This manual covers David Brown 850 Implematic and 950 Implematic tractors, including their Livedrive transmission variants, produced from the late 1950s into the 1960s. These tractors, originating from the United Kingdom, are distinguished by their innovative Implematic hydraulic system, which provided advanced control for its era. The Implematic system, a key feature, managed hydraulic power and offered variable speed control, enhancing operational efficiency and implement management. This manual is designed to support owners and technicians in maintaining these robust agricultural machines. This Workshop Service & Repair Manual provides comprehensive guidance for the David Brown Implematic hydraulic system. It details the operation, fault finding, adjustments, and setting instructions for critical components such as the control valve assembly, hydraulic pump unit, ram cylinder, and automatic hold mechanism. The manual includes specific procedures for disassembly, inspection, repair, and reassembly of these hydraulic parts, along with dimensional data and a summary of design changes. Its purpose is to empower owners, mechanics, and technicians with the knowledge to effectively maintain and repair their vehicles, ensuring optimal performance and longevity of the Implematic system. 🏷️ Basic Information Identification Make: David Brown Model: 850 Implematic, 850 Implematic Livedrive, 950 Implematic, 950 Implematic Livedrive Model Variant: Standard and Livedrive Transmission Codes 850 Implematic Serial Number Range: 2B/850/30 001 To 306 350 850 Implematic Livedrive Serial Number Range: 2A/850/30 001 To 306 350 950 Implematic Serial Number Range: W/950/63 001 To 81 850 950 Implematic Livedrive Serial Number Range: V/950/63 001 To 81 850 👋 Introduction Market Position Target User: Owners, mechanics, and technicians working on David Brown 850 and 950 Implematic tractors. Competitive Analysis Value Proposition: Provides essential, in-depth technical information to perform repairs and maintenance, saving on professional service costs and preserving vehicle condition. Key Features Instructional Style: Step-by-step instructions with detailed exploded diagrams for clarity and efficient repair. Accessibility: Instant download for immediate access on various digital devices (PC, Mac, tablet, smartphone). 📋 Manual Details Coverage Areas Primary Systems Covered: Implematic Hydraulic System Specific Components Covered: Control Valve Assembly, Hydraulic Pump Unit, Top Link & Control Cable, Ram Cylinder & Ramshaft, Automatic Hold Mechanism, Three-way Valve Unit Procedural Coverage: Operation, Fault Finding, Adjustments, Setting Instructions, Dimensional Data, Summary of Design Changes Page Count Estimated Page Count: Not Specified (Comprehensive detail implied) Manual Type Manual Type: Workshop Service & Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Hydraulic System Details: In-depth coverage of the David Brown Implematic hydraulic system, including its unique operational principles and components. Procedures Included Fault Diagnosis And Repair: Detailed procedures for identifying and rectifying faults within the Implematic hydraulic system. Adjustment And Setting: Step-by-step instructions for all necessary adjustments and settings of hydraulic components to ensure optimal performance. Technical Depth Diagnostic Capabilities: Advanced troubleshooting and diagnostic techniques specific to the Implematic system. Rebuild Procedures: Comprehensive guidance for the disassembly, inspection, repair, and reassembly of hydraulic pump, control valve, and ram assemblies. Component Understanding: Detailed explanations of the function and interaction of each component within the Implematic system, including the automatic hold mechanism. 📊 Manual Specifications File Format Digital File Type: PDF Print Quality Printability: High-quality, printable for hard copy reference. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Diesel (Specific engine details not provided in product info, but typically inline diesel for these models) Performance Horsepower Range: Typically in the 30-50 HP range for 850/950 models, exact figures depend on specific engine variant. Fuel System Fuel Type: Diesel 🔧 Transmission Standard Transmission Type: Implematic (Hydraulic power shift transmission) Optional Transmission Variant: Livedrive (indicating a specific variation of the Implematic system or a dual-clutch setup for PTO operation) Features Implematic System Function: A key feature of these tractors, providing variable speed control and hydraulic power management. 📐 Dimensions Exterior Wheelbase: Not specified in product info, but typical for tractors of this era. Weights Operating Weight: Not specified in product info, but generally around 3500-4500 lbs depending on configuration. 🛡️ Safety Features Ratings Safety Standards Adherence: Manual assists in maintaining safety through proper operation and repair of hydraulic systems, critical for tractor stability and control. 💡 Technology Features Infotainment Infotainment Systems: N/A (This is a tractor from the mid-20th century, no electronic infotainment systems). Driver Assistance Driver Assistance Features: N/A (Focus is on the hydraulic control system which acts as a form of implement assistance). Connectivity Connectivity Options: N/A 🔧 Maintenance Service Intervals Hydraulic Fluid Change: Specific intervals not provided, but regular checking and changing of hydraulic fluid is critical for Implematic system longevity. Typically recommended annually or after a set number of operating hours (e.g., 500-1000 hours). Fluid Specifications Hydraulic Fluid Type: The manual will specify the correct hydraulic oil type and viscosity (likely a premium tractor hydraulic fluid like UTF - Universal Tractor Transmission...