Jonsered CS 2171WH manual Tree felling technique, Safe distance, Felling direction

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SAFETY INSTRUCTIONS

Tree felling technique

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 that you feel unsure of!

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. The main point to avoid is letting the tree fall onto another tree. See instructions under the heading Freeing a tree that has fallen badly.

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

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.

WARNING! 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

Remove any branches that are in the way. To do this it is best to work from the top down and keep the trunk between you and the chain saw. Never limb above shoulder height.

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.

Felling

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°.

20 – English

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Contents Operator´s manual KEY to Symbols Key to symbolsContents Personal protective equipment Safety InstructionsMachine′s safety equipment Chain brake and front hand guard Stop switch Throttle lockChain catcher Right hand guardMuffler Checking brake band wearChecking the front hand guard Checking the inertia brake releaseStop switch Throttle lockChain catcher Right hand guardCutting equipment General rulesCutting equipment designed to minimise kickback MufflerSharpening your chain and adjusting raker clearance ChainSome terms that describe the bar and chain General information on sharpening cutting teethSharpening cutting teeth General advice on setting raker clearance Setting the raker clearanceTensioning the chain If the raker clearance is too largeLubricating cutting equipment How to avoid kickback What is kickback?Checking wear on cutting equipment Chain drive sprocketDo not let go of the handles General safety precautions StartingFuel safety Basic safety rulesGeneral working instructions Transport and storageTerms Basic cutting techniqueGeneral Cutting LimbingTree felling technique Safe distanceFelling direction Clearing the trunk and preparing your retreatCutting the trunk into logs Felling cutGeneral advice Freeing a tree that has fallen badlyFreeing a trapped tree Cutting trees and branches that are in tensionWhat is WHAT? What is what on the chain saw?Assembly Fitting the bar and chainFitting a spike bumper Working with the chainFuel Handling FuelPetrol Two-stroke oilMin 3 m 10ft Chain oilFuelling Starting and Stopping Starting and stoppingCold engine Warm engineStopping Carburettor with movement limiters MaintenanceCarburettor adjustment Fine adjustment of the idle speed T Correctly adjusted carburettorCarburettor without movement limiters Low speed jet LRecommended engine speeds are as follows Idle speed, rpmStarter Air filterAdjustment of the oil pump When making adjustmentsSpark plug MufflerCentrifugal cleaning Turbo Cooling systemHeated handles Electrical carburettor heatingBelow you will find some general maintenance instructions Daily maintenance Weekly maintenanceMonthly maintenance Technical Data Technical dataLength, inches Pitch, inch Max. number of teeth on Bar and chain combinationsBar Chain EN292-2, Cispr 121997, EN608 EC-declaration of conformityApplies to Europe only Page 1088935-26 ´z*xT¶6U¨ ´z*xT¶6U¨
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