Place the chainsaw on a level surface.
Remove the nut on the right side at the tip of the bar with the crescent wrench. Pull off the nose guard. Discard the old guard.
Place the new nose guard to the tip of the bar, and slide the bolt that is welded to the bar nose guard through the left side of the hole on the chainsaw bar.
Tighten the nut onto the bar nose guard bolt using the crescent wrench. Re-tighten the nut before each use to ensure safety.