Husqvarna 550XPG Freeing a tree that has fallen badly, Freeing a trapped tree, General advice

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WORKING TECHNIQUES

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 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 Operator′s manual KEY to Symbols Symbols on the machineDecompression valve Symbols in the operator’s manual Contents Dear Customer IntroductionWhat is what on the chain saw? What is WHAT?Before using a new chain saw General Safety PrecautionsChain brake and front hand guard Machine′s safety equipmentAlways use common sense Personal protective equipmentGeneral Safety Precautions Vibration damping system Throttle lockoutChain catcher Right hand guardGeneral rules Stop switchCutting equipment MufflerCutting equipment designed to reduce kickback Sharpening your chain and adjusting depth gauge setting Cause serious or even fatal injury Adjustment of depth gauge settingTensioning the chain Lubricating cutting equipmentNeedle bearing lubrication Filling with chain oilChecking chain lubrication Chain drive sprocketChecking wear on cutting equipment Working with the chain AssemblyFitting the bar and chain Fitting a spike bumperFuel Fuel HandlingLong-term storage Fuel safetyFueling Transport and storageCold engine Starting and StoppingStarting and stopping StartingStopping General working instructions Basic safety rulesWorking Techniques Before useWorking Techniques Basic cutting technique TermsLimbing Tree 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 Maintenance Carburettor adjustmentGeneral Checking the inertia brake release Checking the brake triggerImmediately Muffler Starter Changing a broken or worn starter cordTensioning the recoil spring Fitting the starter Air filterSpark plug Changing a broken recoil springNeedle bearing lubrication Adjustment of the oil pumpRunning when making adjustments Lubricating the bar tip sprocketHeated handles Air Injection centrifugal cleaningTemperature 0C or colder Winter useDaily maintenance Weekly maintenance Monthly maintenance Maintenance scheduleTechnical data Technical Data550XP TrioBrake 550XPG Saw chain filing and file gauges Guide bar and chain combinationsEC-declaration of conformity Applies to Europe onlyEN ISO 12100-2/A12009, Cispr 122007, EN ISO Page Page
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