The Kubota STa-30 and STa-35 are robust diesel-powered compact tractors designed for a variety of agricultural, landscaping, and property maintenance tasks. Renowned for Kubota's heritage of engineering quality and reliability, these models offer user-friendly operation and versatility. Key features include a hydrostatic transmission with dual-speed functionality and advanced driver assistance systems like the Bi-Speed Turn, enhancing maneuverability. Safety is paramount, with standard equipment including a Roll Over Protection System (ROPS), seat belt, and parking brake, ensuring secure operation for owners, agricultural professionals, and farm equipment technicians. This professional technical service and repair manual provides comprehensive coverage for the Kubota STa-30 and STa-35. It details essential maintenance procedures, troubleshooting guides, and technical specifications across all major systems, including the engine, clutch, transmission, rear axle, brake, front axle, Bi-Speed Turn, steering, hydraulic system, and electrical system. The manual's step-by-step instructions, diagnostic procedures, and high-resolution diagrams are designed to empower both DIY enthusiasts and experienced mechanics to effectively maintain, diagnose, and repair these tractors, ensuring optimal performance and longevity.