Jonsered CS 2147 manual Cutting the trunk into logs

Page 22

SAFETY INSTRUCTIONS

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.

22 – English

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Contents Operator′s manual KEY to Symbols Key to symbolsContents Machine′s safety equipment Safety InstructionsPersonal protective equipment Chain brake and hand guard Chain catcher Stop switchThrottle lock Right hand guardChecking brake band wear MufﬂerChecking the 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 chainGeneral information on sharpening cutting teeth Sharpening your chain and adjusting raker clearanceWith a badly sharpened chain Tensioning the chain General advice on setting raker clearanceSetting the raker clearance Sharpening cutting teethFilling with chain oil Lubricating cutting equipmentChain oil Checking chain lubricationChecking wear on cutting equipment Lubricating the bar tip sprocketNeedle bearing lubrication Chain drive sprocketWhat is kickback? How to avoid kickbackDo not let go of the handles General safety precautions Fuel safety StartingGeneral working instructions Basic safety rulesTransport and storage Terms Basic cutting techniqueGeneral CuttingSafe distance Tree felling techniqueLimbing Felling directionDirectional cuts Clearing the trunk and preparing your retreatFelling Felling cutCutting the trunk into logs Freeing a trapped tree General adviceFreeing a tree that has fallen badly Cutting trees and branches that are in tensionWhat is WHAT? What is what on the chain saw?Fitting a spike bumper AssemblyFitting the bar and chain Working with the chainFuel Fuel HandlingFollowing applies to chain saws with catalytic converters Chain oil FuellingCold engine Starting and StoppingStarting and stopping Warm engineStopping Maintenance CarburettorStarter Fine adjustment of the idle speed TCorrectly adjusted carburettor High speed jet HTensioning the recoil spring Air ﬁlterSpark plug Changing a broken recoil springMufﬂer Adjustment of the oil pumpWhen making adjustments Needle bearing lubricationElectrical carburettor heating CS 2147WH, CS 2152WH Centrifugal cleaning TurboHeated handles CS 2147W, CS 2152W Winter useMonthly maintenance Daily maintenanceWeekly maintenance Below you will ﬁnd some general maintenance instructionsTechnical Data Technical dataBar and chain combinations Applies to Europe only EC-declaration of conformityCispr 121997, EN608 Page 1088890-26