Jonsered CS 2147 manual Chain brake and hand guard

Page 5

SAFETY INSTRUCTIONS

Chain brake and hand guard

Your chain saw is equipped with a chain brake that is designed to stop the chain immediately if you get a kickback. The chain brake reduces the risk of accidents, but only you can prevent them.

Take care when using your saw and make sure the kickback zone of the bar never touches any object.

•The chain brake (A) can either be activated manually (by your left hand) or automatically by the inertia release mechanism (a pendulum that swings independently of the chain saw. On most of our models the hand guard acts as a counterweight in case of kickback).

The brake is applied when the hand guard (B) is pushed forwards.

This movement activates a spring-loaded mechanism that tightens the brake band (C) around the engine drive system (D) (clutch drum).

•The hand guard is not designed solely to activate the chain brake. Another important feature is that it reduces the risk of the chain hitting your left hand if you lose grip of the front handle.

•The chain brake must be engaged when the chain saw is started.

•You can also use the chain brake as a temporary brake when you change position or if you put the chain saw down for a short time! Apart from the fact that a chain saw with a chain brake greatly reduces the risk of accidents

due to kickback, you should also apply the chain brake manually if there is a risk of the chain accidentally hitting anyone or anything close by.

•To release the chain brake pull the hand guard backwards, towards the front handle.

•Kickback can be very sudden and violent. Most kickbacks are minor and do not always activate the chain brake. If this happens you should hold the chain saw firmly and not let go.

•The way the chain brake is activated, either manually or automatically by the inertia release mechanism, depends on the force of the kickback and the position of the chain saw in relation to the object that the kickback zone of the bar strikes.

If you get a violent kickback while the kickback zone of the bar is farthest away from you the chain brake will be activated by the movement of the counterweight (inertia activated) in the kickback direction.

If the kickback is less violent or the kickback zone of the bar is closer to you the chain brake will be activated manually by the movement of your left hand.

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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 Throttle lock Stop switchChain catcher Right hand guardChecking the hand guard MufflerChecking brake band wear Checking the brake trigger Checking the inertia brake releaseThrottle lock Chain catcherCutting equipment Stop switchGeneral rules Vibration damping systemBar Cutting equipment designed to minimise kickbackChain Some terms that describe the bar and chainWith a badly sharpened chain Sharpening your chain and adjusting raker clearanceGeneral information on sharpening cutting teeth Setting the raker clearance General advice on setting raker clearanceTensioning the chain Sharpening cutting teethChain oil Lubricating cutting equipmentFilling with chain oil Checking chain lubricationNeedle bearing lubrication Lubricating the bar tip sprocketChecking wear on cutting equipment Chain drive sprocketDo 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 General Basic cutting techniqueTerms CuttingLimbing Tree felling techniqueSafe distance Felling directionFelling Clearing the trunk and preparing your retreatDirectional cuts Felling cutCutting the trunk into logs Freeing a tree that has fallen badly General adviceFreeing a trapped tree Cutting trees and branches that are in tensionWhat is what on the chain saw? What is WHAT?Fitting the bar and chain AssemblyFitting a spike bumper Working with the chainFollowing applies to chain saws with catalytic converters Fuel HandlingFuel Fuelling Chain oilStarting and stopping Starting and StoppingCold engine Warm engineStopping Carburettor MaintenanceCorrectly adjusted carburettor Fine adjustment of the idle speed TStarter High speed jet HSpark plug Air filterTensioning the recoil spring Changing a broken recoil springWhen making adjustments Adjustment of the oil pumpMuffler Needle bearing lubricationHeated handles CS 2147W, CS 2152W Centrifugal cleaning TurboElectrical carburettor heating CS 2147WH, CS 2152WH Winter useWeekly maintenance Daily maintenanceMonthly maintenance Below you will find some general maintenance instructionsTechnical data Technical DataBar and chain combinations Cispr 121997, EN608 EC-declaration of conformityApplies to Europe only Page 1088890-26
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