Model Designation:
STa Series (STa-30, STa-35)
Product Type:
Service Repair Workshop Manual
Product Name:
Kubota STa-30 STa-35 Tractor Service Repair Workshop Manual
Vin Code Prefix:
N/A (Tractor Serial Numbers apply)
Generation Identifier:
Specific to STa Series (STa-30, STa-35) models
Market Position:
Targeted towards owners and service technicians of Kubota STa-30 and STa-35 compact tractors, providing essential repair and maintenance data.
Target User:
DIY tractor owners, farm mechanics, and professional service technicians.
Competitive Analysis:
Offers a cost-effective solution for maintaining Kubota tractors compared to dealership service, ensuring proper operation and longevity.
Key Features:
• Factory authorized repair procedures
• Comprehensive system coverage
• User-friendly PDF format
• Printable for workshop use
• Step-by-step repair guidance
Ease Of Use:
The manual is described as 'very easy to install and read', empowering users to repair their tractor step-by-step.
Systems Covered:
• General Information
• Engine
• Clutch
• Transmission
• Rear Axle
• Brake System
• Front Axle
• Bi-Speed Turn System
• Steering System
• Hydraulic System
• Electrical System
Electrical System Coverage:
Wiring diagrams, component testing, troubleshooting of electrical faults, battery, starter, alternator, lighting, and safety interlocks.
Hydraulic System Coverage:
Hydraulic pump, cylinders, valves, hoses, filters, fluid reservoir, and operation of hydraulic implements.
Procedures Included:
• Step-by-step repair procedures
• Troubleshooting guides
• Maintenance procedures
• Disassembly and assembly instructions
• Component testing and adjustment
Engine Repair Procedures:
Detailed instructions for engine overhaul, including cylinder head removal/installation, piston/ring replacement, valve adjustments, fuel injector testing, and more.
Transmission Repair Procedures:
HST unit inspection, repair, and adjustment, as well as front and rear PTO troubleshooting and repair.
Steering System Repair:
Service and repair of the steering assembly, including power steering components if applicable.
Front Axle Repair:
Maintenance and repair of the front axle, including differential, drive shafts, and steering knuckles.
Rear Axle Repair:
Service and repair of the rear axle, including differential, final drives, and PTO components.
Technical Depth:
Factory-level technical information, enabling users to perform repairs from routine maintenance to complex overhauls.
Diagnostic Capabilities:
Includes diagnostic flowcharts, fault codes (if applicable), and troubleshooting trees to identify and resolve issues.
Specifications And Tolerances:
Provides all necessary technical data, specifications, clearances, and torque values required for accurate repairs.
File Format Compatibility:
PDF, compatible with all PC-based Windows operating systems and Mac.
PDF Searchability:
Likely text-searchable PDF format for efficient information retrieval.
Print Quality:
Perfect quality, allowing for clear viewing and printing of the complete manual.
Printability:
Designed for easy printing of individual sections or the entire manual.
Binding Type:
Digital Download (PDF)
Paper Type:
N/A (Digital)
Software Requirements:
Adobe PDF Reader
Engine Type:
Diesel (Specific engine model not detailed in product info, but typically Kubota D1105 or similar for this class)
Engine Displacement:
Likely around 1.1 to 1.6 liters, depending on the specific engine variant used in STa-30/35.
Horsepower Output:
STa-30: Approx. 28-30 HP, STa-35: Approx. 33-35 HP (Engine gross horsepower. PTO horsepower will be lower.)
Torque Output:
Refer to specific engine specifications in manual for precise torque figures.
Fuel System Type:
Common rail direct injection (likely for modern STa series)
Cooling System Type:
Liquid-cooled
Lubrication System Type:
Forced lubrication with oil pump
Transmission Type:
Hydrostatic Transmission (HST)
Optional Transmission:
N/A (HST is standard for this series)
Transmission Features:
• Variable speed control
• Forward and Reverse gears
• Range selection (e.g., High/Low)
Bi Speed Turn System Integration:
Coverage of the Bi-Speed Turn system, a feature that enhances maneuverability, likely integrated with the steering and transmission.
Transmission Fluid Type:
Kubota UDT Fluid or equivalent (Refer to manual for exact specification)
Transmission Fluid Capacity:
Refer to manual for specific capacity (typically 15-20 liters)
Overall Length:
Refer to manual for precise dimensions (Approx. 3-3.5 meters without implements)
Overall Width:
Refer to manual for precise dimensions (Approx. 1.5 meters)
Ground Clearance:
Refer to manual for precise ground clearance (typically 250-350 mm)
Operating Weight:
Refer to manual for precise weight (Approx. 1100-1300 kg)
Wheelbase:
Refer to manual for precise wheelbase (Approx. 1.5-1.7 meters)
Infotainment System:
Basic operator controls, no complex infotainment systems are typically featured on this class of tractor. Focus is on functional instrumentation.
Driver Assistance Features:
Features such as cruise control (if equipped), PTO engagement controls, and HST pedal operation.
Dashboard Instrumentation:
Includes indicators for engine temperature, fuel level, oil pressure, battery charge, tachometer, and hour meter.
Connectivity Options:
N/A
Engine Oil Change Interval:
Refer to manual for exact interval (typically 50-100 hours of operation)
Air Filter Replacement Interval:
Refer to manual for exact interval (depends on operating conditions)
Transmission Fluid Change Interval:
Refer to manual for exact interval (typically 200-400 hours)
Engine Oil Type:
Kubota Super UDT or API CF-4/SG SAE 10W-30 (Consult manual for precise specification)
Coolant Type:
Ethylene glycol based antifreeze (50/50 mix with distilled water)
Hydraulic Fluid Type:
Kubota UDT Fluid or equivalent (same as transmission fluid).
Common Issues:
While not inherently prone to widespread common issues, typical tractor maintenance needs include checking hydraulic fluid levels, HST filter service, and ensuring proper greasing of pivot points. The manual will address specific diagnostic procedures.
Engine Oil Filter Part Number:
Refer to manual for specific part number (e.g., HH150-32430 or equivalent)
Hydraulic Transmission Filter Part Number:
Refer to manual for specific part number (e.g., UH011-42150 or equivalent)
Brand Heritage:
Kubota has a long-standing reputation for producing reliable and durable compact tractors and agricultural machinery since its founding in 1890.
Model Evolution:
The STa series represents Kubota's line of versatile compact tractors, evolving with modern engine technology, hydrostatic transmissions, and enhanced operator comfort.
Production Era:
Specific production years not detailed, but the STa series is a contemporary offering.
