I've inherited a Kenmore canister vacuum from my mother and nothing came with it. It is Model 116.23155301C - #07091. The inside has dirt etc. in places I don't think it should be. Since I don't have a manual I am at a loss as to what the different parts are, whether they come out and how to do it. Would very much appreciate your help, or a diagram or something. Thanks, Gale Kaffka