<strong>Yahoo Message Number: 61995</strong>"Here is a link to the maintenance manual. They don't point to the air filter but it is right next to the grate inside the housing. <br/>http://www.cumminsonan.com/www/pdf/manuals/981-0161C.pdf"<br/>Above is link to Operator Manual, not Maintenance Manual. Cummins wants too many $ for Maintenance Manual. I have searched repeatedly for a free digital...