This sale is for the cylinder head assembly off a John Deere 6×4 Gator with model 3007D003 (3TN66C-EJUV) yanmar diesel. Its in good used working condition. We will do our best to answer them as quickly as possible and for faster response please don’t hesitate to call. Irelands Sales & Service. We guarantee all equipment and parts to be in good working order unless otherwise stated in description. Irelands Sales & Service is a small locally owned business that specializes mostly in used john deere lawn and garden equipment/parts. We are located minutes outside Westminster just off the main highway route 140.