I have a 2005 F-350 6.0 and I need to replace the evaporator core. There is an aluminum shield on the evaporator case - how is it removed? How do I get the evaporator cover off? I don't need to remove the whole assembly just the cover. Also I don't have a shop manual is there anyone that could post those pages or e-mail them to me? I have removed the accumulator, orifice tube and cycling switch only the evaporator is left. Any help would be appreciated. Thanks.