From the looks of the shape that machine is in, it probably also needs and oil change and the wheels removed and greased (most people don't know how to do either) It hard to see what our doing with your hands in the way of the camera. I've fixed hundreds of recoils so I know pretty much what needs to be done. The inside of the housing needs to be cleaned from and dirt debris and the shaft of the recoil need to be greased. ALso the little things you mentions that are falling out are the dogs that catch so the motor turns over. Most of them usually have springs attached to them to hold them back when not in use, so you need to be careful while working on it so they don't go flying off into the air (and you will spend all afternoon looking for one of them...)