Jonsered CS 2147 manual Clearing the trunk and preparing your retreat, Felling, Directional cuts

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SAFETY INSTRUCTIONS

Several factors affect this:

Lean of the tree

Bend

Wind direction

Arrangement of branches

Weight of snow

You may find you are forced to let the tree fall in its natural direction because it is impossible or dangerous to try to make it fall in the direction you first intended.

Another very important factor, which does not affect the felling direction but does affect your safety, is to make sure the tree has no damaged or dead branches that might break off and hit you during felling.

WARNING! During critical felling operations,

!hearing protectors should be lifted immediately when sawing is completed so that sounds and warning signals can be heard.

Clearing the trunk and preparing your retreat

Remove any branches that are in the way. To do this it is best to work from the top down and keep the trunk between you and the chain saw. Never limb above shoulder height.

Remove any undergrowth from the base of the tree and check the area for obstacles (stones, branches, holes, etc.) so that you have a clear path of retreat when the tree starts to fall.

Your path of retreat should be roughly 135 degrees away from the intended felling direction.

Felling

Felling is done using three cuts. First you make the directional cuts, which consist of the top cut and the bottom cut, then you finish with the felling cut. By placing these cuts correctly you can control the felling direction very accurately.

Directional cuts

To make the directional cuts you begin with the top cut. Stand to the right of the tree and cut on the pull stroke.

Next make the bottom cut so that it finishes exactly at the end of the top cut.

The directional cuts should run 1/4 of the diameter through the trunk and the angle between the top cut and bottom cut should be 45° .

The line where the two cuts meet is called the directional cut line. This line should be perfectly horizontal and at right angles (90° ) to the chosen felling direction.

Felling cut

The felling cut is made from the opposite side of the tree and it must be perfectly horizontal. Stand on the left side of the tree and cut on the7 pull stroke.

Make the felling cut about 3-5 cm (1.5-2 inches) above the bottom directional cut.

Set the spike bumper (if one is fitted) just behind the felling hinge. Use full throttle and advance the chain/bar slowly into the tree. Make sure the tree does not start to move in the

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Contents Operator′s manual Key to symbols KEY to SymbolsContents Safety Instructions Machine′s safety equipmentPersonal protective equipment Chain brake and hand guard Throttle lock Stop switchChain catcher Right hand guardMuffler Checking brake band wearChecking the hand guard Checking the brake trigger Checking the inertia brake releaseThrottle lock Chain catcherCutting equipment Stop switchGeneral rules Vibration damping systemBar Cutting equipment designed to minimise kickbackChain Some terms that describe the bar and chainSharpening your chain and adjusting raker clearance General information on sharpening cutting teethWith a badly sharpened chain Setting the raker clearance General advice on setting raker clearanceTensioning the chain Sharpening cutting teethChain oil Lubricating cutting equipmentFilling with chain oil Checking chain lubricationNeedle bearing lubrication Lubricating the bar tip sprocketChecking wear on cutting equipment Chain drive sprocketHow to avoid kickback What is kickback?Do not let go of the handles General safety precautions Starting Fuel safetyBasic safety rules General working instructionsTransport and storage General Basic cutting techniqueTerms CuttingLimbing Tree felling techniqueSafe distance Felling directionFelling Clearing the trunk and preparing your retreatDirectional cuts Felling cutCutting the trunk into logs Freeing a tree that has fallen badly General adviceFreeing a trapped tree Cutting trees and branches that are in tensionWhat is what on the chain saw? What is WHAT?Fitting the bar and chain AssemblyFitting a spike bumper Working with the chainFuel Handling FuelFollowing applies to chain saws with catalytic converters Fuelling Chain oilStarting and stopping Starting and StoppingCold engine Warm engineStopping Carburettor MaintenanceCorrectly adjusted carburettor Fine adjustment of the idle speed TStarter High speed jet HSpark plug Air filterTensioning the recoil spring Changing a broken recoil springWhen making adjustments Adjustment of the oil pumpMuffler Needle bearing lubricationHeated handles CS 2147W, CS 2152W Centrifugal cleaning TurboElectrical carburettor heating CS 2147WH, CS 2152WH Winter useWeekly maintenance Daily maintenanceMonthly maintenance Below you will find some general maintenance instructionsTechnical data Technical DataBar and chain combinations EC-declaration of conformity Applies to Europe onlyCispr 121997, EN608 Page 1088890-26
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