Recently been looking for vacuum diagrams and found that pics and diagrams are copyrighted materials and therefore impossible to find for free online. Will need to purchase manual at parts store. Sorry.
You can find great repair manuals with step-by-step instructions, diagrams, parts locations and other important information here: http://bit.ly/mitchell_repair_manuals_online
Or here: http://bit.ly/AllData_Repair_Manuals_Online