Jonsered CS 2171WH manual Chain brake and front hand guard

Page 5

SAFETY INSTRUCTIONS

Chain brake and front 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 front hand guard acts as a counterweight in case of kickback).

The brake is applied when the front 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 front 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 front 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.

English – 5

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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 Throttle lock Stop switchChain catcher Right hand guardChecking brake band wear MufflerChecking the front hand guard Checking the inertia brake releaseThrottle lock Stop switchChain catcher Right hand guardGeneral rules Cutting equipmentCutting equipment designed to minimise kickback MufflerChain Sharpening your chain and adjusting raker clearanceSome terms that describe the bar and chain General information on sharpening cutting teethSharpening cutting teeth Setting the raker clearance General advice on setting raker clearanceTensioning the chain If the raker clearance is too largeLubricating cutting equipment What is kickback? How to avoid kickbackChecking wear on cutting equipment Chain drive sprocketDo not let go of the handles Starting General safety precautionsBasic safety rules Fuel safetyGeneral working instructions Transport and storageTerms Basic cutting techniqueGeneral Limbing CuttingSafe distance Tree felling techniqueFelling direction Clearing the trunk and preparing your retreatFelling cut Cutting the trunk into logsFreeing 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 chainFuel Fuel HandlingPetrol Two-stroke oilMin 3 m 10ft Chain oilFuelling Starting and stopping Starting and StoppingCold engine Warm engineStopping Carburettor with movement limiters MaintenanceCarburettor adjustment Correctly adjusted carburettor Fine adjustment of the idle speed TCarburettor without movement limiters Low speed jet LIdle speed, rpm Recommended engine speeds are as followsAir filter StarterWhen making adjustments Adjustment of the oil pumpSpark plug MufflerCooling system Centrifugal cleaning TurboHeated 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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