Husqvarna 3120XP Freeing a tree that has fallen badly, Freeing a trapped tree, General advice

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WORKING TECHNIQUES

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 instructions under the heading 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.

Freeing a tree that has fallen badly

Freeing a ”trapped tree”

It is very dangerous to remove a trapped tree and there is high accident risk.

Never try to fell the tree that is trapped.

Never work in the risk zone of the hanging trapped tree.

The safest method is to use a winch.

Tractor-mounted

Portable

Cutting trees and branches that are in tension

Preparations: Work out which side is in tension and where the point of maximum tension is (i.e. where it would break if it was bent even more).

Decide which is the safest way to release the tension and whether you are able to do it safely. In complicated situations the only safe method is to put aside your chain saw and use a winch.

General advice:

Position yourself so that you will be clear of the tree or branch when the tension is released.

Make one or more cuts at or near the point of maximum tension. Make as many cuts of sufficient depth as necessary to reduce the tension and make the tree or branch break at the point of maximum tension.

Never cut straight through a tree or branch that is in tension!

If you must cut across tree/limb, make two to three cuts, one inch apart, one to two inches deep.

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Contents 3120XP KEY to Symbols Symbols on the machineSymbols in the operator’s manual Contents Dear Customer IntroductionWhat is what on the chain saw? What is WHAT?General Safety Precautions Before using a new chain sawAlways use common sense Machine′s safety equipment Personal protective equipmentChain brake and front hand guard General Safety Precautions Vibration damping system Throttle lockoutChain catcher Right hand guardGeneral rules Stop switchCutting equipment MufflerSharpening your chain and adjusting depth gauge setting Increased if the depth gauge setting is Adjustment of depth gauge settingToo large Chain oil Tensioning the chainLubricating cutting equipment Which could lead to serious, even fatalChecking wear on cutting equipment Checking chain lubricationChain drive sprocket Needle bearing lubricationBar Assembly Fitting the bar and chainWorking with the chain Fuel Fuel HandlingFuel safety FuellingExtra chain oil Long-term storage Transport and storageWarm engine Starting and StoppingStarting and stopping Cold engineStopping General working instructions Basic safety rulesWorking Techniques Before useWorking Techniques Limbing Basic cutting techniqueTerms There are five important factors you should considerTree felling technique Safe distanceFelling direction Your saw Clearing the trunk and preparing your retreatFelling cut Felling Training we advise you not to fell treesCutting trees and branches that are in tension General adviceFreeing a tree that has fallen badly Freeing a trapped treeHow to avoid kickback What is kickback?Cutting the trunk into logs Carburettor MaintenanceHigh speed jet H Correctly adjusted carburettorImmediately Checking the brake triggerMuffler StarterChanging a broken or worn starter cord Tensioning the recoil spring Changing a broken recoil springFitting the starter Must always be replaced Air filterSpark plug Lubricating the bar tip sprocketAdjustment of the oil pump Needle bearing lubricationCooling system Daily maintenance Weekly maintenance Monthly maintenance Maintenance scheduleTechnical data Technical DataSaw chain filing and file gauges Guide bar and saw chain combinations0404/09/2119 EC-declaration of conformityApplies to Europe only EN ISO 121002010, ISO 149822009, EN ISOOriginal instructions 1153183-26
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