The David Brown 850 / 950 Implematic tractors, manufactured in the United Kingdom, represent a significant era in agricultural machinery, popular during the late 1950s and 1960s. These robust tractors are distinguished by their advanced Implematic hydraulic system, a notable development that provided efficient hydraulic lift and draft control for mounted implements. Powered by reliable David Brown 4-cylinder diesel engines, typically producing between 40-50 horsepower, these models were engineered for durability and performance in demanding agricultural applications. Their solid construction and practical design have made them enduring machines for owners, mechanics, and restoration enthusiasts alike. This comprehensive factory service repair workshop manual provides in-depth technical information for the David Brown 850 / 950 Implematic tractors. It covers essential areas including hydraulics, engine service, transmission and drivetrain, electrical systems, cooling, fuel, braking, steering, and chassis maintenance. The manual includes detailed procedures for routine maintenance, major repairs, component disassembly and reassembly, troubleshooting guides, and precise adjustment instructions. With hundreds of pages featuring detailed photos and diagrams, this English-language resource is designed to assist owners, mechanics, and technicians in effectively maintaining, diagnosing, and repairing these classic tractors, ensuring their continued operational longevity. 🏷️ Basic Information Identification Make: David Brown Model: 850 / 950 Implematic Product Type: Tractor Service & Repair Workshop Manual 👋 Introduction Market Position Target Audience: Owners, mechanics, technicians, and restoration enthusiasts of David Brown 850/950 Implematic tractors. Competitive Analysis Value Proposition: Provides comprehensive, factory-level technical information for essential maintenance and repair, eliminating the need for costly professional diagnostics or service. Key Features Content Quality: Hundreds of pages with detailed photos, diagrams, and step-by-step instructions. Accessibility: Instant download for immediate access on various devices. Completeness: Full factory workshop manual, covering all aspects of repair and servicing. 📋 Manual Details Coverage Areas Primary Coverage: Hydraulics, Service, Repair, Troubleshooting Page Count Estimated Pages: Hundreds Manual Type Type: Factory Service Repair Workshop Manual Language Language: English Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Hydraulics System: Comprehensive coverage of the Implematic hydraulic system, including pump, control valve, cylinders, and linkage. Engine Service: Detailed procedures for engine maintenance, overhaul, and troubleshooting. Transmission And Drivetrain: Information on gearbox, differential, rear axle, and PTO maintenance and repair. Electrical System: Wiring diagrams, component testing, and troubleshooting for the tractor's electrical systems. Cooling System: Radiator, thermostat, water pump, and fan maintenance and repair. Fuel System: Carburetor or fuel injection system servicing, fuel pump, and filter replacement. Braking System: Brake adjustment, lining replacement, and hydraulic system maintenance. Steering System: Steering box maintenance, linkages, and wheel alignment procedures. Chassis And Bodywork: Frame, fenders, dashboard, and operator controls repair and adjustment. Power Take Off Pto: Service and repair procedures for the PTO engagement and drive mechanism. Instrumentation And Controls: Information on dashboard gauges, levers, pedals, and switches. Procedures Included Troubleshooting Guides: Extensive troubleshooting charts for common and uncommon issues. Routine Maintenance: Step-by-step instructions for all scheduled maintenance tasks. Major Repairs: Detailed procedures for complete engine rebuilds, transmission overhauls, and hydraulic system repairs. Component Disassembly And Reassembly: Highly detailed exploded diagrams and instructions for every component. Adjustment Procedures: Precise adjustment instructions for clutch, brakes, linkage, and more. Torque Specifications: Accurate torque values for all critical fasteners. Hydraulic System Calibration: Procedures for calibrating the hydraulic control system for optimal performance. Engine Timing Adjustment: Details on setting ignition timing and valve clearances. Wheel Alignment And Tracking: Specifications and procedures for ensuring correct wheel alignment. Technical Depth Depth: Professional-grade, suitable for mechanics and experienced technicians. Diagnostic Procedures: In-depth diagnostic procedures for identifying and resolving mechanical and electrical faults. Illustrations: Hundreds of detailed photos and diagrams, including exploded views. 📊 Manual Specifications File Format Format: PDF Searchability: Likely contains searchable text, facilitating quick access to information. Print Quality Printability: Full page printing capability. Binding Type Binding: Digital Download (No physical binding) Paper Type Paper: Digital (Printable on standard paper) Licensing Usage Rights: Lifetime use, unlimited devices, no expiry. Compatibility Operating Systems: Windows and macOS compatible. ⚙️ Engine Specifications Primary Engine Engine Type: David Brown 4-cylinder diesel engine (specific model designation not provided in product info, but typically AD4/55 or similar variants). Performance Horsepower: 850 model typically around 40-45 HP, 950 model typically around 45-50 HP (depending on specific engine variant and tuning). Torque: Specifications vary by engine variant but generally optimized for torque at lower RPMs for agricultural work. Fuel System Fuel Type: Diesel Injection System: Typically indirect injection, possibly rotary or inline injection pump (e.g., CAV Simms or similar). Cooling System Cooling Method: Water-cooled, pressurized system. 🔧 Transmission Standard Gearbox Type: Constant mesh gearbox with multiple forward and reverse gears. Optional Powershift Options: Likely offered with options for enhanced PTO or creeper gears. Features Drive Type: 2WD (Rear Wheel Drive) Hydraulic Lift: Implematic system for 3-point linkage (Category 1 or 2). 📐 Dimensions Exterior Wheelbase: Approximately 70-76 inches (178-193 cm). Weights Operating Weight: Approximately 3500-4500...