Knowledge base for the Kubota B6001 and B7001 (the “Bulltra” series), including the B7001E (2WD) and B7001DT (4WD) and the Zen-Noh ZB6001/ZB7001. These compact diesel tractors with the Kubota D650 and D750 three-cylinder engines were popular for horticulture and small-scale earthwork. Here you’ll find buying advice, technical specifications, maintenance schedules, oil and filter info, operation, hydraulics/PTO, troubleshooting, and storage by topic — plus matching original and aftermarket parts.