First, check the chain for any bending (sideways), or broken/damaged links/teeth. If ok, clean the drive area and the oil passages in the drive end of the bar, then fit the bar and push it back toward the saw. Place the chain over the sprocket (which you checked for any damage as well), then work the chain over the bar (make sure the bottom run of chain cuts toward you). Pull the bar out as far as the chain permits, then fit the cover making sure that the adjustment tang fits into one of the large holes and run the mounting fasteners up finger tight. Turn the adjustment screw CW until the chain pulls up to the lower side of the bar, but it can still be pulled by hand. Tighten the fasteners firmly and recheck the chain. Finally, run the tip of the bar near some cardboard for several moments--it should throw off a thin line of oil onto the cardboard. Hope this helps!
Answers & Comments
First, check the chain for any bending (sideways), or broken/damaged links/teeth. If ok, clean the drive area and the oil passages in the drive end of the bar, then fit the bar and push it back toward the saw. Place the chain over the sprocket (which you checked for any damage as well), then work the chain over the bar (make sure the bottom run of chain cuts toward you). Pull the bar out as far as the chain permits, then fit the cover making sure that the adjustment tang fits into one of the large holes and run the mounting fasteners up finger tight. Turn the adjustment screw CW until the chain pulls up to the lower side of the bar, but it can still be pulled by hand. Tighten the fasteners firmly and recheck the chain. Finally, run the tip of the bar near some cardboard for several moments--it should throw off a thin line of oil onto the cardboard. Hope this helps!