🏷️ Basic Information Identification Make: David Brown Model: 1390 Vehicle Type: Tractor Codes Manual Product Name: David Brown 1390 Workshop Service Manual Repair 👋 Introduction Market Position Target Audience: Professional tractor technicians, agricultural workshops, and serious DIY tractor owners. Key Features Benefits: Cost savings on labor by performing repairs in-house, accurate and complete technical data, instant accessibility. Digital Advantage: Printable sections, no physical wear and tear from oil or dirt, immediate access. 📋 Manual Details Coverage Areas Manual Coverage Scope: Comprehensive repair, service, maintenance, diagnostics, and overhaul procedures for the David Brown 1390 tractor. Page Count Estimated Page Count: Hundreds of pages (specific number not provided, but described as extensive). Manual Type Type: Workshop Service Manual / Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, repair, troubleshooting, and maintenance (including fuel system, lubrication, cooling). Transmission: Repair, maintenance, and troubleshooting of the gearbox, clutch, and drivetrain components. Hydraulics: Details on the hydraulic system, pump, lift arms, control valves, and associated components for implement operation. Electrical: Wiring diagrams, troubleshooting electrical faults, starter, alternator, lighting, and instrumentation. Chassis And Frame: Information on frame integrity, steering system, front axle, and rear axle assemblies. Braking System: Service and repair procedures for the braking system. Cooling System: Radiator, fan, thermostat, and coolant circuit maintenance and repair. Fuel System: Fuel injection pump, injectors, filters, and tank maintenance and repair. Lubrication System: Oil pump, filter, and lubrication points for engine and drivetrain. Body And Cab: Procedures for body panels, cab components, and operator controls. Procedures Included Maintenance: Periodic maintenance charts, lubrication schedules, fluid checks, filter replacements. Repair: Step-by-step repair instructions for all major vehicle systems. Overhaul: Detailed overhaul procedures for major components such as the engine and transmission. Troubleshooting: Diagnostic information and troubleshooting guides for identifying and resolving common issues. Diagnostics: Guidance for diagnosing system malfunctions and performance issues. Wiring Diagrams: Inclusion of comprehensive electrical wiring diagrams for accurate diagnosis and repair. Technical Depth Depth: Suitable for professional technicians and detailed for competent DIY mechanics, covering routine to complex repairs and overhauls. 📊 Manual Specifications File Format Printability: Full Printable Zoom Functionality: Zoom IN/OUT enabled for detailed viewing Delivery Delivery Method: Instant Download Requirements Software Requirements: Adobe PDF Reader & WinRAR Operating System Compatibility: All Versions of Windows & Mac Binding Type Binding: Digital (PDF Download) Paper Type Paper Type Analogy: Digital replica of high-quality printed workshop manual pages. ⚙️ Engine Specifications Primary Engine Engine Family: David Brown AD4/55 (Likely, based on model year and typical David Brown engine configurations of the era). Performance Displacement: Approximately 3.3 Litres (Likely, standard for this tractor series). Horsepower: Around 58-62 PTO horsepower (typical for 1390 model). Fuel System Fuel Type: Diesel Injection System: Inline Fuel Injection Pump (e.g., CAV or Simms, depending on specific build). 🔧 Transmission Standard Gearbox Type: Constant Mesh Gearbox with 12 forward and 4 reverse gears (common configuration for 1390). Features Clutch: Dual-stage clutch (for PTO engagement and transmission). Rear Axle Type: Heavy-duty planetary reduction final drives. 📐 Dimensions Weights Operating Weight: Approximately 2500-2800 kg (Unladen). Tow Capacity: Significant towing capacity, detailed in manual. 🛡️ Safety Features Active Features Brakes: Hydraulically operated, enclosed wet disc brakes (a significant safety feature of the era). Passive Features Roll Over Protection: ROPS (Roll-Over Protective Structure) is typically available as an option or aftermarket fitment; manual likely covers installation and maintenance if equipped. 💡 Technology Features Infotainment Instrument Panel: Basic analog gauges for engine RPM, oil pressure, coolant temperature, fuel level, and warning lights. Manual details their function. Driver Assistance Pto Engagement: Independent PTO lever, with manual detailing operational procedures and safety interlocks. Hitch Control: Mechanical and/or hydraulic draft control for 3-point linkage, with operational guidance in manual. 🔧 Maintenance Service Intervals Engine Oil Change: Typically every 250 hours, but specific interval detailed in manual. Hydraulic Fluid Change: Typically every 1200-1500 hours, refer to manual for precise interval and fluid type. Fluid Specifications Engine Oil Type: API CD or CE rated, SAE 15W-30 or 10W-30 recommended (refer to manual for exact specification). Hydraulic Fluid Type: Typically an ISO VG 46 Hydraulic Oil or Universal Tractor Transmission Oil (UTTO) – manual will specify. Transmission Oil Type: UTTO (Universal Tractor Transmission Oil) or equivalent – manual will specify grade and capacity. Known Issues Common Wear Items: Potential wear on clutch plates, brake components, hydraulic pump seals, and lift arm pins/bushings. Manual provides diagnostic steps for these. Electrical Gremlins: Older wiring harnesses can be prone to degradation; wiring diagrams in the manual are crucial for troubleshooting. Cooling System Efficiency: Radiator core blockage or thermostat failure can impact cooling; manual guides inspection and replacement. 📚 Vehicle History Brand Heritage Manufacturer Origin: United Kingdom Model Evolution Production Period: Produced from the late 1970s into the 1980s. Production Manufacturing Plant: Likely Meltham, Yorkshire, UK (David Brown's primary...