Jonsered CS 2156 manual How to avoid kickback, What is kickback?, Do not let go of the handles

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SAFETY INSTRUCTIONS

How to avoid kickback

WARNING! Kickback can happen very

!suddenly and violently; kicking the chain saw, bar and chain back at the user. If this happens when the chain is moving it can cause very serious, even fatal injuries. It is vital you understand what causes kickback and that you can avoid it by taking care and using the right working technique.

What is kickback?

The word kickback is used to describe the sudden reaction that causes the chain saw and bar to jump off an object when the upper quadrant of the tip of the bar, known as the kickback zone, touches an object.

Kickback always occurs in the cutting plane of the bar. Normally the chain saw and bar are thrown backwards and upwards towards the user. However, the chain saw may move in a different direction depending on the way it was being used when the kickback zone of the bar touched the object.

Kickback only occurs if the kickback zone of the bar touches an object.

General rules

1If you understand what kickback is and how it happens then you can reduce or eliminate the element of surprise. By being prepared you reduce the risk. Kickback is usually quite mild, but it can sometimes be very sudden and violent.

2Always hold the chain saw firmly with your right hand on the rear handle and your left hand on the front handle. Wrap your fingers and thumbs around the handles. You should use this grip whether you are right-handed or left- handed. This grip minimises the effect of kickback and lets you keep the chain saw under control.

Do not let go of the handles!

3Most kickback accidents happen during limbing. Make sure you are standing firmly and that there is nothing in the way that might make you trip or lose your balance.

Lack of concentration can lead to kickback if the kickback zone of the bar accidentally touches a branch, nearby tree or some other object.

4Never use the chain saw above shoulder height and try not to cut with the tip of the bar. Never use the chain saw one-handed!

5In order to keep control of your saw, always maintain a firm foothold. Never work on a ladder, in a tree or on any other insecure support.

6Always use a fast cutting speed, i.e. full throttle.

7Take great care when you cut with the top edge of the bar, i.e. when cutting from the underside of the object. This is known as cutting on the push stroke. The chain tries to push the chain saw back towards the user.

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Contents EPA KEY to Symbols Key to symbolsContents EPA Machine′s safety equipment Safety InstructionsPersonal protective equipment Chain brake and front hand guard Stop switch Throttle lockChain catcher Right hand guardChecking brake band wear MufflerChecking the front hand guard Checking the inertia brake release Checking the brake triggerThrottle lock Chain catcherStop switch Cutting equipmentGeneral rules Vibration damping systemCutting equipment designed to minimise kickback BarChain Some terms that describe the bar and chainSharpening your chain and adjusting raker clearance General information on sharpening cutting teethSharpening cutting teeth With a badly sharpened chainGeneral advice on setting raker clearance Setting the raker clearanceTensioning the chain If the raker clearance is too largeLubricating cutting equipment Chain oilFilling with chain oil Checking chain lubricationChecking wear on cutting equipment Needle bearing lubricationChain drive sprocket What is kickback? How to avoid kickbackDo not let go of the handles General safety precautions StartingFuel safety Basic safety rulesGeneral working instructions Transport and storageGeneral Basic cutting techniqueTerms Cutting LimbingTree felling technique Safe distanceFelling direction Clearing the trunk and preparing your retreatFelling cut General advice Freeing a tree that has fallen badlyCutting the trunk into logs Freeing a trapped treeWhat is WHAT? What is what on the chain saw?Assembly Fitting the bar and chainFuel Fuel HandlingFollowing applies to chain saws with catalytic converters Chain oil FuellingStarting and Stopping Starting and stoppingCold engine Warm engineStopping Maintenance CarburettorCorrectly adjusted carburettor StarterChanging a broken or worn starter cord Tensioning the recoil springAir filter Spark plugMuffler Fitting the starterAdjustment of the oil pump Centrifugal cleaning TurboWhen making adjustments Needle bearing lubricationTemperature 0 C 32 F or colder Temperature -5C 23 F or colderHeated handles CS 2156W, CS 2159W Electrical carburettor heating CS 2156WH, CS 2159WHMonthly maintenance Daily maintenance Weekly maintenanceBelow you will find some general maintenance instructions Technical Data Technical data050/1,3 mm 20BP Bar Length Pitch, inch Max nose Chain Inches Radius063/1,6 mm 22BP Federal Emission Control Warranty Statement Your Warranty Rights and Obligations1088891-95