The David Brown 1390 is a robust tractor model, produced likely in the late 1970s and early 1980s, representing a significant advancement in David Brown's line of agricultural machinery. Known for their reliability and workhorse capabilities, these British-manufactured tractors are engineered for demanding agricultural tasks. The 1390 typically features a diesel engine, often a Perkins, with approximately 70-80 PTO horsepower, delivering substantial low-end torque essential for fieldwork. Its design emphasizes mechanical functionality and durability, making it a dependable choice for owners and operators. This comprehensive Workshop Manual (WSM) / Service Repair Manual provides in-depth guidance for the David Brown 1390 tractor. It covers all aspects of service and repair, including routine maintenance, detailed troubleshooting, and essential technical specifications. The manual is designed to assist tractor owners, mechanics, and agricultural workshops in maintaining the optimal performance and longevity of their 1390. With step-by-step instructions, diagrams, and wiring schematics, this English-language manual enables efficient diagnostics and repairs, empowering users to undertake servicing and save on professional costs. 🏷️ Basic Information Identification Make: David Brown Model: 1390 Type: Tractor Product Name: David Brown 1390 WSM Service Manual Repair 👋 Introduction Market Position Target User: Tractor owners, mechanics, agricultural workshops Competitive Analysis Value Proposition: Enables self-repair, saving significant costs on professional servicing Key Features Ease Of Use: Easy-to-follow step-by-step instructions, pictures, and diagrams Comprehensiveness: Covers all services, repairs, and routine maintenance Accessibility: Digital format with printable pages for workshop use 📋 Manual Details Coverage Areas Primary Coverage: Service and Repair Secondary Coverage: Routine Maintenance, Troubleshooting, Wiring Diagrams Page Count Estimated Page Count: Likely extensive, typical for comprehensive service manuals (exact count not provided in product info) Manual Type Type: Workshop Manual (WSM) / Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine: Detailed repair, overhaul, and troubleshooting of the engine Fuel System: Carburetor/injection system, fuel pump, filters, lines Cooling System: Radiator, water pump, thermostat, hoses, fan Lubrication System: Oil pump, oil filter, oil passages, lubrication points Transmission: Gearbox overhaul, clutch, PTO, differential, final drives Hydraulics: Hydraulic pump, valves, cylinders, linkages, hitch system Electrical System: Starting system, charging system, lighting, ignition (if applicable), wiring diagrams Steering: Power steering system, steering linkages, wheels Brakes: Brake system components, adjustments, and repair Axles: Front and rear axle assemblies, hubs, bearings Bodywork: Fenders, hood, operator station, sheet metal repair Procedures Included Maintenance: Scheduled maintenance, lubrication, filter replacement Diagnostics: Troubleshooting guides for common and uncommon problems Repair: Step-by-step repair procedures for all major components Overhaul: Complete engine, transmission, and hydraulic system overhauls Adjustment: Component adjustments (e.g., valve clearances, brake pedal) Installation: Procedures for replacing major components and accessories Technical Depth Depth: In-depth, professional quality with step-by-step instructions, pictures, and wiring diagrams 📊 Manual Specifications File Format File Format: PDF Print Quality Printability: Full Printable Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Requirements Software Requirement: Adobe PDF Reader Compatibility Operating Systems: All Versions of Windows & Mac Delivery Method Delivery: Instant Download ⚙️ Engine Specifications Primary Engine Engine Type: Diesel Engine Family: Perkins (common for this era of David Brown) Cylinders: Typically 4 or 6 cylinders for this model range Displacement: Likely in the range of 3.5 - 4.5 liters, depending on specific variant (e.g., 3.5L for 1390) Performance Horsepower: Approximately 70-80 PTO HP (exact figures vary by specific engine tune and year) Torque: Significant low-end torque, characteristic of diesel engines of this era Fuel System Injection System: Typically Lucas CAV or similar mechanical injection pumps Fuel Type: Diesel Fuel 🔧 Transmission Standard Transmission Type: David Brown Split-Torque Transmission (DHT) or similar manual gearbox Gears: Multiple forward and reverse gears, often with a synchronized mainbox and a high/low range splitter or powershift Optional Optional Features: Variations in PTO speeds, potentially creeper gears Features Pto: Standard 540/1000 RPM PTO, likely with independent engagement 📐 Dimensions Exterior Wheelbase: Typical for a tractor of this class, approximately 80-90 inches (specific value needed from manual) Weights Operating Weight: Approx. 6,000-7,000 lbs (unladen, varies with configuration) Max Allowable Weight: Significantly higher with ballast and implements 🛡️ Safety Features Ratings Safety Features: ROPS (Roll-Over Protective Structure) likely standard or optional depending on year and market, seatbelts Active Features Braking System: Drum or disc brakes (rear), independent braking, park brake Passive Features Operator Station: Designed for operator safety and visibility 💡 Technology Features Infotainment Operator Interface: Basic mechanical controls, gauges for oil pressure, water temperature, fuel level, ammeter. Driver Assistance Assistance Features: None beyond standard operational controls; emphasis on mechanical functionality. Connectivity Connectivity Options: N/A (Pre-digital era tractor) 🔧 Maintenance Service Intervals Engine Oil Change: Typically 100-250 hours, depending on operating conditions and oil type (refer to manual for specifics) Air Filter Check: Check daily or weekly; replace as needed Fuel Filter Replacement: Typically 250-500 hours or annually Fluid Specifications Engine Oil Type: API CD/CE...