Husqvarna 336 EPA I manual Tree felling technique, Safe distance, Felling direction

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WORKING TECHNIQUES

Tree felling technique

IMPORTANT! It takes a lot of experience to fell a tree. Inexperienced users of chain saws should not fell trees. Do not attempt any task beyond your experience level!

Safe distance

The safe distance between a tree that is to be felled and anyone else working nearby is at least 2 1/2 tree lengths. Make sure that no-one else is in this ”risk zone” before or during felling.

Felling direction

The aim is to fell the tree in a position where you can limb and cross-cut the log as easily as possible. You want it to fall in a location where you can stand and move about safely.

Once you have decided which way you want the tree to fall you must judge which way the tree would fall naturally.

Several factors affect this:

•Lean of the tree

•Bend

•Wind direction

•Arrangement of branches

•Weight of snow

•Obstacles within the reach of the tree: for example, other trees, power lines, roads and buildings.

•Look for signs of damage and rot in the stem, this makes it more probably that the tree will break and start to fall before you expect it to.

You may find you are forced to let the tree fall in its natural direction because it is impossible or dangerous to try to make it fall in the direction you first intended.

Another very important factor, which does not affect the felling direction but does affect your safety, is to make sure the tree has no damaged or dead branches that might break off and hit you during felling.

The main point to avoid is letting the tree fall onto another tree. It is very dangerous to remove a trapped tree and there is high accident risk. See instructions under the heading Freeing a tree that has fallen badly.

IMPORTANT! During critical felling operations, hearing protectors should be lifted immediately when sawing is completed so that sounds and warning signals can be heard.

Clearing the trunk and preparing your retreat

Delimb the stem up to shoulder height. It is safer to work from the top down and to have the tree between you and the saw.

Remove any undergrowth from the base of the tree and check the area for obstacles (stones, branches, holes, etc.) so that you have a clear path of retreat when the tree starts to fall.

Your path of retreat should be roughly 135 degrees away from the intended felling direction.

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Contents Operator’s manual 336 EPA Symbols on the machine KEY to SymbolsSymbols 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 PrecautionsAlways use common sense Personal protective equipment Machine′s safety equipmentChain brake and front hand guard General Safety Precautions Chain catcher Throttle lockoutRight hand guard Cutting equipment Stop switchVibration damping system MufflerCutting equipment designed to minimise kickback General rulesBar ChainGeneral information on sharpening cutting teeth Sharpening your chain and adjusting depth gauge settingSharpening cutting teeth Adjustment of depth gauge setting General advice on adjusting depth gauge settingTensioning the chain 336339XP Lubricating cutting equipmentChain oil Filling with chain oilNeedle bearing lubrication Chain drive sprocketChecking wear on cutting equipment Fitting the bar and chain AssemblyFuel Fuel HandlingFueling Fuel safetyTransport and storage Long-term storageStarting and stopping Starting and StoppingCold engine Warm engineStopping Working Techniques Basic safety rulesBefore use General working instructionsGeneral rules General Basic cutting techniqueTerms Cutting LimbingSafe distance Tree felling techniqueFelling direction Clearing the trunk and preparing your retreatDirectional cuts FellingFreeing a tree that has fallen badly General adviceFreeing a trapped tree Cutting trees and branches that are in tensionWhat is kickback? How to avoid kickbackCutting the trunk into logs Carburetor adjustment MaintenanceGeneral High speed jet H Correctly adjusted carburetorChecking brake band wear Checking the front hand guardChecking the brake trigger Starter MufflerChanging a broken or worn starter cord Tensioning the recoil spring Air filterChanging a broken recoil spring Fitting the starterSpark plug Adjustment of the oil pumpLubricating the bar tip sprocket Cooling systemDaily maintenance Weekly maintenance Monthly maintenance Maintenance scheduleTechnical data Technical DataSaw chain filing and file gauges Bar and chain combinations, modelYour Warranty Rights and Obligations Federal Emission Control Warranty StatementSafety precautions for chain saw users American Standard Safety PrecautionsKickback safety precautions Other safety precautions1150239-95 ´z+R7¶5B¨ ´z+R7¶5B¨
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