advisable to charge the battery completely before using it for the first time.

N Connect the charger to the power

supply – mains voltage and operating voltage of the charger must match – see "Connecting the charger to the power supply"

Operate the charger only in a closed, dry space at ambient temperatures of 41 °F (5 °C) to 104 °F (40 °C).

N Slide the battery (1) into the

charger (2) until you start to feel resistance – then push it in until it engages

Repeat the procedure several times on wide hedges.

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3901BA014 KN

3901BA010 KN

After insertion of the battery, the LED (3) on the charger is on – see "Light-emitting diodes (LED) on charger".

The charging process begins as soon as the LEDs (4) on the battery are green – see "Light-emitting diodes (LED) on battery".

The charging time is dependent on different factors such as battery condition, ambient temperature, etc. and can therefore deviate from the specified charging times – see "Specifications".

The battery warms up in the machine during use. If a warm battery is inserted in the charger, it may be necessary for the battery to cool off before charging. The charging process does not start until the battery has cooled off. The charging time can be extended by the cooling off period.

The battery and the charger warm up during the charging process.

AL 100 charger

The charger waits with the charging procedure until the battery has cooled off on its own. The battery is cooled by the heat emitted to the ambient air.

Charging finished

Once the battery is completely charged, the charger switches off automatically, then:

– the LEDs on the battery go out – the LED on the charger goes out – the fan on the charger switches off

(if present in the charger)

Remove the charged battery from the charger after charging.

Light Emitting Diodes (LED) on Battery

Four LEDs indicate the charge state of the battery as well as any problems that occur with the battery or the machine.

N Press button (1) to activate the

display – display switches off automatically after 5 seconds

The LEDs can be green, red or flashing.

LED is continuously green.

LED flashes green.

LED is continuously red.

LED flashes red.

AL 300 charger

The charger is equipped with a fan for cooling the battery. The fan can be heard during operation.

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3901BA016 KN

80 - 100 %

60 - 80 %

40 - 60 %

20 - 40 %

0 - 20 %

3901BA016 KN

80 - 100 %

60 - 80 %

40 - 60 %

20 - 40 %

0 - 20 %

3901BA041 KN

During charging

The LEDs indicate the progress of charging by lighting up continuously or flashing.

During charging, the current charging capacity is indicated by a flashing green LED.

When the charging process is completed, the LEDs on the battery switch off automatically.

If the LEDs on the battery are continuously red or flash red – see "If the red LEDs are continuously red / flash".

During work

The green LEDs indicate the charge state by lighting up continuously or flashing.

If the LEDs on the battery are continuously red or flash red – see "If the red LEDs are continuously red / flash".

If the red LEDs are continuously red / flash

A 1 LED is contin-

uously red:

B4LEDs

Battery is too hot

1) 2)

/cold

Fault in battery

flash red:

C 3 LEDs are con-

tinuously red:

Machine is too hot – allow it to cool off

D3LEDs

flash red:

During charging: The charging

Fault in machine

process starts automatically after the battery has cooled down / warmed up.

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3901BA019 KN

During work: Machine switches off automatically – let the battery cool off for a while, it may help to remove the battery from the machine for this.

Electromagnetic malfunction or fault. Remove battery from the machine and reinsert it. Turn on the machine – if the LEDs still flash, the battery is faulty and must be replaced.

Electromagnetic malfunction or fault. Remove battery from the machine and reinsert it. Turn on the machine – if the LEDs still flash, the machine is faulty and must be checked by a servicing dealer – STIHL recommends STIHL servicing dealers.

Light Emitting Diodes (LED) on Charger

The light emitting diode (1) lights up green or flashes red.

Green continuous light ...

... means the following: The battery

– is being charged – is too hot and must cool down

before it is charged

See also "Light Emitting Diodes (LED) on Battery".

The green light emitting diode on the charger goes off as soon as the battery is fully charged.

Red flashing light ...

... means the following: – No electrical contact between

battery and charger – remove and refit the battery

– Faulty battery – see also "Light

Emitting Diodes (LED) on Battery".

– Charger faulty – have checked by a

servicing dealer. STIHL recommends a STIHL servicing dealer.

HSA 66

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3901BA028 KN

3901BA029 KN

9938BA005 KN

Switching On

A factory-new battery is not fully charged.

Recommendation: Fully charge the battery before using it for the first time.

N If necessary, remove the cover from

the battery compartment before fitting the battery, i.e. depress both locking tabs to unlock and remove the cover.

Fitting the Battery

N Insert the battery (1) in the power

tool – the battery slides into the compartment – press it down carefully until it snaps into position – the battery must be flush with the top of the housing.

Switching on the Machine

N Make sure you have a secure and

firm footing.

N Stand upright – hold the power tool

in a relaxed position.

N Make sure the cutting attachment is

not touching the ground or any other objects.

N Hold the power tool with both hands

– one hand on the control handle – one hand on the loop handle.

N Unlock the power tool by moving the

retaining latch (2) to ‚.

N Push the switch lever (3) against

the loop handle and hold it there.

N Push down the trigger switch

lockout (4) and depress the trigger switch (5) and hold them in that position.

The motor runs only if the retaining latch (2) is on ‚ and the switch lever (3) and trigger switch (5) are operated simultaneously.

Trigger

Motor speed can be controlled with the trigger switch. Depress the trigger switch to accelerate the motor.

HSA 66

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9938BA004 KN

3901BA034 KN

3901BA035 KN

3901BA039 KN

Switching Off

N Release the switch lever (1) and the

trigger switch (2).

N Move the retaining latch (3) to ƒ –

the trigger switch (4) cannot be operated – the power tool is locked to prevent start-up.

Always remove the battery from the power tool during work breaks and after finishing work.

Remove the battery.

N Press in both locking tabs (1) at the

same time to unlock the battery.

N Take the battery (2) out of the

housing.

When the machine is not in use, store it in such a way that it does not endanger others.

Secure it against unauthorized use.

Storing the Machine

N Move the retaining latch to ƒ. N Remove the battery. N Clean the cutting blades, check

condition and spray them with STIHL resin solvent.

N Fit the blade scabbard. N Thoroughly clean the machine,

especially the cooling air inlets.

N Store the machine in a dry, locked

location – the blade scabbard can be mounted to the wall for this purpose. Keep out of the reach of children and other unauthorized persons.

Cover for Battery Compartment

In some markets the machine comes with a cover for the battery compartment. It protects the battery compartment from contamination.

N After finishing work, slide the

cover (1) home until it engages audibly in position.

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English

Storing the Battery

N Take the battery out of the power

tool or the charger.

N Store indoors in a dry and safe

location. Keep out of the reach of children and other unauthorized persons and protected from contamination.

N Do not store spare batteries unused

– use in rotation.

To optimize the life of the battery, store it at a state of charge of about 30%.

Storing the Charger

N Remove the battery. N Disconnect the plug from the wall

outlet.

N Store the charger indoors in a dry

and secure location. Keep out of the reach of children and other unauthorized persons and protected from contamination.

Sharpening Instructions

When cutting performance and behavior begin to deteriorate, i.e. blades frequently snag on branches: Resharpen the cutting blades.

It is best to have the cutting blades resharpened by a dealer on a workshop sharpener. STIHL recommends a STIHL servicing dealer.

It is also possible to use a flat crosscut sharpening file. Hold the sharpening file at the prescribed angle (see "Specifications").

N Only sharpen the cutting edge – do

not file blunt projecting parts of the cutting blade or the cutting blade guard (see "Main Parts and Controls")

N Always file towards the cutting

edge.

N The file only sharpens on the

forward stroke – lift it off the blade on the backstroke.

N Use a whetstone to remove burr

from cutting edge.

N Remove as little material as

possible.

N After sharpening, clean away filing

or grinding dust and then spray the cutting blades with STIHL resin solvent.

HSA 66

NOTICE Do not operate your machine with dull or

damaged cutting blades. This may cause overload and will give unsatisfactory cutting results.

English

Maintenance and Care

The following intervals apply to normal operating conditions only. If your daily working time is longer or operating conditions are difficult (very dusty work area, etc.), shorten the specified intervals accordingly.

Move the retaining latch to

Complete machine

Controls (retaining latch, trigger switch lockout, trigger switch and switch lever)

Two-hand control

Cooling inlets

All accessible screws and nuts Retighten X

Battery Visual inspection XXX

Battery compartment

Cutting blade

Gearbox and connecting rod

Safety labels Replace X

Spray with STIHL resin solvent after cleaning

STIHL recommends a STIHL servicing dealer.

ƒ before performing any work on the power tool.

Visual inspection (condition) X

Clean X

Check operation X

Clean XX

Check function – blades must quickly come to a standstill when the trigger switch and/or switch lever is released

Visual inspection X

Clean X

Clean XX

Check operation (eject battery) X

Visual inspection XXX

Clean

Sharpen XX

Have checked by servicing dealer every 50 hours of operation

Have STIHL gear lubricant replenished every 50 hours of operation by servicing

dealer

after

before starting work

after finishing work or daily

weekly

monthly

every 12 months

if problem

if damaged

if required

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