🏷️ Basic Information Identification Make: David Brown Model: 850 / 950 Implematic Vehicle Type: Tractor 👋 Introduction Market Position Target User: Farm owners, mechanics, and agricultural machinery enthusiasts seeking to perform their own maintenance and repairs on David Brown 850/950 Implematic tractors. Competitive Analysis Value Proposition: Empowers users to save significantly on repair costs by providing comprehensive, step-by-step guidance with clear illustrations. Key Features Ease Of Use: Features very easy to follow, step-by-step instructions and clear pictures to simplify complex repair tasks. Accessibility: Instant email delivery upon purchase, with permanent access to the digital manual for printing or viewing on multiple devices. 📋 Manual Details Coverage Manual Type: Complete Workshop Service Repair Manual Language: English Format: PDF Download Model Variants Covered: All Models/Engines/Trim/Transmissions Types Are Covered 📖 Manual Coverage Systems Covered Engine: Comprehensive overhaul, diagnostics, fuel system, lubrication system, cooling system, exhaust system, starting and charging system. Hydraulics: Detailed coverage of the Implematic hydraulic system, including pump, valves, cylinders, hoses, and associated components; troubleshooting and repair procedures. Transmission: Overhaul and repair of gearbox, clutch, PTO, differential, and final drives. Front Axle: Steering system, kingpins, stub axles, and differential unit. Rear Axle: Brake system, hub reduction gears, and half shafts. Electrical System: Wiring diagrams, starter motor, generator/alternator, battery, lighting, ignition system, and instrumentation. Operator Controls: Steering column, throttle control, brake pedals, clutch pedal, gear levers, and PTO controls. Chassis And Bodywork: Frame, fenders, drawbar, operator platform, and mounting points for implements. Procedures Included Routine Maintenance: Lubrication schedules, fluid checks and changes, filter replacement, and general inspection procedures. Troubleshooting: Diagnostic charts and step-by-step procedures for identifying and resolving common and complex problems. Overhaul And Rebuild: Detailed instructions for complete disassembly, inspection, repair, and reassembly of major components. Component Replacement: Step-by-step guidance for replacing specific parts and assemblies. Adjustment Procedures: Correct settings and adjustments for clutch, brakes, hydraulic valves, and linkage systems. Safety Precautions: Essential safety guidelines to be followed during maintenance and repair operations. Technical Depth Depth: Comprehensive, covering from basic maintenance to complete engine and transmission overhauls, including detailed diagnostic information. 📊 Manual Specifications File Attributes File Format Quality: High-quality PDF, ensuring clarity of text and images; designed for clear printing. Printability: Printable by chapter or in its entirety. Searchability: Likely searchable text content within the PDF for easy information retrieval. Device Compatibility: Compatible with all PC & MAC Computers, tablets, and mobile phones via Adobe Reader. ⚙️ Engine Specifications Primary Engine Engine Type: Diesel (typically a 3-cylinder or 4-cylinder direct injection engine, depending on specific 850/950 variant). Performance Typical Displacement: Approx. 2.6 to 3.1 liters (exact figures vary by engine variant). Typical Horsepower: Ranges from approximately 38 HP to 52 HP (gross, depending on the specific model and engine). Typical Torque: Torque figures are significant for pulling power in this class, though precise figures vary. Fuel System Fuel Type: Diesel Injection System: Direct injection, often with rotary or inline fuel injection pumps (e.g., CAV, Bosch). Lubrication System Oil Type: API CD or CE rated diesel engine oil, SAE 30 or 20W-50 recommended depending on operating temperature. Cooling System Cooling Method: Water-cooled via a radiator and fan. 🔧 Transmission Standard Transmission Type: David Brown Implematic gearbox (a non-synchronized constant mesh transmission offering multiple forward and reverse gears). Optional Other Options: Varying gear configurations and PTO options depending on the specific 850/950 variant. Features Clutch: Dual-stage clutch (for transmission and PTO engagement). Fluid Specifications Gearbox Oil: API GL-4 SAE 90 or 80W-90 gear oil for transmission and differential. 📐 Dimensions Exterior Wheelbase: Varies by model, typically around 75-80 inches (approx. 1905-2032 mm). Weights Unladen Weight: Approximately 3,500 - 4,500 lbs (1588 - 2041 kg), depending on configuration. 🛡️ Safety Features Ratings Safety Standards: Reflects safety standards of its era; manual covers safe operation and maintenance procedures. Active Features Braking System: Drum brakes or sometimes disc brakes on later models, typically mechanical actuation. Passive Features Operator Station: Open operator station with foot pedals, steering wheel, and hand controls; safety often relies on operator awareness and adherence to safe practices. 💡 Technology Features Infotainment Features: Basic instrumentation: ammeter, oil pressure gauge, temperature gauge, and tachometer. No modern infotainment systems. Driver Assistance Features: None; technology is focused on mechanical function and operator control. Connectivity Features: N/A 🔧 Maintenance Service Intervals Engine Oil Change: Typically every 100-150 operating hours or annually. Fuel Filter Replacement: As needed, or at regular intervals (e.g., annually or every 250 hours). Hydraulic Filter Replacement: Recommended at specified intervals or when hydraulic performance degrades. Fluid Specifications Hydraulic Fluid: David Brown Implematic Hydraulic Oil (a specialized hydraulic fluid; manual will specify exact type and viscosity, likely an ISO VG 46 or similar). Coolant: Water-glycol mixture (50/50) for freeze protection and corrosion inhibition. Known Issues Common Problems: Hydraulic system leaks or reduced lifting capacity, PTO engagement issues, wear in the transmission synchronizers (if applicable...