Question about Craftsman 18" Chain Saw Replacement Bar 36638 3619

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Chain jumps off guide - Craftsman 18" Chain Saw Replacement Bar 36638 3619

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Remove the bar and chain. Lay the chain out on a bench or table--inspect it for sideways bent or broken links. Check the chain drive teeth for damage as well as the sprocket drive teeth. Inspect the bar chain groove for damage or sideways bending, also the tip sprocket for free turning. Start the engine after cleaning the bar mounting area on the side of the engine, it should ooze out oil after running for a short time. Clean the bar drive-end oil passages which run out to the chain groove. Clean the entire chain groove. If all checks ok, re-assemble the bar and chain, but leave the mounting fasteners finger tight. Tighten the chain until it pulls up to the bar bottom, but not so tight that you can't move the chain by hand. Tighten the bar fasteners firmly and recheck the chain tension. Start the engine and run the bar tip near some cardboard at speed for a few moments--it should throw off a thin line of oil. Hope this helps!

Posted on Jul 23, 2010

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