Hi JWL Sorry but I don't know where you would get detailled instructions , I can only suggest you take your time and don't force anything !... It may help you if you take some closeup photos of each side first ...( before you start work ) ... also have a 9v battery handy as you may need to revolve the drive wheels / axles ? ( unless this is a Tender drive model. ) .. I hope that helps a bit. Regards ... Stay safe & good luck.... Derek