To install a chain on a Husqvarna chainsaw, start by ensuring the chainsaw is turned off, and the chain brake is engaged. Remove the guide bar cover and loosen the chain tensioning screw.Place the chain onto the guide bar, ensuring the cutting edges face forward and the drive links fit into the bar groove. Position the chain around the rear sprocket and begin tightening the chain tension by turning the tensioning screw clockwise.Check the tension by lightly pulling the chain from the bottom of the guide bar. Once properly tensioned, tighten the guide bar cover and conduct a final check before operating the chainsaw.