Jonsered CS 2156 manual Felling cut

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SAFETY INSTRUCTIONS

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 the pull stroke.

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

Use full throttle and bring the bar and chain slowly into the tree. Make sure the tree does not start to move in the opposite direction to your intended felling direction. Drive a wedge or breaking bar into the cut as soon as it is deep enough.

Finish the felling cut parallel with the directional cut line so that the distance between them is at least 1/10 of the trunk diameter. The uncut section of the trunk is called the felling hinge.

The felling hinge controls the direction that the tree falls in.

All control over the felling direction is lost if the felling hinge is too narrow or non-existent, or if the directional cuts and felling cut are badly placed.

When the felling cut and directional cut are complete the tree should start to fall by itself or with the aid of a felling wedge or breaking bar.

We recommend that you use a bar that is longer than the diameter of the tree, so that you can make the felling cut and directional cuts with single cutting strokes. See the Technical data section to ﬁnd out which lengths of bar are recommended for your saw.

There are methods for felling trees with a diameter larger than the bar length. However these methods involve a much greater risk that the kickback zone of the bar will come into contact with the tree.

WARNING! Unless you have special training

!we advise you not to fell trees with a diameter larger than the bar length of your saw!

22 – English

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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 Chain catcher Stop switchThrottle lock Right hand guardChecking brake band wear MufﬂerChecking the front hand guard Throttle lock Checking the inertia brake releaseChecking the brake trigger Chain catcherGeneral rules Stop switchCutting equipment Vibration damping systemChain Cutting equipment designed to minimise kickbackBar Some terms that describe the bar and chainSharpening cutting teeth Sharpening your chain and adjusting raker clearanceGeneral information on sharpening cutting teeth With a badly sharpened chainTensioning the chain General advice on setting raker clearanceSetting the raker clearance If the raker clearance is too largeFilling with chain oil Lubricating cutting equipmentChain 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 StartingGeneral working instructions Fuel safetyBasic safety rules Transport and storageGeneral Basic cutting techniqueTerms Cutting LimbingFelling direction Tree felling techniqueSafe distance Clearing the trunk and preparing your retreatFelling cut Cutting the trunk into logs General adviceFreeing a tree that has fallen badly 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 FuellingCold engine Starting and StoppingStarting and stopping Warm engineStopping Maintenance CarburettorChanging a broken or worn starter cord Correctly adjusted carburettorStarter Tensioning the recoil springMufﬂer Air ﬁlterSpark plug Fitting the starterWhen making adjustments Adjustment of the oil pumpCentrifugal cleaning Turbo Needle bearing lubricationHeated handles CS 2156W, CS 2159W Temperature 0 C 32 F or colderTemperature -5C 23 F or colder 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