Jonsered CS 2171WH manual Cutting the trunk into logs, Felling cut

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SAFETY INSTRUCTIONS

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.

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 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!

Limbing

WARNING! Most kickback accidents happen

!during limbing! Pay close attention to the position of the kickback zone of the bar when you are limbing branches that are in tension!

Make sure that you can stand and move about safely. Work on the left side of the trunk. Work as close as possible to the chain saw for maximum control. If possible, let the weight of the chain saw rest on the trunk.

Keep the trunk between you and the chain saw as you move along the trunk.

Cutting the trunk into logs

See instructions under the heading Basic cutting technique.

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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 front hand guard Throttle lock Stop switchChain catcher Right hand guardChecking brake band wear MufflerChecking the front hand guard Checking the inertia brake releaseThrottle lock Stop switchChain catcher Right hand guardGeneral rules Cutting equipmentCutting equipment designed to minimise kickback MufflerChain Sharpening your chain and adjusting raker clearanceSome terms that describe the bar and chain General information on sharpening cutting teethSharpening cutting teeth Setting the raker clearance General advice on setting raker clearanceTensioning the chain If the raker clearance is too largeLubricating cutting equipment What is kickback? How to avoid kickbackChecking wear on cutting equipment Chain drive sprocketDo not let go of the handles Starting General safety precautionsBasic safety rules Fuel safetyGeneral working instructions Transport and storageBasic cutting technique GeneralTerms Limbing CuttingSafe distance Tree felling techniqueFelling direction Clearing the trunk and preparing your retreatFelling cut Cutting the trunk into logsFreeing 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 Fuel HandlingPetrol Two-stroke oilChain oil FuellingMin 3 m 10ft Starting and stopping Starting and StoppingCold engine Warm engineStopping Maintenance Carburettor adjustmentCarburettor with movement limiters Correctly adjusted carburettor Fine adjustment of the idle speed TCarburettor without movement limiters Low speed jet LIdle speed, rpm Recommended engine speeds are as followsAir filter StarterWhen making adjustments Adjustment of the oil pumpSpark plug MufflerCooling system Centrifugal cleaning TurboHeated handles Electrical carburettor heatingDaily maintenance Weekly maintenance Monthly maintenanceBelow you will find some general maintenance instructions Technical data Technical DataBar and chain combinations Bar ChainLength, inches Pitch, inch Max. number of teeth on EC-declaration of conformity Applies to Europe onlyEN292-2, Cispr 121997, EN608 Page 1088935-26 ´z*xT¶6U¨ ´z*xT¶6U¨
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