SCN 60‑22 (01)

About these operating instructions

• Warning! Read and understand all accompanying documentation, including but not limited to instructions, safety warnings, illustrations, and specifications provided with this product. Familiarize yourself with all the instructions, safety warnings, illustrations, specifications, components, and functions of the product before use. Failure to do so may result in electric shock, fire, and/or serious injury. Save all warnings and instructions for future reference.
  
• products are designed for professional users and only trained, authorized personnel are permitted to operate, service and maintain the products. This personnel must be specifically informed about the possible hazards. The product and its ancillary equipment can present hazards if used incorrectly by untrained personnel or if used not in accordance with the intended use.
  
• The accompanying documentation corresponds to the current state of the art at the time of printing. Please always check for the latest version on the product’s page on Hilti’s website. To do this, follow the link or scan the QR code in this documentation, marked with the symbol .
  
• Ensure that these operating instructions are with the product when it is given to other persons.
  

Explanation of symbols

Warnings

Warnings alert persons to hazards that occur when handling or using the product. The following signal words are used:

Symbols in the operating instructions

The following symbols are used in these operating instructions:

	Comply with the operating instructions
	Instructions for use and other useful information
	Dealing with recyclable materials
	Do not dispose of electric equipment and batteries as household waste
	Hilti Li‑ion battery
	Hilti charger

Symbols in illustrations

The following symbols are used in illustrations:

	These numbers refer to the illustrations at the beginning of these operating instructions.
	The numbers in illustrations refer to important work steps or to components important for the work steps. In the text, the corresponding numbers draw attention to these work steps or components, e.g. (3) .
	Item reference numbers are used in the overview illustration and refer to the numbers used in the key in the product overview section.
	This symbol is intended to draw your special attention to certain points for handling the product.

Product-dependent symbols

General symbols

Symbols used in relation to the product.

	The product supports near-field communication (NFC) technology compatible with iOS and Android platforms.
	Li-ion battery
	Never use the battery as a striking tool.
	Do not drop the battery. Never use a battery that has suffered an impact or is damaged in any other way.
	Hilti Li-ion battery type series used. Observe the information given in the section headed Intended use .
	Direct current (DC)
	Chain brake released
	Chain brake applied
	Direction-of-travel arrow, saw chain
	Direction of rotation, screw for chain tensioner
	Opening direction, oil reservoir cap
	If applied on the product, the product has been certified by this certification body for the US and Canadian markets according to the applicable standards.

Warning symbols

Warning symbols warn of dangers.

Warning: Risk of kickback! Comply with all safety instructions relating to the occurrence of and the measures against kickback.

Prohibition symbols

Prohibition symbols indicate "must not do" actions.

Do not use in the rain!

Obligation symbols

Obligation symbols indicate "must do" actions.

	Always work with both hands.
	Wear a hard hat, eye protection and hearing protection.
	Use protective footwear
	Use protective gloves

General power tool safety warnings

WARNING Read all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.
Save all warnings and instructions for future reference.
The term "power tool" in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.
Work area safety

• Keep work area clean and well lit. Cluttered or dark areas invite accidents.
  
• Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
  
• Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
  

Electrical safety

• Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.
  
• Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
  
• Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
  
• Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock.
  
• When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
  
• If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply. Use of an RCD reduces the risk of electric shock.
  

Personal safety

• Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating power tools may result in serious personal injury.
  
• Use personal protective equipment. Always wear eye protection. Protective equipment such as a dust mask, non-skid safety shoes, hard hat or hearing protection used for appropriate conditions will reduce personal injuries.
  
• Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energising power tools that have the switch on invites accidents.
  
• Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.
  
• Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
  
• Dress properly. Do not wear loose clothing or jewellery. Keep your hair and clothing away from moving parts. Loose clothes, jewellery or long hair can be caught in moving parts.
  
• If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of dust collection can reduce dust-related hazards.
  
• Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of a second.
  

Power tool use and care

• Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed.
  
• Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
  
• Disconnect the plug from the power source and/or remove the battery pack, if detachable, from the power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
  
• Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of untrained users.
  
• Maintain power tools and accessories. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool’s operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
  
• Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
  
• Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed. Use of the power tool for operations different from those intended could result in a hazardous situation.
  
• Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery handles and grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.
  

Battery tool use and care

• Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of battery pack may create a risk of fire when used with another battery pack.
  
• Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk of injury and fire.
  
• When battery pack is not in use, keep it away from other metal objects, like paper clips, coins, keys, nails, screws or other small metal objects, that can make a connection from one terminal to another. Shorting the battery terminals together may cause burns or a fire.
  
• Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns.
  
• Do not use a battery pack or tool that is damaged or modified. Damaged or modified batteries may exhibit unpredictable behaviour resulting in fire, explosion or risk of injury.
  
• Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or temperature above 130° C (265 °F) may cause explosion.
  
• Follow all charging instructions and do not charge the battery pack or tool outside the temperature range specified in the instructions. Charging improperly or at temperatures outside the specified range may damage the battery and increase the risk of fire.
  

Service

• Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.
  
• Never service damaged battery packs. Service of battery packs should only be performed by the manufacturer or authorized service providers.
  

Safety instructions for chain saws

General chain saw safety warnings

• Keep all parts of the body away from the saw chain when the chain saw is operating. Before you start the chain saw, make sure the saw chain is not contacting anything. A moment of inattention while operating chain saws may cause entanglement of your clothing or body with the saw chain.
  
• Always hold the chain saw with your right hand on the rear handle and your left hand on the front handle. Holding the chain saw with a reversed hand configuration increases the risk of personal injury and should never be done.
  

• Hold the chain saw by insulated gripping surfaces only, because the saw chain may contact hidden wiring. Saw chains contacting a "live" wire may make exposed metal parts of the chain saw "live'" and could give the operator an electric shock.
  

• Wear eye protection. Further protective equipment for hearing, head, hands, legs and feet is recommended. Adequate protective equipment will reduce personal injury from flying debris or accidental contact with the saw chain.
  

• Do not operate a chain saw, on a ladder, from a rooftop, or any unstable support. Operation of a chain saw in this manner could result in serious personal injury.
  
• Do not operate a chain saw in a tree unless you have been specifically trained to do so. Operation of a chain saw in a tree without proper training could increase the risk of serious personal injury.
  

• Always keep proper footing and operate the chain saw only when standing on fixed, secure and level surface. Slippery or unstable surfaces may cause a loss of balance or control of the chain saw.
  
• When cutting a limb that is under tension, be alert for spring back. When the tension in the wood fibres is released, the spring loaded limb may strike the operator and/or throw the chain saw out of control.
  
• Use extreme caution when cutting brush and saplings. The slender material may catch the saw chain and be whipped toward you or pull you off balance.
  
• Carry the chain saw by the front handle with the chain saw switched off and away from your body. When transporting or storing the chain saw, always fit the guide bar cover. Proper handling of the chain saw will reduce the likelihood of accidental contact with the moving saw chain.
  
• Follow instructions for lubricating, chain tensioning and changing the bar and chain. Improperly tensioned or lubricated chain may either break or increase the chance for kickback.
  
• Cut wood only. Do not use chain saw for purposes not intended. For example: do not use chain saw for cutting metal, plastic, masonry or non-wood building materials. Use of the chain saw for operations different than intended could result in a hazardous situation.
  

• Do not attempt to fell a tree until you have an understanding of the risks and how to avoid them. Serious injury could occur to the operator or bystanders while felling a tree.
  

• Follow all instructions when clearing jammed material, storing or servicing the chain saw. Make sure the switch is off and the battery pack is removed. Unexpected actuation of the chain saw while clearing jammed material or servicing may result in serious personal injury.
  

Causes and operator prevention of kickback:Kickback may occur when the nose or tip of the guide bar touches an object, or when the wood closes in and pinches the saw chain in the cut.
Tip contact in some cases may cause a sudden reverse reaction, kicking the guide bar up and back towards the operator.
Pinching the saw chain along the top of the guide bar may push the guide bar rapidly back towards the operator.
Either of these reactions may cause you to lose control of the saw which could result in serious personal injury. Do not rely exclusively upon the safety devices built into your saw. As a chain saw user, you should take several steps to keep your cutting jobs free from accident or injury.
Kickback is the result of chain saw misuse and/or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given below:

• Maintain a firm grip, with thumbs and fingers encircling the chain saw handles, with both hands on the saw and position your body and arm to allow you to resist kickback forces. Kickback forces can be controlled by the operator, if proper precautions are taken. Do not let go of the chain saw.
  
• Do not overreach and do not cut above shoulder height. This helps prevent unintended tip contact and enables better control of the chain saw in unexpected situations.
  
• Only use replacement guide bars and saw chains specified by the manufacturer. Incorrect replacement guide bars and saw chains may cause chain breakage and/or kickback.
  
• Follow the manufacturer’s sharpening and maintenance instructions for the saw chain. Decreasing the depth gauge height can lead to increased kickback.
  

Additional safety instructions

• Keep everyone else and animals clear of your work area. When you are felling a tree, keep everyone else and animals at a safe distance from the tree. The distance should be at least twice the height of the tree to be felled. Adhere to this precaution, but have at least one person within hailing distance outside this area. If there is no-one within hailing distance outside this area, there will be on-one available to provide assistance in an emergency.
  
• Use the product and accessories only when they are in perfect working order.
  
• Never tamper with or modify the product or accessories in any way.
  
• Use the chainsaw only with the chain bars and saw chains approved by Hilti .
  
• Risk of injury by falling tools and/or accessories. Before starting work, check that the battery and installed accessories are secure.
  
• Keep the air vents clear at all times. Risk of burn injuries due to blocked air vents!
  
• Switch the chainsaw on only when you have brought it close to the workpiece. The saw chain must be free; make sure it cannot touch you or any object.
  
• Wait until the product has come to a complete stop before you lay it down.
  
• As long as a battery is inserted, although it makes no noise a cordless chainsaw is always ready for use. Do not be lulled into a false sense of security and always be aware of possible hazards such as unintentional starting. Always apply the chain brake before you set the chainsaw down.
  
• Wear protective gloves when changing the chain bar and/or the saw chain. Touching the chain bar and/or the saw chain can lead to cuts and burns.
  
• Do not touch rotating parts – risk of injury!
  
• You and any other persons in the vicinity must wear eye protection, a hard hat, hearing protection, protective gloves and light respiratory protection while the product is in use. Comply with your local regulations on personal protective equipment when using a chainsaw. Hilti recommends in addition wearing anti-slip safety boots with cut protection, long chainsaw protection pants, a snug-fitting top with long sleeves, gloves with cut protection and a mesh face shield. Suitable eye protection is tested to the EN 166 standard or in accordance with national regulations and available, appropriately marked, through commercial outlets.
  
• Heavy protective clothing can lead to the user experiencing premature fatigue and heatstroke. In hot and humid weather undertake physically demanding work in the early morning or late afternoon hours, when the temperatures are cooler.
  
• Dust produced by grinding, sanding, cutting and drilling can contain dangerous chemicals. Some examples are: lead or lead-based paints; brick, concrete and other masonry products, natural stone and other products containing silicates; certain types of wood, such as oak, beech and chemically treated wood; asbestos or materials that contain asbestos. Determine the exposure of the operator and bystanders by means of the hazard classification of the materials to be worked. Implement the necessary measures to restrict exposure to a safe level, for example by the use of a dust collection system or by the wearing of suitable respiratory protection. The general measures for reducing exposure include:
  
• working in an area that is well ventilated,
  
• avoidance of prolonged contact with dust,
  
• directing dust away from the face and body,
  
• wearing protective clothing and washing exposed areas of the skin with water and soap.
  
• Take frequent breaks and do physical exercises to improve the blood circulation in your fingers. High vibration during long periods of work can lead to disorders of the blood vessels and nervous system in the fingers, hands and wrists.
  
• Never cut into unknown workpieces and keep the line of cut above and below the workpiece free of obstacles.
  
• Before beginning work, check the working area for concealed electric cables or gas and water pipes. External metal parts of the product could give you an electric shock or cause an explosion if you accidentally damage an electric cable or a gas or water pipe.
  
• The saw chain becomes hot when in use and stretches. If the chain does not have sufficient lubrication and is not tensioned at regular intervals, it can jump off the chain bar or break. This can lead to serious injury and damage to property.
  
• Use chainsaw chain oil and while cutting work is in progress, at regular intervals check the fill level in the oil reservoir. Top up with oil before the oil reservoir is completely empty. Set the chainsaw on a level surface. If oil is no longer visible in the window of the oil reservoir, you must refill the reservoir with chainsaw chain oil.
  
• Before and during cutting work, regularly check the chain tension and re-tension the chain when necessary.
  
• Switch the product off and remove the battery before performing check steps!
  
• When you want to fell a tree, follow the instructions on felling a tree in these operating instructions. Never fell a tree without first preparing an escape route.
  
• Do not saw vines, undergrowth or thin, flexible twigs.
  
• If the moving saw chain hits a stone or some other hard object, sparks can be produced which, under certain circumstances, can ignite flammable materials. Flammable materials also include dry vegetation and scrub, especially in hot and dry weather conditions. Do not use the chainsaw if there is a risk of fires or wildfires.
  

Requirements to be met by users

• Users without instruction cannot recognize and cannot assess the hazards associated with the chainsaw. The users must be completely familiar with the content of these operating instructions.
  
• The user must be rested and physically and mentally fit.
  
• If you are working with a chainsaw for the first time, practice handling the chainsaw by sawing round lumber on a sawhorse.
  
• Hilti recommends obtaining training in how to handle chainsaws before you use a chainsaw for the first time. Comply with national, local and jobsite-specific health and safety requirements.
  

Careful handling and use of batteries

• Comply with the following safety instructions for the safe handling and use of Li-ion batteries. Failure to comply can lead to skin irritation, severe corrosive injury, chemical burns, fire and/or explosion.
  
• Use only batteries that are in perfect working order.
  
• Treat batteries with care in order to avoid damage and prevent leakage of fluids that are extremely harmful to health!
  
• Do not under any circumstances modify or tamper with batteries!
  
• Do not disassemble, crush or incinerate batteries and do not subject them to temperatures over 80 °C (176 °F).
  
• Never use or charge a battery that has suffered an impact or been damaged in any other way. Check your batteries regularly for signs of damage.
  
• Never use recycled or repaired batteries.
  
• Never use the battery or a battery-operated power tool as a striking tool.
  
• Never expose batteries to the direct rays of the sun, elevated temperature, sparking, or open flame. This can lead to explosions.
  
• Do not touch the battery poles with your fingers, tools, jewelry, or other electrically conductive objects. This can damage the battery and also cause material damage and personal injury.
  
• Keep batteries away from rain, moisture and liquids. Penetrating moisture can cause short circuits, electric shock, burns, fire and explosions.
  
• Use only chargers and power tools approved for the specific battery type. Read and follow the relevant operating instructions.
  
• Do not use or store the battery in explosive environments.
  
• If the battery is too hot to touch, it may be defective. Put the battery in a place where it is clearly visible and where there is no risk of fire, at an adequate distance from flammable materials. Allow the battery to cool down. If it is still too hot to touch after an hour, the battery is faulty. Consult Hilti Service or read the document entitled "Instructions on safety and use for Hilti Li-ion batteries".
  
  Observe the special guidelines applicable to the transport, storage and use of lithium-ion batteries.
  Read the instructions on safety and use of Hilti Li-ion batteries that you can access by scanning the QR code at the end of these operating instructions.
  

Product overview

1. Rear hand guard
   
2. Rear grip
   
3. Status LED
   
4. Front grip
   
5. Front hand guard and chain brake
   
6. Direction-of-travel arrow, saw chain
   
7. Chain bar
   
8. Saw chain
   
9. Nuts, chain sprocket cover
   
10. Chain sprocket cover
    
11. Screw, chain tensioner
    
12. Chain catcher
    
13. Pin, tensioning slider
    
14. Chain sprocket
    
15. Switch-on interlock
    
16. On/off switch
    
17. Window, oil reservoir
    
18. Cap, oil reservoir
    
19. Bumper spike bar
    
20. Chain guard
    
21. Keys
    
22. Battery status indicator
    
23. Battery release button
    

Intended use

The product described is a chainsaw. The chainsaw is designed for sawing wood (e.g. beams, structural timber, posts) and for limbing and felling trees of small to medium tree trunk diameter.

• For this product, use only Hilti Nuron lithium-ion batteries of the B 22 series. For optimum performance, Hilti recommends the batteries stated in this table for this product.
  

• For these batteries, use only Hilti chargers of the type series stated in this table.
  

Items supplied

Chainsaw, chain bar, saw chain, wrench, operating instructions
Other system products approved for use with this product can be found at your local Hilti Store or at: www.hilti.group

Indications by status LED

The product has a status LED that indicates the current status of the chainsaw.

Status	Meaning
The status LED shows steady green.	The on / off switch is pressed, the saw chain is running.
The status LED flashes yellow.	The chainsaw is ready for use, the on / off switch is not pressed.
The status LED shows steady yellow.	The chain brake is applied. Release the chain brake to use the chainsaw.
The status LED shows steady red.	The chain brake was applied during operation. Release the chain brake to use the chainsaw.
The status LED flashes red.	The chainsaw is overloaded. Do not apply excessive pressure to the chain bar. Switch the chainsaw off and then on again. If the status LED still flashes red, contact Hilti Service.

Status indicators of the Li‑ion battery

Hilti Nuron Li-ion batteries can indicate state of charge, fault messages and the battery's state of health.

Indicators for state of charge and fault messages

Short-press the release button of the battery to get whichever of the following status indications is applicable at the time.
State of charge and, if applicable, faults are indicated constantly as long as the connected product is switched on.

Status	Meaning
Four (4) LEDs show constantly green	State of charge: 100 % to 71 %
Three (3) LEDs show constantly green	State of charge: 70 % to 51 %
Two (2) LEDs show constantly green	State of charge: 50 % to 26 %
One (1) LED shows constantly green	State of charge: 25 % to 10 %
One (1) LED slow-flashes green	State of charge: < 10 %
One (1) LED quick-flashes green	The Li-ion battery is completely discharged. Recharge the battery. If the LED again starts quick-flashing after the battery has been charged, consult Hilti Service.
One (1) LED quick-flashes yellow	The Li-ion battery or the product in which it is inserted is overloaded, too hot or too cold, or experiencing some other fault. Bring the product and the battery to the recommended working temperature and do not overload the product when it is in use. If the message persists, consult Hilti Service.
One (1) LED shows yellow	The Li-ion battery and the product in which it is inserted are not compatible. Consult Hilti Service.
One (1) LED quick-flashes red	The Li-ion battery is locked and cannot be used. Consult Hilti Service.

Indicators showing the battery's state of health

To check the battery's state of health, press the release button and hold it down for longer than three seconds. The system does not detect a potential malfunction of the battery due to misuse, for example battery dropped or pierced, external heat damage, etc.

Status	Meaning
All LEDs show in sequence, followed by one (1) LED showing constantly green.	The battery can remain in use.
All LEDs show in sequence, followed by one (1) LED quick-flashing yellow.	The check to ascertain the battery's state of health did not complete. Repeat the procedure, or consult Hilti Service.
All LEDs show in sequence, followed by one (1) LED showing constantly red.	If a connected product can still be used, the remaining battery capacity is below 50 %. If a connected product can no longer be used, the battery has reached the end of its useful life and has to be replaced. Consult Hilti Service.

Product information

Product generation	01
Rated voltage	21.6 V
Weight	4.0 kg (8.8 lb) Without battery and without chain bar, saw chain, chainsaw chain oil, chain guard
Maximum capacity, oil reservoir	210 mℓ (7.1 fl. ozUS)
Minimum groove depth, chain bar	9 mm (0.4 in)
Chain pitch	0.375 in / 9.52 mm
Chain speed	21 m/s (69 ft/s)
Ambient temperature for operation	−17 ℃ … 60 ℃ (1 ℉ … 140 ℉)
Storage temperature	−20 ℃ … 70 ℃ (−4 ℉ … 158 ℉)

Battery

Battery operating voltage	21.6 V
Weight, battery	See the section headed "Intended use"
Ambient temperature for operation	−17 ℃ … 60 ℃ (1 ℉ … 140 ℉)
Storage temperature	−20 ℃ … 40 ℃ (−4 ℉ … 104 ℉)
Battery charging starting temperature	−10 ℃ … 45 ℃ (14 ℉ … 113 ℉)

Combinations of chain bars and saw chains

Chain bar	Saw chain	Chain pitch	Drive link thickness	Number of drive links
Hilti SCN 60 1.1 16″	Hilti SCN 60 1.1 cc	.375″ / 9.52 mm / 3⁄8″	1.1 mm (0.043")	56
Hilti SCN 60 1.3 16″	Hilti SCN 60 1.3 cc	.375″ / 9.52 mm / 3⁄8″	1.3 mm (0.050")	56

Charging the battery

1. Before charging the battery, read the operating instructions for the charger.
   
2. Make sure that the contacts on the battery and the contacts on the charger are clean and dry.
   
3. Use an approved charger to charge the battery.
   

Inserting the battery

1. Charge the battery fully before using it for the first time.
   
2. Push the battery into the product until it engages with an audible click.
   
3. Check that the battery is seated securely.
   

Removing the battery

1. Press the battery release button.
   
2. Remove the battery from the product.
   

Installing chain bar and saw chain

1. Loosen the nuts of the chain sprocket cover (1) .
   
2. Remove the chain sprocket cover (2) .
   
3. Turn the screw of the chain tensioner (3) counter-clockwise until the tensioning slider (4) is all the way to the left against the housing.
   

4. Loop the saw chain over the chain bar such that along the top of the chain bar, the arrows on the connecting links of the saw chain point in the direction of travel.
   
   • The orientation of the chain bar is irrelevant. The lettering can be upside down.
     
5. Set the chain bar with saw chain on the chainsaw such that the studs (5) are seated in the slot in the chain bar.
   
   • The pin of the tensioning slider must be engaged in the hole in the chain bar (6) and the drive links of the saw chain must be in mesh with the chain sprocket (7) .
     
6. If necessary, release the chain brake.
   
7. Turn the screw of the chain tensioner (3) clockwise until the saw chain is seated on the chain bar along the entire length.
   
   • Make sure that all the drive links are in the groove in the chain bar.
     
8. Position the chain sprocket cover flush on the chainsaw.
   
   • Check that the direction-of-travel arrows of the saw chain point in the same direction as the direction-of-travel arrow on the chain sprocket cover. If the arrows do not point in the same direction, go back to step 4 and correct the direction of travel of the saw chain.
     
9. Tighten the nuts of the chain sprocket cover until they are hand-tight.
   
10. Check that the chain sprocket cover is seated snugly and securely.
    
11. Check the chain lubrication before using the chainsaw. Run the chainsaw until chainsaw chain oil is thrown off.
    
    New saw chains stretch when used for the first time. Re-tension new saw chains after the first 2 minutes of use.
    

Tensioning saw chain

1. Loosen the nuts of the chain sprocket cover (1) .
   
2. If necessary, release the chain brake.
   
3. Lift the chain bar at the nose and turn the screw of the chain tensioner (2) clockwise or counter-clockwise until the saw chain is ideally tensioned.
   
4. The tension of the saw chain is ideal when:
   
   • The distance a between the chain bar and the outer chain links midway along the chain bar is 1 mm to 2 mm (0.04 in to 0.08 in).
     
   • The saw chain can be pulled along the chain bar with two fingers and little effort.
     
5. Keep holding the chain bar up at the nose and tighten the nuts of the chain sprocket cover.
   
6. Finally, re-check distance a .
   
   • If distance a is not 1 mm to 2 mm (0.04 in to 0.08 in), repeat the operation.
     

Pouring in chainsaw chain oil

Chainsaw chain oil lubricates and cools the moving saw chain.
Use only biodegradable, plant-based chainsaw chain oil formulated specifically for the purpose.
When the chainsaw is filled with chainsaw chain oil for the first time, it takes a few seconds for the chainsaw chain oil to be transported from the oil reservoir through the oil channel to the chain bar and the saw chain. Before using the chainsaw for the first time, check the chain lubrication. Run the chainsaw until chainsaw chain oil is thrown off.
At regular intervals, check the fill level of the oil reservoir. Refill the reservoir with oil at the latest when oil is no longer visible in the semi-transparent window of the oil reservoir. Never allow the oil reservoir to become completely empty.

1. Lay the chainsaw on a flat surface, with the cap of the oil reservoir facing up.
   
2. Clean the area around the cap of the oil reservoir with a damp cloth.
   
3. Flip open the bow of the cap.
   
4. Twist the cap of the oil reservoir all the way counter-clockwise.
   
5. Remove the cap of the oil reservoir.
   
6. Pour in the chainsaw chain oil.
   
   • Pour in oil until the oil reservoir is full, but not to the brim. Leave approx. 12 mm (1⁄2″) empty.
     
7. Set the cap of the oil reservoir in position, press the cap of the oil reservoir down and twist the cap clockwise until it engages with an audible click.
   
8. Check that the cap is secure.
   
   • If the cap is secure, flip the bow down.
     
   • If the cap is not secure, open the cap and re-install it.
     

Fall arrest

As drop arrester for this product, use only the Hilti tool tether #2261971.

• Use the loop to secure the tool tether to the product as shown in the illustration. Check that it holds securely.
  
• Secure the carabiner to a load-bearing structure. Check that the carabiner holds securely.
  
  Comply with the operating instructions of the Hilti tool tether.
  

Holding and controlling chainsaw

• Hold and control the chainsaw with your left hand on the front grip and your right hand on the rear grip. The thumb of each hand must encircle the corresponding grip.
  
• Always position yourself to the side of the chainsaw. Never bring the saw chain or chain bar into line with your body.
  
• Stand with both feet firmly on the ground and position your body to resist kickback forces.
  
• Keep your left arm with the elbow in an outstretched position so as better to absorb a kickback.
  

Kickback Contact with an object at the top part of the chain bar nose can cause the saw chain to dig into the object, momentarily bringing the saw chain to a stop. The result is a lightning-fast opposite reaction in which the chain bar is flung up and toward the operator.
The chain bar can also be flung back toward the operator if the saw chain is pinched at the top end of the chain bar, for example if the wood closes on the cut.
The risk of a kickback can be reduced by the following measures:

• Do not work with the area around the top quarter of the nose of the chain bar.
  
• Work with a saw chain that is correctly sharpened and correctly tensioned.
  
• Always make sure that the cut opens in the workpiece as you saw.
  

Chain pull

When a cut is made with the underside of the chain bar, the chainsaw is pulled away from the user.
If the moving saw chain hits a hard object and is abruptly slowed, the chainsaw might be suddenly jerked forcibly away from the user.
Recoil

When a cut is made with the top of the chain bar, the chainsaw is pushed toward the user.
If the moving saw chain hits a hard object and is abruptly slowed, the chainsaw might be suddenly jerked forcibly toward the user

Applying / releasing chain brake

The chainsaw has a chain brake. The chain brake reduces the risk of accident in the event of a kickback, but it cannot prevent accidents in all cases. Follow the instructions for holding and controlling the chainsaw and familiarize yourself with the dangers of a kickback.
If a kickback of sufficient severity occurs, the chain brake is automatically applied by the front hand guard's mass moment of inertia. Regularly check operation and automatic application of the chain brake to ensure protection.

1. To apply the chain brake, push the front hand guard forward away from the front grip.
   
   • The front hand guard engages with an audible click, the pointer is at the symbol
     
2. To release the chain brake, pull the front hand guard back toward the front grip.
   
   • The front hand guard engages with an audible click, the pointer is at the symbol
     

Switching on

1. Apply the chain brake.
   
2. Short-press the switch-on interlock or the on / off switch.
   
   • The chainsaw is activated, the status LED shows steady yellow.
     
3. Release the chain brake.
   
   • The chainsaw is ready for use, the status LED flashes yellow.
     
4. Press and hold down the switch-on interlock.
   
5. Press the on/off switch.
   
   • The chainsaw runs.
     
   • The status LED shows steady green.
     
6. Keep the on / off switch pressed down, release the switch-on interlock and reposition your thumb securely around the rear grip.
   
   If no button is pressed within two minutes after switch-off, the product deactivates itself automatically. If the product is to be used again within this period of time it does not have to be reactivated.
   

Switching off

1. Release the on/off switch.
   
   • The saw chain is braked and the chainsaw stops.
     
2. Apply the chain brake before you set the chainsaw down.
   
   If no button is pressed within two minutes, the product deactivates itself automatically.
   

Sawing

Conduct all sawing operations in compliance with the following instructions.

1. Guide the chain bar with the chain running at full speed into the cut such that the chain bar does not tilt.
   
2. Engage the bumper spike bar in the wood and use it as a fulcrum.
   
3. Keep the saw running at full speed throughout the entire cutting operation.
   
4. Allow the saw chain to make the cut by itself and apply only light pressure to the chain bar. Excessive pressure can damage the saw chain or the chainsaw and lead to kickback.
   
5. Repeatedly shift the bumper spike bar to a new point of engagement until the cut is completed.
   
6. Take the weight of the chainsaw as it approaches the end of the cut.
   

Felling a tree

A safe felling technique for trees is described in these operating instructions. An ideally grown, straight and healthy tree is assumed. In reality a tree to be felled might be leaning (forward leaner, backward leaner), be in tension, be damaged, hollow or rotten or have any of many other peculiarities. Such less-than-ideal trees might drop in a direction other than that intended by the feller, splinter unexpectedly during the felling operation, or evince any of many other unexpected reactions. If you have not been trained in tree felling and want to fell a less-than-ideal tree, Hilti urgently recommends having the work carried out by a trained specialist.
Use a battery of sufficient capacity for the extent of work involved in the operation and make sure that the battery is fully charged. In this way you can avoid having to interrupt work at a critical point.
Determining direction of fall and escape route

• Determine the tree's direction of fall (A) . The direction of fall depends on the following factors:
  
• The natural lean of the tree. Never attempt to fell a tree in a direction opposite to its natural lean and thus its natural direction of fall.
  
• Wind direction and wind strength. Strong wind influences the tree's direction of fall, rendering it uncontrollable. Cease felling operations if the wind is strong.
  
• Sloping ground. Whenever possible the user should always stand uphill and the tree should always fall downhill.
  
• Obstructions and other trees. The tree's direction of fall must be completely free of all obstructions.
  
• Depending on the direction of fall, determine your escape route (B) .
  
• Escape route means the path of exit along which the feller retreats from the falling tree.
  
• The escape route must satisfy the following requirements:
  
• The escape route must lead to the rear and diagonally at an angle of 45° away from the direction of fall.
  
• The escape route must be completely cleared of all obstructions.
  
• The escape route must afford a clear view of the tree crown.
  
• On sloping ground the escape route should always be parallel with the slope.
  

Basics of the felling cut

• (C) Felling notch
  The felling notch determines the direction of fall.
  
• (D) Felling hinge
  The felling hinge guides the tree down to the ground. The felling hinge is 1/10 of the tree trunk diameter in width.
  
• (E) Felling cut
  The felling cut saws through the tree trunk, except for the felling hinge and the backstrap. The felling cut is made 1/10 of the tree trunk diameter but at least 3 cm (1.2 in) above the horizontal bottom cut of the felling notch.
  
• (F) Backstrap
  The backstrap supports the tree and keeps it from falling prematurely. The backstrap is 1/10 to 1/5 of the tree trunk diameter in width.
  
• (G) Tree trunk diameter
  The tree trunk diameter is measured at approximately breast height.
  

Preparing work area at the tree trunk

• Remove all obstructions around and in the tree trunk. This includes dirt, stones, loose bark, nails, cables, etc.
  
• Remove all obstructing branches and twigs from the bottom part of the tree you are going to fell and from your workplace.
  
• If the tree trunk has large root flares, cut into the root flares horizontally first and then vertically and remove the flares.
  

Sawing a felling notchThe felling notch determines the direction in which the tree should fall. Comply with country-specific regulations applicable to cutting the felling notch.
Make the felling notch close to the ground and perpendicular to the direction of fall.

• Saw the horizontal bottom cut. The cutting depth must be 1/5 to max. 1/3 of the tree trunk diameter.
  
• The bottom cut should always be made first so that no weight is shifted on to the chain bar and the saw chain.
  
• Make the top cut at an angle of 45° to the bottom cut.
  
• Remove the wedge-from the felling notch.
  
• If the wood is healthy and long-fibered, make a shallow side cut at each side.
  
• The shallow side cuts must be level with the bottom of the felling notch and 1/10 of the tree trunk diameter in width.
  
• The shallow side cuts prevent fiber ripping and side scarring of the tree trunk.
  

Bore cuttingDo not start the felling cut at the rear of the direction of fall. This cuts through the backstrap and the tree can fall sooner than planned or trap the chain bar during felling.
The bore cutting technique means that the backstrap is intact until the felling cut has been completed and it is not cut through until the last step. In this way you have more control over the timing of the tree's felling and you avoid kickback, injuries and/or damage to the chain bar and/or the saw chain.

• Apply the chain bar with the underside of the nose and with the saw running at full speed (1) .
  
• Make a cut in the tree trunk to a depth twice the width of the chain bar.
  
• Pivot to the bore-cut position (2) .
  
• Bore to the appropriate length of the chain bar (3) .
  
• Take care not to damage the felling hinge.
  

Conditions : Small tree trunk diameter
Felling a tree with small tree trunk diameterSmall tree trunk diameter means that the tree trunk diameter is less than the length of the usable chain bar.

• Cut the felling notch.
  
• Issue a warning hail.
  
• Start the bore cut.
  
• Engage the bumper spike bar behind the wood of the felling hinge and use it as a fulcrum.
  
• Initially clear out the felling cut in the direction of the felling hinge (1) .
  
• Take care not to damage the felling hinge.
  
• Then clear out the felling cut in the direction of the backstrap (2) .
  
• Take care not to damage the backstrap.
  
WARNING
Risk of injury by kickback, recoil or chain pull, or by breakage of the saw chain. If the nose of the chain bar touches the felling wedge, a kickback can occur. If the felling wedge is made of steel, the saw chain can be damaged and break.

Do not use steel felling wedges; use only felling wedges made of wood or plastic.

Take care not to saw into the felling wedge.

• Insert a felling wedge (3) .
  
• The felling wedge must be appropriate to the tree trunk diameter and the width of the felling cut.
  
• Issue a warning hail.
  
• With arms outstretched, cut through the backstrap from outside the tree trunk and horizontally in the plane of the felling cut.
  
• When the tree starts to fall, immediately switch off the chainsaw and set it down.
  
• Retreat to safety along your predetermined escape route and observe the crown of the tree. React accordingly if the tree does not fall in the planned direction.
  

Conditions : Medium tree trunk diameter
Felling a tree with medium tree trunk diameterMedium tree trunk diameter means that the tree trunk diameter is less than twice the length of the usable chain bar.

• Issue a warning hail.
  
• Engage the bumper spike bar at the rear of the tree trunk and use it as a fulcrum.
  
• Engage the bumper spike bar far enough back so as not to damage the felling hinge.
  
• Bore the chain bar at full speed into the felling cut and pivot the chain bar as far as possible through the tree trunk (1) .
  
• Clear out the felling cut in the direction of the felling hinge (2) .
  
• Take care not to damage the felling hinge.
  
• Clear out the felling cut in the direction of the backstrap (3) .
  
• Take care not to damage the backstrap.
  
• Bore cut from the opposite side of the tree trunk, level with the felling cut.
  
• Clear out the felling cut in the direction of the felling hinge (4) .
  
• Take care not to damage the felling hinge.
  
• Clear out the felling cut in the direction of the backstrap (5) .
  
• Take care not to damage the backstrap.
  
WARNING
Risk of injury by kickback, recoil or chain pull, or by breakage of the saw chain. If the nose of the chain bar touches the felling wedge, a kickback can occur. If the felling wedge is made of steel, the saw chain can be damaged and break.

Do not use steel felling wedges; use only felling wedges made of wood or plastic.

Take care not to saw into the felling wedge.

• Insert a felling wedge (6) .
  
• The felling wedge must be appropriate to the tree trunk diameter and the width of the felling cut.
  
• Issue a warning hail.
  
• With arms outstretched, cut through the backstrap from outside the tree trunk and horizontally in the plane of the felling cut.
  
• When the tree starts to fall, immediately switch off the chainsaw and set it down.
  
• Retreat to safety along your predetermined escape route and observe the crown of the tree. React accordingly if the tree does not fall in the planned direction.
  

Limbing

Limbing is the operation of removing branches from a felled tree.

1. Leave the larger supporting branches underneath the tree, so that the tree does not drop to the ground or roll away during the cutting operation.
   
   • Remove large supporting branches only after bucking the tree trunk.
     
2. When limbing, keep the tree trunk between you and the chainsaw. Cut from the side of the tree opposite the side with the branch you are removing.
   
3. Support the chainsaw on the tree trunk.
   
4. Using a levering action, press the chain bar against the branch and saw through the branch with the top of the chain bar.
   
5. Saw each branch on its own and clear the work area of sawed-off branches at frequent intervals.
   

Bucking

• Always cut only one tree trunk at a time and secure the tree trunk so that it cannot roll away. If the tree trunk is lying on a slope, always stand on the uphill side of the tree trunk when you are bucking. Do not position yourself on the tree trunk.
  
• Whenever possible, lift tree trunks off the ground and saw the tree trunks on a sawhorse or a comparable stand. If the tree trunk cannot be lifted, follow the instructions below as applicable to the situation in order to avoid kickback:
  
• If the tree trunk is lying completely flat on the ground and cannot be lifted, use the underside of the chain bar to make a cut down from above through 2⁄3 of the diameter (1) . Roll the tree trunk 180° (2) and, again from above, cut down through the remaining one third of the tree trunk's diameter (3) .
  Also use this procedure when you are uncertain which direction the tree will move in after the cut is made.
  
• If the tree trunk is supported at only one end and the other end is unsupported, use the top of the chain bar and first cut up from below through 1⁄3 of the diameter (4) . Then use the underside of the chain bar and cut down from above through the remaining 2⁄3 of the tree trunk's diameter (5) .
  
• If the tree trunk is supported at both ends only, use the underside of the chain bar and first cut down from above through 1⁄3 of the diameter (6) . Then use the top of the chain bar and cut up from below through the remaining 2⁄3 of the tree trunk's diameter (7) .
  

Pruning

Pruning is the operation of removing branches from a living tree.
When pruning, it is important not to begin by directly making the final cut at the remaining branch collar or at the tree trunk. First cut off the branch farther along, to reduce the weight. This prevents the bark from ripping at the remaining branch collar or the tree trunk. If the bark rips the tree cannot heal the wound and remains susceptible to attack by pathogens.

1. Do not make cuts above shoulder height and do not work off a ladder.
   
2. First make a cut up from below into the branch s short distance away from the branch collar/tree trunk (1) . The cutting depth should be 1⁄3 of the diameter.
   
3. Now make the cut from above down through the branch just slightly farther out from the branch collar/tree trunk (2) .
   
4. Now cut off the branch stump close to the branch collar/tree trunk so that the bark can grow back and close the wound (3) .
   

Checking chain brake

Regularly check operation and automatic application of the chain brake.
Make sure that the front hand guard shows no signs of damage and that it can be moved easily and without the application of increased force.

Checking operation of chain brake

1. Apply the chain brake.
   
2. Try to pull the saw chain by hand along the chain bar.
   Result 1 / 2The saw chain cannot be moved.
   The chain brake is working.
   Result 2 / 2The saw chain can be pulled along the chain bar.
   
   • The chain brake is faulty. Do not continue to use the product and consult Hilti Service.
     

Checking automatic application of the chain brake

1. Install the chain guard.
   
2. Release the chain brake.
   
3. With both hands, hold the chainsaw approx. 30 cm (12 in) above a wooden surface.
   
4. Let go of the front grip so that the chainsaw drops with the tip of the chain bar falling on to the wooden surface.
   Result 1 / 2The chain brake is applied by the mass moment of inertia.
   Automatic application of the chain brake is working.
   Result 2 / 2The chain brake is not applied by the mass moment of inertia.
   
   • The mechanism of the chain brake is jammed or faulty. Do not continue to use the product and consult Hilti Service.
     

Checking chain lubrication

Always check the chain lubrication before using the chainsaw. Before first use and after a change of chain bar and/or saw chain, it may take a few seconds before chainsaw chain oil is thrown off.

1. Insert the battery.
   
2. Hold the chainsaw with the nose of the chain bar positioned close to a light-colored surface, without touching the surface.
   
3. Switch the chainsaw on.
   Result 1 / 3Chainsaw chain oil is thrown off and is visible on the light-colored surface.
   The chain lubrication is working. The chainsaw can remain in use.
   Result 2 / 3No chainsaw chain oil is visible on the light-colored surface.
   
   • Remove the battery.
     
   • Fill the oil reservoir.
     
   • Clean the area underneath the chain sprocket cover, the chain bar and the oil channel.
     
   • Recheck the chain lubrication.
     
   Result 3 / 3After cleaning and filling of the reservoir with chainsaw chain oil, chainsaw chain oil from the chain is still not visible on the light-colored surface.
   
   • Do not continue to use the product and consult Hilti Service.
     

Cleaning chain bar and saw chain

1. Loosen the nuts of the chain sprocket cover.
   
2. Remove the chain sprocket cover.
   
3. Turn the screw of the chain tensioner counter-clockwise until the tensioning slider is all the way to the left against the housing.
   
   • The saw chain is slack.
     
4. Remove the chain bar and the saw chain.
   
5. Clean the oil outlet channel in the chainsaw with a paintbrush, a soft brush or resin solvent.
   
6. Clean the saw chain and the groove in the chain bar with a paintbrush, a soft brush or resin solvent.
   
7. Clean the side flats of the chain bar with a slightly damp cloth or with resin solvent.
   
8. Install the chain bar and the saw chain.
   

Maintaining chain bar

Check the chain bar regularly for wear and damage.
Replace the chain bar if it exhibits the following:

• The chain bar is bent
  
• The groove has cracks or other damage
  
• The groove is constricted and catches the saw chain
  
• The groove is widened and the saw chain can be tilted to the side
  
• Groove depth is less than the specified minimum groove depth, see the technical data
  

A burr can form on the outside edge of the chain bar.

• Remove the burr with a flat file.
  
• If uncertainties arise or the chain bar is damaged, consult Hilti Service.
  

Sharpening saw chain

1. Tension the saw chain.
   
2. File each cutting tooth in turn with a round file. Guide the round file perpendicular to the chain bar from the inside to the outside.
   
   • The round file must be of the correct diameter to match the pitch of the saw chain.
     
   • Adhere to the sharpening angle of 30°.
     
3. Use a flat file to file the rakers flush with a depth gage and parallel with the wear mark.