Makita UC3030A Instruction Manual

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Makita UC3030A Instruction Manual Manual pdf 12 page image

1KIJChecking the chain tensionThe chain has the proper tension when it lies against the bottomedge of the guide bar and can be easily pulled by hand about-4 mm (about 1/8") up from the guide bar.Check the chain tension frequently - new chains tend to getlonger during use!When checking the chain tension the motor must be switchedoff and the power supply plug pulled out. If the chain is tooloose: Loosen the sprocket guard quick tightener by about aquarter turn. Tighten the chain as described under “Tightene-ing the saw chain.”HInT:Use or 3 saw chains alternately for even wear of the chains,sprocket and guide bar running surfaces.In order to guarantee a uniform wear of the groove in the bar thebar should be turned over whenever replacing the chain.Chain brakeThe electric chain saw comes with an inertial chain brake asstandard equipment. If kickback occurs due to contact of theguide-bar tip with wood (see SAFETY PRECAUTIONS, page 7),the chain brake will stop the chain through inertia if the kickbackis sufficiently strong.The chain will stop within a fraction of a second.run-out brakeThe electric chain saw come with a run-out brake as standardequipment.The run-out brake ensures that the chain comes to a stopimmediately when the ON/OFF switch is released, thuspreventing the chain from continuing to run and presenting ahazard.Testing of the run-out brake is described on page 16.Chain and run-out brake maintenanceThe brake systems are very important safety features, andlike any other part they are subject to a certain amount ofwear. regular inspection and maintenance is important foryour personal safety, and can be properly performed onlyby a MAKITA service centre.Engaging the chain brake (braking)If the kickback is strong enough the sudden acceleration of theguide bar combined with the inertia of the hand guard (1) willautomatically actuate the chain brake.To engage the chain brake manually, simply push the handguard (1) forward (towards the tip of the saw) with your lefthand (arrow 2).releasing the chain brakePull the hand guard (1) towards you (arrow 3) until you feel itcatch. The brake is now released.note:When the chain brake is actuated the power supply to themotor will be cut off. Testing of the chain brake is describedon page 16.231SErVICE