We may have found other answers which could help you.
Click here for Bell 8 ProjectorCanon S400 projector - take up reel does not turn?
How can I repair take up reel when it doesn't spin?
Bell & Howell projector?
How do you replace the belt on a Bell & Howell #1421 Super 8 Projector?
Lamp holder?
How can I change the drive belt on my Eumig 610D projector?