Safe use of Stihl Saws

This presentation covers the safety instructions for the Husqvarna K 770, K 770 OilGuard, K 770 Rescue and K 770 SmartGuard in English. It is recommended that you have a copy of the manufacturer’s instructions to follow along with.

The Husqvarna, K 770, K 770 OilGuard, K 770 Rescue and K 770 SmartGuard power cutters are portable handheld cut-off machines powered by 2-stroke combustion engines.

The product is used to cut hard materials as concrete, masonry, stone and steel. Do not use the product for other tasks. The product must only be used by professional operators with experience.

Take a moment to look through the first few pages of the manual which cover the product overview. Safety Instructions start on page 6.

General Safety Instructions

A power cutter is a dangerous tool if used carelessly or incorrectly and can cause serious injury or death. It is very important that you read and understand the contents of this operator’s manual. It is also recommended that first time operators also obtain practical instruction before using the product.

Do not do modifications to this product. Modifications that are not approved by the manufacturer, can cause serious injury or death.

Do not operate the product if it is possible that other persons have done modifications to the product.

Always use original accessories and spare parts. Accessories and spare parts that are not approved by the manufacturer, can cause serious injury or death.

Keep the product clean. Make sure that you can clearly read signs and decals.

Never allow children or other persons not trained in the use of the product to use or service it.

Do not let a person operate the product unless they read and understand the contents of the operator’s manual.

Only let approved persons operate the product.

This product produces an electromagnetic field during operation. This field can under some circumstances interfere with active or passive medical implants. To decrease the risk of serious injury or death, we recommend persons with medical implants to speak to their physician and the medical implant manufacturer before operating this product.

The information in this operator’s manual is never a substitute for professional skills and experience. If you are in a situation where you feel unsafe, stop and get expert advice. Speak to your servicing dealer. Do not try any task that you feel unsure of.

Safety instructions for operation

Before you use a power cutter, you must understand the effects of kickback and how to prevent them.

Do the safety checks, maintenance and servicing as given in this operator’s manual. Some maintenance and servicing must be done by an approved service center.

Do not use the product if it is defective.

Do not use the product if you are tired, ill, or under the influence of alcohol, drugs or medicine. These conditions can have an unwanted effect on your vision, alertness, coordination or judgment.

Do not start the product without the belt and the belt guard installed. The clutch can become loose and cause injury.

Sparks from the cutting blade can cause fire in flammable materials such as gasoline, gas, wood, clothes and dry grass.

Do not cut asbestos material.

Work area safety

The safety distance for the power cutter is 15 m/50 ft. Make sure that animals and bystanders are not in the work area.

Do not operate the product until the work area is clear and your feet and body are in a stable position.

Look out for persons, objects and situations that can prevent safe operation of the product.

Make sure that no persons or objects can come into contact with the cutting equipment or be hit by parts thrown by the blade.

Do not use the product in fog, rain, strong winds, cold weather, risk of lightning or other bad weather conditions. To use the product in bad weather can have a negative effect on your alertness. Bad weather can cause dangerous work conditions, such as slippery surfaces.

During operation of the product, make sure that no material can become loose and fall and cause injury to the operator.

Be very careful when you operate the product on a slope.

Keep the work area clean and bright.

Before you operate the product, find out if there are hidden hazards such as electrical cables, water, and gas pipes and flammable substances in the work area. If the product hits a hidden object, stop the engine immediately and examine the product and the object. Do not start to operate the product again until you know that it is safe to continue.

Before you cut into a drum, a pipe, or other container, make sure that it does not contain flammable or other material that can cause fire or explosion.

Vibration safety

During operation of the product, vibrations go from the product to the operator. Regular and frequent operation of the product can cause or increase the degree of injuries to the operator. Injuries can occur in fingers, hands, wrists, arms, shoulders, and/or nerves and blood supply or other body parts. The injuries can be debilitating and/or permanent, and can increase gradually during weeks, months or years. Possible injuries include damage to the blood circulation system, the nervous system, joints, and other body structures.

Symptoms can occur during operation of the product or at other times. If you have symptoms and continue to operate the product, the symptoms can increase or become permanent. If these or other symptoms occur, get medical aid. Numbness, loss of feeling, tingling, pricking, pain, burning, throbbing, stiffness, clumsiness, loss of strength, changes in skin color or condition.

Symptoms can increase in cold temperatures. Use warm clothing and keep your hands warm and dry when you operate the product in cold environments.

Do maintenance on and operate the product as given in the operator’s manual, to keep a correct vibration level.

The product has a vibration damping system that decreases the vibrations from the handles to the operator. Let the product do the work. Do not push the product with force. Hold the product at the handles lightly, but make sure that you control the product and operate it safely. Do not push the handles into the end stops more than necessary.

Keep your hands on the handle or handles only. Keep all other body parts away from the product.

Stop the product immediately if strong vibrations suddenly occurs. Do not continue the operation before the cause of the increased vibrations is removed.

To cut granite or hard concrete causes more vibration in the product than if you cut soft concrete. Cutting equipment that is blunt, defective, of incorrect type or incorrectly sharpened, increases the vibration level.

Exhaust fumes safety

The exhaust fumes from the engine contain carbon monoxide which is an odourless, poisonous and very dangerous gas. To breathe carbon monoxide can cause death. Because carbon monoxide is odourless and cannot be seen, it is not possible to sense it. A symptom of carbon monoxide poisoning is dizziness, but it is possible that a person becomes unconscious without warning if the quantity or concentration of carbon monoxide is sufficient.

Exhaust fumes also contain unburned hydrocarbons including benzene. Long-term inhalation can cause health problems.

Exhaust fumes that you can see or smell also contain carbon monoxide.

Do not use a combustion engine product indoors or in areas that do not have sufficient airflow.

Do not breathe the exhaust fumes.

Make sure that the airflow in the work area is sufficient. This is very important when you operate the product in trenches or other small work areas where exhaust fumes can easily collect.

Dust safety

Operation of the product can cause dust in the air. Dust can cause serious injury and permanent health problems. Silica dust is regulated as harmful by several authorities. These are examples of such health problems. The fatal lung diseases chronic bronchitis, silicosis and pulmonary fibrosis, Cancer, Birth defects, Skin inflammation

Use correct equipment to decrease the quantity of dust and fumes in the air and to decrease dust on work equipment, surfaces, clothing and body parts. Examples of controls are dust collection systems and water sprays to bind dust. Decrease dust at the source where possible. Make sure that the equipment is correctly installed and used and that regular maintenance is done.

Use approved respiratory protection. Make sure that the respiratory protection is applicable for the dangerous materials in the work area.

Make sure that the airflow is sufficient in the work area.

If it is possible, point the exhaust of the product where it cannot cause dust to go into the air.

Personal protective equipment

Always use approved personal protective equipment during operation. Personal protective equipment cannot eliminate the risk of injury but it will reduce the degree of injury if an accident does happen. Ask your servicing dealer for help in choosing the right equipment.

Use an approved protective helmet.

Use approved hearing protection. Long-term exposure to noise can result in permanent hearing impairment. Be aware of warning signals or shouts when you are wearing hearing protection. Always remove your hearing protection as soon as the engine stops.

Use approved eye protection to decrease the risk of injury from thrown objects. If you use a face shield then you must also wear approved protective goggles. Approved protective goggles must comply with standard EN 166. Visors must comply with standard EN 1731.

Use heavy duty gloves.

Use approved respiratory protection. The use of products such as cutters, grinders, drills, that sand or form material can generate dust and vapours which may contain hazardous chemicals. Check the nature of the material you intend to process and use appropriate breathing mask.

Use tight-fitting, heavy-duty and comfortable clothing that permits full freedom of movement. Cutting generates sparks that can ignite clothing. Husqvarna recommends that you wear flame-retardant cotton or heavy denim. Do not wear clothing made of material such as nylon, polyester or rayon. If ignited such material can melt and cling to the skin. Do not wear shorts.

Use boots with steel toe-cap and non-slip sole.

Always keep a first aid kit near.

Sparks can come from the muffler or the cutting blade. Always have a fire extinguishing available.

Safety devices on the product

Do not use a product with defective safety devices.

Do a check of the safety devices regularly. If the safety devices are defective, speak to your approved service agent.

Do not change the safety devices.

Do not use the product if protective plates, protective covers, safety switches or other protective devices are defective or not attached.

Throttle trigger lockout

The throttle trigger lockout prevents accidental operation of the throttle trigger. If you put your hand around the handle and push the throttle trigger lockout, it releases the throttle trigger. If you release the handle, the throttle trigger and the throttle trigger lockout move back to their initial positions. This function locks the throttle trigger at idle speed.

To do a check of the throttle trigger lockout

Make sure that the throttle trigger is locked at the idle position when the throttle trigger lockout is released.

Push the throttle trigger lockout and make sure that it goes back when you release it.

Make sure that the throttle trigger and throttle trigger lockout move freely and that the return springs operate correctly.

Start the product and apply full throttle.

Release the throttle control and make sure that the cutting blade stops and stays stationary.

If the cutting blade rotates at idle position, adjust the idle speed.