We may have found other answers which could help you.
Click here for Projector Repair Film
Bell & Howell Autoload 245BA lower sprocket won't turn?
How can I repair take up reel when it doesn't spin?
How can I fix my Bell&Howell 8mm multi motion projector?
how do I open bell & howell 356a projector to change belt?
bell and howell filmosound 8 model 458A?
How to install belt on Bell & Howell 33ST?