My son was mowing the pasture and hit something that made enough noise that he stopped to look. The cutter still ran but on inspection he found the slip cutch did not slip (or did not slip enough) and the shear bolt took a hit. It sheared off the end right where it comes through the collar but on the opposite side the bolt head is still on. When you turn the head the bolt turns but does not come out and the drive shaft moves in and out so I suspect the bolt is bent. I tried driving it out but with no success. Short of welding a rod to the head and using a slap hammer to try to back it out anyone have any bright ideas?