Body Cover on top of valves, such as Erie 568, 2000, 2001, 2400 Part number 568-254-3 and labeled # 3 in our diagram ( Part number 71083 and label # 4 in newer service manuals ).* The O-ring required with this cover ( you might want a new one, since not included with the new cover ) = PE1851541Listed below as a Related Product.