I have just purchased a 2008 Allegro 34TGA with a 22000 Workhorse chassis. I have the Tiffin and Workhorse manuals. Neither of them describes how to remove the engine cover. I would like to be able to do simple maintenance like checking/changing air filter, belts etc... Does anyone know where this info may be obtained and also if there is a manual for doing simple mechanical maintenance. Thanks.