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Drive Sprocket Maintenance


ATTENTION: DEALERS, CHAIN SAW USERS, AND ANYONE WHO SERVICES SAW CHAIN. IMPORTANT SAFETY INFORMATION.


Warning


Always turn off your chain saw’s engine before handling the drive sprocket. Failure to do so can result in severe injury.


Your drive sprocket, the third member of the cutting team, deserves regular attention and maintenance just like your guide bar and saw chain. A misused drive sprocket will cause patterns of saw chain wear which can damage the guide bar and reduce the life of all three components. A damaged drive sprocket cannot be repaired, it can only be inspected and replaced. Here are the things to look for, and the steps to take.


Basic Drive Sprocket Maintenance Tasks s Before each use


1. s l 2. s l l Daily n Often (Hourly, or at refueling) u Weekly, periodically


3. s l


4. s n


5. s n Saw chain tension is especially important when the chain saw is tipped on its side during felling cuts. Loose saw chain (and rim-type drive sprocket, if used), will slide down and out of alignment with the guide bar. Loose saw chain tension is the leading cause of drive sprocket problems.


Note: If your chain saw has a saw chain brake, check the saw chain brake’s action according to the instructions in your chain saw operator’s manual. Be sure the saw chain brake strap around your clutch skirt is not too tight, which can lead to clutch drum overheating and failure.


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DRIVE SPROCKET


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