🏷️ 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 Features Parking Brake: Mechanical parking brake Passive Features Seatbelt: Seatbelts likely present if equipped with a factory cab 💡 Technology Features Infotainment Infotainment System: Basic instrumentation: Tachometer, engine temperature gauge, oil pressure gauge, fuel gauge, hour meter. No modern infotainment features. Driver Assistance Driver Assistance Features: None (typical for the era). Focus on mechanical controls and operator input. Connectivity Connectivity Options: None 🔧 Maintenance Service Intervals Engine Oil Change: Typically every 250-500 operating hours, or annually Fuel Filter Replacement: As recommended, typically every 250-500 hours or when issues arise Air Filter Service: Regular inspection and cleaning, replacement as needed based on operating conditions Fluid Specifications Engine Oil Grade: Typically SAE 15W-30 or 10W-30 (API CD or equivalent) Hydraulic Fluid Type: UTTO (Universal Tractor Transmission Oil) or specific David Brown hydraulic fluid Coolant Type: Ethylene glycol based antifreeze/coolant with corrosion inhibitors (e.g., 50/50 mix with distilled water) Known Issues Common Wear Points: Hydraulic pump wear, clutch wear, PTO clutch engagement, front axle kingpin wear, electrical wiring degradation Engine Reliability: Generally robust engines, but head gasket issues or injector problems can occur with...