Husqvarna 1153158-95 manual Felling technique for tree tops, Felling direction, Directional cuts

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WORKING TECHNIQUES

Felling technique for tree tops

WARNING! 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

During tree maintenance work above ground level, the working area must always be secured and marked out with signs, tape or the like. The safe distance between the top of the tree that is to be felled and the nearest workplace must be at least 2 1/2 times the height of the tree. 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. The main thing to avoid is that the falling tree top should get jammed in another tree. Taking down a ”jammed” tree top is very dangerous (see point 4 in this section).

Once you have decided which way you want the top of the tree to fall you must assess which way the top of the tree would fall naturally.

Several factors affect this:

•Lean of the tree

•Bend

•Wind direction

•Arrangement of branches

•Weight of snow

You may find you are forced to let the tree-top 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.

WARNING! During critical felling

! operations, hearing protectors should be

lifted immediately when sawing is completed so that sounds and warning signals can be heard.

Topping a tree

Topping a tree 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.Try to take your position in the tree on the right side 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.

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Contents 334T 338XPT KEY to Symbols Symbols on the machineSymbols in the operator’s manual EPA 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 Personal protective equipment Machine′s safety equipmentChain brake and front hand guard Throttle lockout Chain catcherVibration damping system General rules Stop switchCutting equipment MufflerChain BarGeneral information on sharpening cutting teeth Sharpening your chain and adjusting depth gauge settingTensioning the chain Lubricating cutting equipment Filling with chain oilChecking chain lubrication Checking wear on cutting equipment Chain drive sprocketAssembly Fitting the bar and chainWorking with the chain Fuel Fuel HandlingLong-term storage Fuel safetyFueling Transport and storageWarm engine Starting and StoppingStarting and stopping Cold engineStopping General working instructions Basic safety rulesWorking Techniques Before useDo not let go of the handles Securing the work position for two-handed use Using the chainsaw in the treeGeneral requirements working at height Preparing to use the saw in the treeBasic cutting technique Limbing Felling technique for tree tops Felling directionDirectional cuts Cutting trees and branches that are in tension General adviceFreeing a tree that has fallen badly Felling cutHow to avoid kickback What is kickback?Cutting the trunk into logs Carburetor MaintenanceHigh speed jet H Correctly adjusted carburetorThrottle lockout Muffler StarterChanging a broken or worn starter cord Fitting the starter Air filterTensioning the recoil spring Changing a broken recoil springLubricating the bar tip sprocket Adjustment of the oil pumpWhen making adjustments Spark plugDaily maintenance Weekly maintenance Monthly maintenance Maintenance scheduleTechnical data Technical DataBar and chain combinations, model 334T Bar and chain combinations, model 338XPTSaw chain filing and file gauges Your Warranty Rights and Obligations Federal and California Emissions Control WarrantyEmission Warranty Parts List Other safety precautions American Standard Safety PrecautionsSafety precautions for chain saw users Kickback safety precautionsPage Page Original instructions 1153158-95

1153158-95 specifications

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