In this video tutorial, viewers learn how to maintain the guide bar of a chainsaw. Begin by removing the guide bar from the chainsaw. Unscrew the two nuts on the side of the saw and then remove the chain. Now rest the guide bar at an angle and scrape off the metal bur, using a flat file. Simply run the file down the guide bar until it is clear of any bur. Then use a tool to scrape any debris that is inside the groove of the guide bar. This video will benefit those viewers who are in the construction trades or have a chainsaw, and would like to learn how to maintain the guide bar for good performance and efficiency.