Jonsered CS 2156 manual Chain brake and front hand guard

Page 6

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.

•During felling your left hand grasps the front handle in such a way that it cannot activate the chain brake. In this position, i.e. when your left hand is in such a position that

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Contents EPA KEY to Symbols Key to symbolsContents EPA Safety Instructions Machine′s safety equipmentPersonal protective equipment Chain brake and front hand guard Chain catcher Stop switchThrottle lock Right hand guardMuffler Checking brake band wearChecking the front hand guard Throttle lock Checking the inertia brake releaseChecking the brake trigger Chain catcherGeneral rules Stop switchCutting equipment Vibration damping systemChain Cutting equipment designed to minimise kickbackBar Some terms that describe the bar and chainSharpening cutting teeth Sharpening your chain and adjusting raker clearanceGeneral information on sharpening cutting teeth With a badly sharpened chainTensioning the chain General advice on setting raker clearanceSetting the raker clearance If the raker clearance is too largeFilling with chain oil Lubricating cutting equipmentChain oil Checking chain lubricationNeedle bearing lubrication Checking wear on cutting equipmentChain drive sprocket How to avoid kickback What is kickback?Do not let go of the handles General safety precautions StartingGeneral working instructions Fuel safetyBasic safety rules Transport and storageBasic cutting technique GeneralTerms Cutting LimbingFelling direction Tree felling techniqueSafe distance Clearing the trunk and preparing your retreatFelling cut Cutting the trunk into logs General adviceFreeing a tree that has fallen badly Freeing a trapped treeWhat is WHAT? What is what on the chain saw?Assembly Fitting the bar and chainFuel Handling FuelFollowing applies to chain saws with catalytic converters Chain oil FuellingCold engine Starting and StoppingStarting and stopping Warm engineStopping Maintenance CarburettorChanging a broken or worn starter cord Correctly adjusted carburettorStarter Tensioning the recoil springMuffler Air filterSpark plug Fitting the starterWhen making adjustments Adjustment of the oil pumpCentrifugal cleaning Turbo Needle bearing lubricationHeated handles CS 2156W, CS 2159W Temperature 0 C 32 F or colderTemperature -5C 23 F or colder Electrical carburettor heating CS 2156WH, CS 2159WHDaily maintenance Weekly maintenance Monthly maintenanceBelow you will find some general maintenance instructions Technical Data Technical dataBar Length Pitch, inch Max nose Chain Inches Radius 050/1,3 mm 20BP063/1,6 mm 22BP Federal Emission Control Warranty Statement Your Warranty Rights and Obligations1088891-95
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