I found this and downloaded it. No viruses, free download, searchable pdf.
http://www.scribd.com/doc/162189015/Kubota-Bx1800-Bx2200-Tractor-Workshop-Service-Manual-Searchable
http://www.scribd.com/doc/162189015/Kubota-Bx1800-Bx2200-Tractor-Workshop-Service-Manual-Searchable