Jonsered CS 2147 manual Basic cutting technique, General, Terms, Cutting

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SAFETY INSTRUCTIONS

Never put a chain saw down while the engine is running unless you have it in clear view and the chain brake is on. Switch the engine off before leaving your chain saw for any length of time.

Basic cutting technique

WARNING! Never use a chain saw by holding

!it with one hand. A chain saw is not safely controlled with one hand; you can cut yourself. Always have a secure, firm grip around the handles with both hands.

General

Always use full throttle when cutting!

Reduce the speed to idle after every cut (running the engine for too long at full throttle without any load, i.e. without any resistance from the chain during cutting, can lead to serious engine damage).

Cutting from above = Cutting on the pull stroke.

Cutting from below = Cutting on the push stroke.

Cutting on the push stroke increases the risk of kickback. See instructions under the heading How to avoid kickback.

Terms

Cutting = General term for cutting through wood.

Limbing = Cutting branches off a felled tree.

Splitting = When the object you are cutting breaks off before the cut is complete.

There are five important factors you should consider before making a cut:

1 Make sure the cutting equipment will not jam in the cut.

2 Make sure the object you are cutting will not split.

3Make sure the chain will not strike the ground or any other object during or after cutting.

4 Is there a risk of kickback?

5Do the conditions and surrounding terrain affect how safely you can stand and move about?

Two factors decide whether the chain will jam or the object that you are cutting will split: the first is how the object is supported before and after cutting, and the second is whether it is in tension.

In most cases you can avoid these problems by cutting in two stages; from the top and from the bottom.You need to support the object so that it will not trap the chain or split during cutting.

WARNING! If the chain jams in the cut: stop

!the engine! Don’t try to pull the chain saw free. If you do you may be injured by the chain when the chain saw suddenly breaks free. Use a lever to open up the cut and free the chain saw.

The following instructions describe how to handle the commonest situations you are likely to encounter when using a chain saw.

Cutting

The log is lying on the ground.There is little risk of the chain jamming or the object splitting. However there is a risk that the chain will touch the ground when you finish the cut.

Cut all the way through the log from above. Avoid letting the chain touch the ground as you finish the cut. Maintain full throttle but be prepared for what might happen.

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Contents Operator′s manual Key to symbols KEY to SymbolsContents Machine′s safety equipment Safety InstructionsPersonal protective equipment Chain brake and hand guard Right hand guard Stop switchThrottle lock Chain catcherChecking brake band wear MufflerChecking the hand guard 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 ChainGeneral information on sharpening cutting teeth Sharpening your chain and adjusting raker clearanceWith a badly sharpened chain 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 equipmentWhat is kickback? How to avoid kickbackDo not let go of the handles General safety precautions Starting Fuel safetyGeneral working instructions Basic safety rulesTransport and storage 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 bumperFuel Fuel HandlingFollowing applies to chain saws with catalytic converters 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 Applies to Europe only EC-declaration of conformityCispr 121997, EN608 Page 1088890-26