Jonsered CS 2147 Freeing a tree that has fallen badly, Freeing a trapped tree, General advice

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SAFETY INSTRUCTIONS

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.

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!

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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 hand guard Right hand guard Stop switchThrottle lock Chain catcherChecking the hand guard MufﬂerChecking brake band wear Chain catcher Checking the inertia brake releaseChecking the brake trigger Throttle lockVibration damping system Stop switchCutting equipment General rulesSome terms that describe the bar and chain Cutting equipment designed to minimise kickbackBar ChainWith a badly sharpened chain Sharpening your chain and adjusting raker clearanceGeneral information on sharpening cutting teeth Sharpening cutting teeth General advice on setting raker clearanceSetting the raker clearance Tensioning the chainChecking chain lubrication Lubricating cutting equipmentChain oil Filling with chain oilChain drive sprocket Lubricating the bar tip sprocketNeedle bearing lubrication Checking wear on cutting equipmentDo not let go of the handles How to avoid kickbackWhat is kickback? General safety precautions Starting Fuel safetyTransport and storage Basic safety rulesGeneral working instructions Cutting Basic cutting techniqueGeneral TermsFelling direction Tree felling techniqueLimbing Safe distanceFelling cut Clearing the trunk and preparing your retreatFelling Directional cutsCutting the trunk into logs Cutting trees and branches that are in tension General adviceFreeing a tree that has fallen badly Freeing a trapped treeWhat is what on the chain saw? What is WHAT?Working with the chain AssemblyFitting the bar and chain Fitting a spike bumperFollowing applies to chain saws with catalytic converters Fuel HandlingFuel Fuelling Chain oilWarm engine Starting and StoppingStarting and stopping Cold engineStopping Carburettor MaintenanceHigh speed jet H Fine adjustment of the idle speed TCorrectly adjusted carburettor StarterChanging a broken recoil spring Air ﬁlterSpark plug Tensioning the recoil springNeedle bearing lubrication Adjustment of the oil pumpWhen making adjustments MufﬂerWinter use Centrifugal cleaning TurboHeated handles CS 2147W, CS 2152W Electrical carburettor heating CS 2147WH, CS 2152WHBelow you will ﬁnd some general maintenance instructions Daily maintenanceWeekly maintenance Monthly maintenanceTechnical data Technical DataBar and chain combinations Cispr 121997, EN608 EC-declaration of conformityApplies to Europe only Page 1088890-26