🏷️ Basic Information Identification Make: David Brown Model: 1390 Tractor Codes Product Name: David Brown 1390 Tractor Repair PDF Service Manual Download 👋 Introduction Market Position Manual Purpose: To provide detailed guidance for the repair and maintenance of the David Brown 1390 Tractor, enabling owners and technicians to perform work to factory standards. Key Features Manual Content Highlights: Step-by-step repair procedures, critical specifications, illustrations/pictures, maintenance schedules, disassembly and assembly instructions, cleaning and reinstallation procedures. Knowledge Transfer: Aims to impart factory-trained technician knowledge to the user. 📋 Manual Details Coverage Areas Vehicle Covered: David Brown 1390 Tractor Page Count Estimated Page Count: Extensive (Specific page count not provided, but implied to be comprehensive for a full service manual) Manual Type Manual Type: Service Manual / Repair Manual / Workshop Manual Language Language: English Format File Format: PDF Delivery Method: Instant Download Requirements Software Requirements: Adobe PDF Reader, WinZip Compatibility Operating System Compatibility: All Versions of Windows & Mac 📖 Manual Coverage Systems Covered Engine Systems: Engine overhaul, fuel system, lubrication system, cooling system, intake and exhaust systems, starting and charging systems Drivetrain Systems: Transmission, clutch, differential, rear axle, PTO (Power Take-Off) Hydraulic Systems: Hydraulic pump, control valve, cylinders, external hydraulic connections, three-point linkage Steering Systems: Power steering system, steering column, linkages Braking Systems: Brake systems (including parking brake), linkages, fluid specifications Electrical Systems: Wiring diagrams, lighting, starting motor, alternator, battery, instrument panel, troubleshooting Chassis And Body: Frame, front axle, fenders, operator station, weights and ballast Procedures Included General Maintenance: Scheduled maintenance, lubrication, fluid checks and changes, filter replacements Diagnostic Procedures: Troubleshooting guides, symptom-based diagnostics, diagnostic trouble codes (if applicable to the era) Repair Procedures: Step-by-step disassembly, cleaning, inspection, repair, and reassembly of all major components and systems Adjustment Procedures: Adjustment of clutch, brakes, valves, linkages, and hydraulic systems Special Tools: Identification and usage of specialized tools required for specific repairs Technical Depth Depth Of Coverage: Comprehensive (from basic maintenance to complete engine/transmission rebuilds) Target Audience Intended User: Professional technicians and DIY mechanics with basic mechanical and electrical knowledge 📊 Manual Specifications File Format Print Quality: Full Printable Zoom Functionality: YES Binding Type Digital Binding Equivalent: PDF Navigation (Hyperlinks, bookmarks if present) Paper Type Digital Paper Type Equivalent: Digital document rendering ⚙️ Engine Specifications Primary Engine Engine Model: Likely a David Brown AD4/40 or similar 4-cylinder diesel engine (specific engine code not provided in product info, but typical for this model range) Performance Displacement: Approximately 3.8 - 4.0 Liters (typical for David Brown 4-cylinder diesel engines of this era) Horsepower Rating: Estimated 70-80 PTO horsepower (actual figures vary based on specific configuration and testing) Fuel System Fuel Type: Diesel Injection System: Likely a mechanical injection pump system (e.g., Lucas CAV or similar) Cooling System Cooling Type: Water-cooled 🔧 Transmission Standard Transmission Type: Likely a 12-speed constant mesh gearbox (e.g., 8 forward, 4 reverse or similar configuration) Optional Optional Gearbox Features: Possible presence of a high-low range splitter or creeper gears depending on specific market configuration. Features Clutch Type: Likely a dual-stage clutch for transmission and PTO engagement. 📐 Dimensions Exterior Overall Length: Not specified, but typical for a tractor of its class (e.g., 12-14 feet) Weights Operating Weight: Not specified, but likely in the 6,000 - 7,500 lbs range depending on configuration. 🛡️ Safety Features Ratings Rollover Protection: ROPS (Roll-Over Protective Structure) may be optional or standard depending on the model year and market. Manual will cover its installation and maintenance if applicable. 💡 Technology Features Infotainment Infotainment Features: Basic operator controls and instrumentation. No modern infotainment systems typical of passenger vehicles. Driver Assistance Driver Assistance Features: Primarily mechanical controls. Power steering would be considered a significant assistance feature of this era. 🔧 Maintenance Service Intervals Engine Oil Change Interval: Typically 250 hours, but the manual will provide exact intervals. Hydraulic Oil Change Interval: Typically 500-1000 hours, manual will confirm. Fluid Specifications Engine Oil Type: API CD or equivalent, SAE 15W-30 or 10W-30 depending on climate. Manual will list exact specifications. Hydraulic Fluid Type: Likely a universal tractor transmission oil (UTTO) or hydraulic fluid meeting specific David Brown/Tenneco specifications. Manual will provide exact part numbers/grades. Coolant Type: Ethylene glycol based antifreeze with corrosion inhibitors. Manual will specify mixture ratio and type. Known Issues Common Wear Items: Clutch wear, hydraulic pump performance degradation, PTO clutch engagement issues, potential for front axle wear, electrical harness degradation over time. Diagnostic Focus Areas: Manual will guide users through diagnosing and addressing common issues like hard starting, power loss, hydraulic system leaks, and transmission engagement problems. 📚 Vehicle History Brand Heritage David Brown Legacy: David Brown was a renowned British tractor manufacturer, known for robust and reliable agricultural machinery, later becoming part of the Tenneco International (Case IH) family. Model Evolution 1390 Context: The 1390 was a significant model in David Brown's later years, representing a modern...