🏷️ Basic Information Identification Make: David Brown Model: 850 / 950 Implematic Product Type: Workshop Repair Manual Codes Product Code Identifier: 850_950_implematic_workshop_manual_download 👋 Introduction Market Position Target User: Professional technicians, mechanics, DIY enthusiasts, restorers Key Features Content Value: Comprehensive repair, service, and maintenance guidance Usability: Step-by-step instructions, clear illustrations, troubleshooting support 📋 Manual Details Coverage Areas Primary Focus: Repair, Service, Restoration, Maintenance, Rebuild, Diagnosis Page Count Estimated Page Count: Varies (Up to 5GB file size suggests comprehensive coverage) Manual Type Type: Workshop Service Repair Manual / Factory Manual Language Language: English Format Format: Digital Download (PDF, potentially zipped) 📖 Manual Coverage Systems Covered Engine: Detailed breakdown, troubleshooting, repair, overhaul Transmission: Service, repair, adjustment procedures Hydraulic System: Implematic system operation, repair, maintenance Fuel System: Carburetor/injection system troubleshooting and repair Electrical System: Wiring diagrams, component testing, troubleshooting Cooling System: Radiator, thermostat, water pump service Lubrication System: Oil pump, filter, lubrication points and procedures Braking System: Brake adjustment, repair, and maintenance Steering System: Steering box and linkage service Frontend And Rear Axles: Differential and axle repair Power Take Off Pto: PTO operation and repair Chassis And Body: Frame inspection, panel repair Procedures Included Preventative Maintenance: Detailed schedules and procedures Troubleshooting: Diagnostic trees and common problem resolution Routine Maintenance: Oil changes, filter replacements, lubrication Engine Rebuild: Complete engine disassembly, inspection, and reassembly Component Overhaul: Detailed instructions for major component rebuilds Adjustments: Clutch, brakes, engine timing, hydraulic systems Technical Depth Depth: Comprehensive: From basic checks to full rebuilds and diagnostics Illustrations: Clear, step-by-step illustrated instructions Component Breakdowns: Detailed exploded views and part number breakdowns 📊 Manual Specifications File Format Format: PDF (Portable Document Format) Compatibility: Windows, Linux, Mac, iPad, and other devices with PDF reader Print Quality Printability: Printable on any computer and printer Restrictions: No printing or saving restrictions Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper Type: Not Applicable (Digital Download) File Size Maximum Size: Up to 5 GB Delivery Method Method: Instant Digital Download ⚙️ Engine Specifications Primary Engine Engine Type: David Brown Diesel (e.g., AD4/45, AD4/55 based on model variant) Engine Type Cylinders: 4-Cylinder (typical for this era and model range) Bore X Stroke: Specific to engine variant (e.g., ~3.5" x 4.5" for AD4/55) Performance Horsepower 850: Approx. 50-55 HP (Gross) Horsepower 950: Approx. 55-65 HP (Gross) Fuel System Injection Type: Indirect Injection (IDI) via CAV or Simms injection pumps Carburetion: If applicable, details on specific carburetor models would be covered. Lubrication Oil Capacity: Approx. 10-12 pints (5-6 liters) depending on filter type Cooling System Coolant Capacity: Approx. 16-18 pints (8-9 liters) 🔧 Transmission Standard Type: David Brown Implematic Gearbox (Constant Mesh) Features Gear Speeds: Typically 10 Forward / 2 Reverse speeds (main gearbox + creeper range if fitted) Clutch: Dual-Stage Clutch (Live PTO and transmission) Pto: Live PTO (540 RPM standard) Fluid Specifications Transmission Oil: API GL-4, SAE 90 or 80W-90 Gear Oil (or equivalent specified by manufacturer) 📐 Dimensions Weights Operating Weight: Approx. 4,500 - 5,500 lbs (2040 - 2500 kg) depending on configuration Drawbar Horsepower: Typically 40-50 HP for 850 models, 45-55 HP for 950 models 💡 Technology Features Infotainment Audio System: Not applicable for this era of tractor. Driver Assistance Traction Control: Not applicable for this era of tractor. Connectivity Bluetooth: Not applicable for this era of tractor. 🔧 Maintenance Service Intervals Engine Oil Change: Every 150-200 operating hours or annually Oil Filter Replacement: With every oil change Air Filter Service: Check every 50 operating hours, clean/replace as needed Fuel Filter Replacement: Every 400-500 operating hours or as required Fluid Specifications Engine Oil Type: API CD or CE rated Diesel Engine Oil, SAE 15W-30 or 10W-30 (depending on climate) Hydraulic Transmission Oil: David Brown Specification UTTO (Universal Tractor Transmission Oil) or equivalent meeting MIL-L-2105D Known Issues Implematic System: Potential for hydraulic pump wear, control valve issues, or lift arm sticking if not regularly serviced or if contaminated oil is used. Engine Starting: Glow plug issues or fuel system airlocks can affect cold starting. Transmission Grinding: Worn synchros or shifting collar issues can lead to grinding. Ensure correct fluid levels and type. Technical Data Torque Settings: Specific torque values for critical components like cylinder head, main bearings, etc., are detailed in the manual. Valve Clearance: Specific intake and exhaust valve clearances provided for engine tuning. 📚 Vehicle History Brand Heritage Manufacturer: David Brown Tractors Ltd., UK Model Evolution Series Introduction: The 850/950 Implematic models represent a significant development in David Brown's tractor line, particularly with the integrated Implematic three-point hitch system. Production Production Period: Late 1950s to mid-1960s (specific years for 850/950 variants may vary) 🏆 Awards & Recognition Recognitions Industry Standing: David Brown tractors were known for their robust construction and reliable performance, making them popular in agricultural and industrial applications.