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    Kubota Tractor ST alpha-30 ST alpha-35 Workshop Manual

    $16.99
    $16.99
    This manual covers the Kubota ST alpha Series, including the ST30 Alpha and ST35 Alpha models, introduced around the mid-2000s. These compact utility tractors are designed for homeowners, small farm...
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    Type: Tractor
    Vendor:
    Kubota
    Sku: 145609
    Tags: Agriculture Alpha Attachments And Parts Manuals Featured G Models KUBOTA Lawnmowers ST alpha-30 ST alpha-35 Tractor
    This manual covers the Kubota ST alpha Series, including the ST30 Alpha and ST35 Alpha models, introduced around the mid-2000s. These compact utility tractors are designed for homeowners, small farm operators, and landscape professionals, offering a blend of compact size, maneuverability, and versatility with various attachments. Key features include reliable Kubota diesel engines, a hydrostatic transmission with cruise control, and the innovative Bi-Speed Turn system for enhanced maneuverability. Kubota's long-standing heritage in producing durable and reliable agricultural machinery underpins the engineering quality of this series. This comprehensive workshop manual provides extensive service and repair information for the Kubota ST alpha Series tractors. It details procedures for assembly, disassembly, and repair across all major vehicle systems, including the engine, clutch, transmission, axles, brakes, steering, and hydraulic system. The manual also covers scheduled maintenance, troubleshooting guides, and detailed wiring diagrams. Its purpose is to equip owners, mechanics, and technicians with the necessary technical data and instructions to effectively maintain, diagnose, and repair these tractors, ensuring optimal performance and longevity.
    🏷️ Basic Information
    Identification
    Make:
    Kubota
    Model:
    ST alpha Series (ST30 Alpha, ST35 Alpha)
    Model Variant:
    ST30 Alpha, ST35 Alpha
    Codes
    Manual Product Code:
    Not Specified
    👋 Introduction
    Market Position
    Segment:
    Compact Utility Tractor
    Target User:
    Homeowners, small farm operators, landscape professionals.
    Competitive Analysis
    Competitors:
    John Deere 1, 2 Series, Massey Ferguson GC Series, Yanmar SA Series, Mahindra eMAX Series.
    Key Features
    Features:
    Compact size, maneuverability, versatility with various attachments, reliable Kubota diesel engines, Bi-Speed Turn feature for enhanced maneuverability.
    Value Proposition
    Manual Value:
    Provides comprehensive technical data and procedures essential for maintaining and repairing the ST alpha series tractors, enabling cost-effective ownership and ensuring optimal performance.
    📋 Manual Details
    Coverage Areas
    Primary Coverage:
    Service and Repair
    Secondary Coverage:
    Assembly, Disassembly, Wiring Diagrams
    Page Count
    Estimated Page Count:
    Extensive (Full Workshop Manual)
    Manual Type
    Type:
    Workshop Manual
    Language
    Language:
    English
    Format
    File Format:
    PDF
    📖 Manual Coverage
    Systems Covered
    Engine:
    Complete engine service, overhaul, and component testing.
    Clutch:
    Clutch system inspection, adjustment, and replacement procedures.
    Transmission:
    Manual and/or power-shift transmission service, including gear set and synchronizer repair.
    Rear Axle:
    Differential, final drive, and PTO (if applicable) service and repair.
    Brakes:
    Brake system diagnostics, repair, and fluid specifications.
    Front Axle:
    Front axle assembly, steering knuckles, and hub service.
    Bi Speed Turn:
    Specific service and operational details for the Bi-Speed Turn system.
    Steering:
    Hydraulic and mechanical steering system repair and component replacement.
    Hydraulic System:
    Complete hydraulic system troubleshooting, pump, valve, cylinder, and implement control service.
    Electrical System:
    Comprehensive wiring diagrams, component testing, and electrical system troubleshooting.
    Procedures Included
    Maintenance:
    Scheduled maintenance, lubrication, filter replacement, fluid checks.
    Repair:
    Detailed step-by-step repair instructions for all major vehicle systems.
    Assembly Disassembly:
    Complete procedures for removing and installing all major components and sub-assemblies.
    Troubleshooting:
    Diagnostic flowcharts and symptom-based troubleshooting guides.
    Wiring Diagrams:
    High-quality, detailed electrical wiring schematics for the entire tractor.
    Technical Depth
    Depth:
    Comprehensive from basic maintenance to complete engine and transmission rebuilds.
    📊 Manual Specifications
    File Format
    Quality:
    High Quality PDF
    Searchability:
    Assumed searchable text (typical for professional PDF manuals)
    Print Quality
    Printability:
    All pages are printable
    Binding Type
    Type:
    Digital Download (No Physical Binding)
    Paper Type
    Type:
    N/A (Digital PDF)
    ⚙️ Engine Specifications
    Primary Engine
    Engine Family:
    Kubota D1803 (ST30 Alpha) and likely D2203 or similar (ST35 Alpha)
    Engine Type:
    3-cylinder, liquid-cooled, diesel
    Performance
    St30 Alpha Rated Hp:
    Approx. 27-28 HP (Engine Gross)
    St35 Alpha Rated Hp:
    Approx. 32-34 HP (Engine Gross)
    Fuel Type:
    Diesel
    Fuel System
    Injection Type:
    Indirect Injection (IDI) or Direct Injection (DI) depending on specific engine variant within D1803/D2203 family.
    Fluid Specifications
    Engine Oil Type:
    Kubota UDT (Universal Transmission Diesel) or API CD/CE equivalent SAE 10W-30 or 15W-40 (refer to manual for exact specification).
    Coolant Type:
    Ethylene Glycol based antifreeze, 50/50 mix with distilled water.
    Maintenance
    Oil Change Interval:
    Typically 50-100 hours or annually (refer to manual for precise interval).
    Fuel Filter Replacement:
    Recommended at specified intervals or as needed due to contamination.
    🔧 Transmission
    Standard
    Type:
    Hydrostatic Transmission (HST) with variable speed control.
    Optional
    Type:
    Not specified as optional, HST is standard for this series.
    Features
    Cruise Control:
    Often included with HST models for maintaining set speed.
    Bi Speed Turn:
    Integrated system for tighter turning radius, activated by steering angle.
    Fluid Specifications
    Transmission Fluid Type:
    Kubota UDT (Universal Transmission Diesel) fluid.
    Maintenance
    Transmission Fluid Change Interval:
    Typically 400-500 hours or every 2 years (refer to manual for precise interval).
    📐 Dimensions
    Exterior
    Overall Length:
    Varies by configuration, typically around 100-115 inches (250-290 cm).
    Overall Width:
    Varies by configuration, typically around 50-60 inches (127-152 cm).
    Wheelbase:
    Varies by configuration, typically around 65-70 inches (165-178 cm).
    Weights
    Operating Weight:
    Approximately 1800-2200 lbs (816-1000 kg) without implements.
    Drawbar Hitch Capacity:
    Varies, typically rated for light-duty towing.
    🛡️ Safety Features
    Ratings
    Rollover Protection:
    ROPS (Roll-Over Protective Structure) equipped as standard on most configurations.
    Active Features
    Parking Brake:
    Independent parking brake system.
    Lighting:
    Headlights, taillights, and work lights (depending on trim/options).
    Passive Features
    Seatbelt:
    Operator presence sensing seatbelt, often with an alarm.
    Operator Presence Control:
    Features that disengage PTO and/or transmission when the operator leaves the seat.
    💡 Technology Features
    Infotainment
    Features:
    Primarily functional displays for engine RPM, temperature, fuel level, and warning lights. No advanced infotainment systems typical of automotive vehicles.
    Driver Assistance
    Features:
    Bi-Speed Turn system is a key technological feature enhancing maneuverability. Cruise control for HST models.
    Connectivity
    Features:
    No modern connectivity features (Bluetooth, Wi-Fi, etc.). Focus is on core tractor operation.
    🔧 Maintenance
    Service Intervals
    Engine Oil Filter Change:
    Refer to manual, typically 50-100 hours.
    Fuel Filter Replacement:
    Refer to manual, often tied to hours or service intervals.
    Hydraulic Fluid Filter Change:
    Refer to manual, typically 400-500 hours.
    Air Filter Inspection Replacement:
    Inspect regularly, replace as needed or per manual schedule.
    Fluid Specifications
    Hydraulic Oil Type:
    Kubota UDT (Universal Transmission Diesel) fluid.
    Transmission Fluid Type:
    Kubota UDT (Universal Transmission Diesel) fluid.
    Brake Fluid Type:
    Refer to manual, typically a specific hydraulic brake fluid.
    Known Issues
    Common Wear Items:
    Hydraulic hoses, PTO clutch wear, hydrostatic pump/motor wear at high hours, seat suspension wear.
    Diagnostic Challenges:
    Troubleshooting HST system issues requires specialized knowledge and diagnostic tools often found in a workshop manual.
    📚 Vehicle History
    Brand Heritage
    Heritage:
    Kubota is a Japanese manufacturer with a long history of producing high-quality agricultural and construction machinery, known for their reliability and durability.
    Model Evolution
    Series Development:
    The ST alpha series represents an evolution of Kubota's compact tractor line, focusing on enhanced operator comfort, improved performance, and advanced features like the Bi-Speed Turn.
    Production
    Manufacturing Location:
    Primarily manufactured in Japan and/or other Kubota facilities globally.
    Introduction Period:
    The ST alpha series was introduced around the mid-2000s.
    🏆 Awards & Recognition
    Recognitions
    Industry Awards:
    Not typically awarded like passenger vehicles; focus is on performance and reliability in its class.
    Ratings
    Operator Feedback:
    Generally high operator satisfaction for ease of use, maneuverability, and durability.
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