Husqvarna 570 576 XP manual Directional cuts, Felling cut

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WORKING TECHNIQUES

Felling

WARNING! Unless you have special ! training we advise you not to fell trees

with a diameter larger than the bar length of your saw!

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 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.

26 – English

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Contents 570 576 XP Symbols in the operator’s manual KEY to SymbolsSymbols on the machine Contents Introduction Dear CustomerWhat is WHAT? What is what on the chain saw?General Safety Precautions Before using a new chain sawPersonal protective equipment Machine′s safety equipmentAlways use common sense Chain brake and front hand guardGeneral Safety Precautions Right hand guard Throttle lockoutChain catcher Vibration damping system Stop switchCutting equipment MufﬂerChain Cutting equipment designed to reduce kickbackBar Injuries Some terms that describe the bar and chainSharpening your chain and adjusting depth gauge setting General information on sharpening cutting teethTensioning the chain Filling with chain oil Lubricating cutting equipmentWhich could lead to serious, even fatal injuries Chain oil Checking chain lubricationChecking wear on cutting equipment Chain drive sprocketNeedle bearing lubrication Fitting a spike bumper AssemblyFitting the bar and chain Working with the chainFuel Handling FuelTransport and storage Fuel safetyFuelling Long-term storageCold engine Starting and StoppingStarting and stopping Warm engineStopping Before use Basic safety rulesWorking Techniques General working instructionsGeneral rules Basic cutting technique TermsLimbing Felling direction Tree felling techniqueSafe distance Clearing the trunk and preparing your retreatDirectional cuts Felling cutCutting trees and branches that are in tension Freeing a tree that has fallen badlyFreeing a trapped tree General advice How to avoid kickbackWhat is kickback? Cutting the trunk into logsGeneral MaintenanceCarburettor adjustment Checking brake band wear Correctly adjusted carburettorHigh speed jet H Checking the front hand guardChecking the inertia brake release ImmediatelyMufﬂer Tensioning the recoil spring StarterChanging a broken or worn starter cord Changing a broken recoil springLubricating the bar tip sprocket Air ﬁlterSpark plug Running when making adjustments Adjustment of the oil pumpAir Injection centrifugal cleaning Needle bearing lubricationWinter use Heated handlesMaintenance schedule Daily maintenance Weekly maintenance Monthly maintenanceTechnical Data Technical dataApplies to Europe only Bar and chain combinationsSaw chain ﬁling and ﬁle gauges EC-declaration of conformity EN ISO 12100-22003, Cispr 122001, EN ISOPage Page ´z+SÆ6¶6w¨ Page 1151002-26