🏷️ Basic Information Identification Make: Fendt Model: 309 Vario, 310 Vario, 311 Vario, 312 Vario Generation: COM III (Common Rail Stage III / Tier 3) Codes Engine Code Family: Deutz TCD 2012 L04/L06 (or similar AGCO Power engines) 👋 Introduction Market Position Market Segment: Premium compact to mid-size agricultural tractors. Competitive Analysis Competitors: John Deere 5R Series, Massey Ferguson 4700 Series, Claas Arion 400 Series, New Holland T4 Series. Key Features Transmission Type: Fendt Vario (Continuously Variable Transmission) - a major selling point for efficiency and ease of operation. Engine Technology: Common Rail (COM III) technology for improved fuel efficiency, emissions control, and performance. 📋 Manual Details Coverage Areas Coverage: Complete workshop service and repair procedures for Fendt 300 Vario COM III series tractors. Page Count Page Count: Not specified in product info, but assumed to be extensive for a complete workshop manual. Manual Type Manual Type: Workshop Service Repair Manual Language Language: English (assumed, typical for service manuals of this nature) Format Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine (maintenance, troubleshooting, overhaul), Fuel System (injection, pumps, filters), Cooling System, Exhaust System, Transmission (Vario CVT - maintenance, diagnostics, repair), Drivetrain (axles, differentials, PTO). Hydraulics: Hydraulic system (pumps, valves, cylinders, hoses), EHR (Electronic Height Regulation), hitch control, auxiliary hydraulic circuits. Electrical: Electrical system (wiring diagrams, components, charging system, starter, lighting), control units, sensors, diagnostic connectors. Chassis And Body: Braking system (service brakes, parking brake), steering system (hydrostatic power steering), suspension (if applicable to specific models), cab (HVAC, controls, interior trim, doors, glass), chassis components, fenders, drawbar. Procedures Included Maintenance: Scheduled maintenance (oil changes, filter replacements, lubrication), pre-operation checks, seasonal maintenance. Troubleshooting: Diagnostic procedures for common faults, electrical system diagnostics, hydraulic system diagnostics, engine performance issues. Repair: Component removal and installation, major overhauls, adjustments, calibration procedures. Technical Data: Torque specifications, clearances, fluid capacities, electrical schematics, diagnostic trouble codes (DTCs). Technical Depth Depth: Comprehensive, covering all aspects from routine maintenance to major component overhauls and advanced diagnostics. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: High quality, designed for clear reproduction of text and images. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Manufacturer: Deutz or AGCO Power Engine Model Family: TCD 2012 / L04 (4-cylinder) or L06 (6-cylinder depending on specific model variant within 309-312 range) Performance Horsepower Range: Approximately 90-130 HP (subject to specific model 309, 310, 311, 312 and potential power boost features). Torque Characteristics: High torque at low RPM, characteristic of modern diesel engines with common rail injection. Fuel System Fuel Injection Type: Common Rail Direct Injection (CRDI) Emission Standard: COM III (Stage III / Tier 3) 🔧 Transmission Standard Transmission Type: Fendt Vario (ML 70 / ML 85 / ML 90 series depending on model and power output) Optional Optional Features: Different PTO speed configurations, potentially front PTO options. Features Cvs Functionality: Infinitely variable speed control, cruise control functions, TMS (Tractor Management System) integration. 📐 Dimensions Exterior Wheelbase Range: Approx. 2400-2500 mm (typical for this class, specific values in manual). Weights Operating Weight: Approx. 4,000-5,000 kg (unballasted, specific values in manual). 🛡️ Safety Features Ratings Rollover Protection: ROPS (Roll Over Protective Structure) certified cab. Active Features Braking System: Hydraulic-actuated wet disc brakes. Passive Features Seatbelt: Operator seatbelt. 💡 Technology Features Infotainment Cab Features: Climate control (A/C), ergonomic controls, advanced operator interface (e.g., digital display). Driver Assistance Tractor Management System: TMS for automatic management of engine and transmission for optimal performance and fuel economy. Connectivity Diagnostic Ports: OBD-II or manufacturer-specific diagnostic connectors for engine and transmission control units. 🔧 Maintenance Service Intervals Engine Oil Change: Typically 500 hours (refer to manual for exact specification based on oil type). Hydraulic Oil Change: Typically 1200-2000 hours (refer to manual). Fluid Specifications Engine Oil Type: API CJ-4 or ACEA E7/E9 synthetic or semi-synthetic diesel engine oil, viscosity grade SAE 10W-40 or 15W-40 (check manual for exact spec and API/ACEA ratings). Hydraulic Transmission Fluid: AGCO UTTO/THF (Universal Tractor Transmission Oil / Tractor Hydraulic Fluid) or specific Fendt recommended fluid (e.g., Valtra Trans TDL, John Deere Hy-Gard, CASE IH TRACTOR HYDRAULIC FLUID - consult manual for exact spec). Coolant Type: Ethylene Glycol based antifreeze/coolant (e.g., G12+ or similar) with appropriate corrosion inhibitors, mixed 50/50 with distilled water. Known Issues Common Wear Points: Hydraulic pump wear, Vario transmission wear components, electronic sensor failures, exhaust gas recirculation (EGR) system issues (if applicable). Diagnostics Complexity: Due to the sophisticated electronics and Vario transmission, specialized diagnostic tools and knowledge are often required for complex issues, which this manual aims to provide. 📚 Vehicle History Brand Heritage Brand Origin: Germany Model Evolution Fendt Vario Introduction: The Vario transmission revolutionized tractor technology when introduced by Fendt, offering unparalleled efficiency and operator comfort. Production Production Period Estimation: The COM III (Stage III/Tier...