The David Brown 1390 is a heavy-duty agricultural tractor representing a robust era of British engineering, known for its sturdy construction and reliable performance. Produced from the late 1970s to the early 1980s, this model was designed for a wide range of agricultural tasks, including plowing, cultivation, harvesting, and transport. It competed with other tractors of similar horsepower classes from major manufacturers of its time. The 1390 is powered by a likely David Brown inline diesel engine, offering approximately 60-75 HP at the drawbar and 70-85 HP at the PTO, and features a manual transmission with multiple forward and reverse speeds. This Factory Service Repair Manual (FSM) provides comprehensive, factory-level repair and diagnostic information for the David Brown 1390. It covers all major systems, including engine, drivetrain, hydraulics, electrical, chassis, and braking systems, along with detailed procedures for maintenance, troubleshooting, disassembly, assembly, and repair. The manual also includes critical technical specifications and tolerances necessary for accurate adjustments. Its scope is intended to assist owners, mechanics, and technicians in effectively maintaining and repairing the vehicle, ensuring its continued operational efficiency and longevity. 🏷️ Basic Information Identification Make: David Brown Model: 1390 Vehicle Type: Agricultural Tractor Codes Product Code: DB-1390-FSM 👋 Introduction Market Position Category: Heavy-duty agricultural tractor Competitive Analysis Competitors Era: Competed against tractors from manufacturers like Massey Ferguson, John Deere, Ford, and International Harvester of similar horsepower classes Key Features David Brown Heritage: Represents a robust era of British agricultural engineering, known for sturdy construction and reliable performance Model Purpose: Designed for a wide range of agricultural tasks, including plowing, cultivation, harvesting, and transport 📋 Manual Details Coverage Areas Primary Coverage: Factory Service Repair Page Count Estimated Page Count: Comprehensive (typical for model series, estimated 500+ pages) Manual Type Type: Factory Service Repair Manual (FSM) / Workshop Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanical, fuel system, lubrication system, cooling system, exhaust system, starting and charging systems Drivetrain Systems: Transmission (gearbox, PTO), rear axle, differential, final drives, drive shafts, clutch Hydraulic Systems: Hydraulic pump, control valves, lift arms, remote hydraulics, hydraulic fluid specifications and maintenance Electrical Systems: Wiring diagrams, lighting, ignition system (if applicable to era), starting and charging, accessory circuits Chassis And Steering: Front axle, steering system (mechanical and/or power steering), suspension components Braking Systems: Brake operation, maintenance, and repair of braking components Body And Cab: Body panels, cab components, controls, seating, instrument panel Power Steering System: Service and repair of power steering components, hydraulic pump, cylinder, and steering linkage. Three Point Hitch: Adjustment, maintenance, and repair of the hydraulic 3-point hitch system, including draft control. Procedures Included Maintenance: Routine maintenance schedules, lubrication points, filter replacements, fluid checks and changes Troubleshooting: Diagnostic charts and procedures for identifying and resolving common and uncommon issues Repair: Step-by-step repair instructions for all major mechanical, hydraulic, and electrical components Disassembly And Assembly: Detailed procedures for component removal, disassembly, inspection, and reassembly Specifications And Tolerances: Torque specifications, clearances, pressures, and other critical technical data for proper repair and adjustment Diagnostic Procedures: Detailed troubleshooting guides for identifying symptoms and root causes of malfunctions Technical Depth Depth: Comprehensive factory-level repair and diagnostic information, suitable for skilled technicians and serious DIY users Diagnostic Tools: Procedures may involve basic diagnostic tools, pressure gauges, and electrical testers. 📊 Manual Specifications File Format Compatibility: Compatible with all Windows and Mac operating systems Required Software: Adobe PDF Reader, WinZip (for potential extraction) Print Quality Printability: Printable pages, allowing for hard copy reference Binding Type Binding: Digital (PDF format - not physically bound) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Manufacturer: David Brown (typically British Leyland subsidiary) Engine Model: Likely a variant of the David Brown inline diesel engine Engine Type: Diesel, naturally aspirated (potentially turbocharged variants existed for similar models) Displacement: Estimated 3.5 - 4.5 Liters (typical for this class and era of David Brown tractors) Performance Horsepower Drawbar: Approximately 60-75 HP (estimated for this model class) Horsepower Pto: Approximately 70-85 HP (estimated for this model class) Fuel System Injection Type: Direct injection (typical for David Brown diesel engines of this era) Fuel Type: Diesel 🔧 Transmission Standard Transmission Type: Manual transmission with a synchronized gearbox Optional Optional Gearbox: Likely offered with different gear configurations or a creeper gear option Features Gear Count: Typically 8 or 12 forward speeds and 2 or 4 reverse speeds Power Take Off Pto: Standard PTO (e.g., 540 RPM, potentially 1000 RPM options) 📐 Dimensions Exterior Length: Variable, but typically around 3.5-4.0 meters (excluding implements) Width: Variable, typically 1.8-2.2 meters Height: Variable, typically 2.4-2.7 meters (to top of cab/exhaust) Weights Operating Weight: Approximately 3500-4500 kg (estimated) 🛡️ Safety Features Ratings Roll Over Protection: May have ROPS (Roll-Over Protective Structure) if fitted with a later cab; older configurations might lack integrated ROPS Active...