Timothy wrote:
On Mon, 22 May 2006 16:20:06 -0700, redskygroup wrote:

I would suspect that you have a bad bolt, a bad spindel or bad
blade.
Look to see if the bolt has been striped or is worn somehow. Mount
the blade and see if the blade is bent. A bent blade could vibrate
the bolt off. Last, inspect the spindel to ensure that the threads
are not damaged and the spindel is not bent.

If it is belt drive with a twist in the belt, a wrong twist would
cause 1 blade to go in the wrong direction. The belt on that blade
needs to be flipped. That's my guess.
Tom J