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0458-716-8621-E

10

English 

6 IMPORTANT SAFETY INSTRUCTIONS

– Read and follow the operating and use instructions 

in this manual for approved applications and 

recommended working techniques.

■ Improper use could result in personal injury or property 

damage, including damage to the chain saw.

– Use the chain saw, battery and charger only as 

described in this manual.

– Never attempt to modify or override the chain saw's 

controls or safety devices in any way.

– Never use a chain saw that has been modified or 

altered from its original design.

■ The STIHL AK series battery is designed for use only with 

compatible STIHL power tools.

■ The STIHL AL 101, AL 300 or AL 500 series charger is 

designed for charging STIHL AK and AP series batteries 

only.

6.2 Operator

WARNING

■ Working with the chain saw can be strenuous. The 

operator must be in good physical condition and mental 

health. To reduce the risk of personal injury from fatigue 

and loss of control:

– Check with your doctor before using the chain saw if 

you have any health condition that may be 

aggravated by strenuous work.

– Do not operate the chain saw while under the 

influence of any substance (drug, alcohol or 

medication, etc.) that might impair vision, balance, 

dexterity or judgment.

– Be alert. Do not operate the chain saw when you are 

tired. Take a break if you become tired.

– Do not permit minors to use the chain saw.

■ Prolonged use of a chain saw (or other power tools) 

exposing the operator to vibrations may produce white 

finger disease (Raynaud's phenomenon) or carpal tunnel 

syndrome. These conditions reduce the hand's ability to 

feel and regulate temperature. They produce numbness 

and burning sensations and may also cause nerve and 

circulation damage as well as tissue necrosis.

■ All factors which contribute to white finger disease are not 

known. Cold weather, smoking and diseases or physical 

conditions that affect blood vessels and blood transport, 

as well as high vibration levels and long periods of 

exposure to vibration, are mentioned as factors in the 

development of white finger disease.

■ To reduce the risk of white finger disease and carpal 

tunnel syndrome:

– Wear gloves while working and keep your hands 

warm.

– Keep the chain saw well maintained. An improperly 

maintained chain saw or one with loose components 

will tend to have higher vibration levels.

– Keep the saw chain sharp. A dull saw chain will 

increase cutting time, and pressing a dull saw chain 

through wood will increase the vibrations transmitted 

to your hands.

– Maintain a firm grip at all times, but do not squeeze 

the handles with constant, excessive pressure. Take 

frequent breaks.

■ These precautions do not guarantee that you will not 

sustain white finger disease or carpal tunnel syndrome.

– Closely monitor the condition of your hands and 

fingers if you are a regular user.

– Seek medical advice immediately if any of the above 

symptoms appear.

■ According to STIHL's current knowledge, the electric 

motor of this chain saw should not interfere with a 

pacemaker.

– However, persons with a pacemaker should consult 

their physician and pacemaker manufacturer before 

operating this chain saw.

Summary of Contents for MSA 120 C

Page 1: ...narse como resultado de un culatazo utilice la barra y la cadena de contragolpe reducido de la forma especificada en este manual o de otros componentes reductores de contragolpe WARNING Read Instructi...

Page 2: ...Instruction Manual 1 62 Manual de instrucciones 63 128...

Page 3: ...ng the Chain Saw 13 7 Kickback and Other Reactive Forces 18 7 1 Reactive Forces 18 7 2 Kickback 19 7 3 Pull in 23 7 4 Pushback 24 8 Proper Techniques for Basic Bucking Limbing Pruning and Felling 24 8...

Page 4: ...ing the Guide Bar 51 24 4 Inspecting Maintaining and Sharpening the Saw Chain 51 25 Troubleshooting Guide 55 25 1 Chain Saw and Battery 55 25 2 Charger 56 26 Specifications 57 26 1 STIHL MSA 120 C MSA...

Page 5: ...at requires your special attention Such information is introduced with the following symbols and signal words DANGER Indicates a hazardous situation that if not avoided will result in death or serious...

Page 6: ...and drive links 7 Guide Bar Supports and guides the saw chain 8 Chain Sprocket Cover Covers the chain sprocket 9 Adjusting Wheel Permits precise adjustment of saw chain tension 10 Wingnut Tightens th...

Page 7: ...ays wear proper eye protection and an approved protective helmet 6 3 Avoid contact of the bar tip with any object This can cause the bar to kick suddenly up and back which may result in serious or fat...

Page 8: ...hed 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 c Do not expose power tools to rain or wet co...

Page 9: ...sk of starting the power tool accidentally d 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...

Page 10: ...e and could give the operator an electric shock d Wear eye protection Further protective equipment for hearing head hands legs and feet is recommended Adequate protective equipment will reduce persona...

Page 11: ...chain breakage and or kickback 4 Follow the manufacturer s sharpening and maintenance instructions for the saw chain Decreasing the depth gauge height can lead to increased kickback 6 1 Intended Use W...

Page 12: ...y produce white finger disease Raynaud s phenomenon or carpal tunnel syndrome These conditions reduce the hand s ability to feel and regulate temperature They produce numbness and burning sensations a...

Page 13: ...e your hearing Although this battery powered product is relatively quiet to reduce the risk of hearing damage Wear sound barriers ear plugs or ear muffs Regular operators should have their hearing che...

Page 14: ...n saws their use may be extremely dangerous Only attachments supplied by STIHL or expressly approved by STIHL for use with this specific model are authorized Use only attachments supplied or expressly...

Page 15: ...w chain is extremely important to maximize cutting performance and reduce the risk of personal injury from chain breakage derailment or reactive forces Read and follow the chain tensioning instruction...

Page 16: ...e off position when inserting the battery Avoid contacting the trigger switch lockout and trigger switch when grasping the rear handle of the chain saw Release the trigger switch and trigger switch lo...

Page 17: ...extremely dangerous One handed operation makes it difficult to oppose and absorb reactive forces pushback pull in kickback without losing control of the chain saw It also makes it difficult to preven...

Page 18: ...the general work area Switch off the motor immediately if you are approached To reduce the risk of injury to bystanders and unauthorized users Never leave the chain saw unattended when the battery is...

Page 19: ...r particulate matter cannot be kept at or near background levels always wear a respirator that is approved by NIOSH and rated for worksite specific conditions Follow the recommendations of governmenta...

Page 20: ...dry vegetation and brush particularly when weather conditions are hot and dry Do not use your chain saw around flammable materials or around vegetation or brush when there is a risk of fire or wildfir...

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