The David Brown 1390 is a robust agricultural tractor, produced likely in the late 1970s to early 1980s, representing a lineage of dependable British engineering. Known for their strong engines and solid construction, David Brown tractors of this era were designed for demanding farm work. The 1390, estimated to have a diesel engine displacement of around 3.5 to 4.0 liters and producing approximately 70-80 PTO horsepower, embodies this heritage. Its manual transmission, likely featuring multiple forward and reverse gears, coupled with a substantial operating weight, makes it a capable machine for a variety of agricultural tasks. This comprehensive factory service repair manual provides detailed information for the David Brown 1390. It covers essential areas including general information, technical specifications, engine, cooling system, fuel system, power train, clutch, transmission, front and rear axles, brakes, electrical system, and hydraulic system. The manual offers complete disassembly and reassembly instructions, standard maintenance procedures, and troubleshooting guidance, all presented with step-by-step instructions and hundreds of photos and illustrations. This resource is designed to assist both do-it-yourself owners and experienced mechanics in maintaining and repairing the vehicle effectively. 🏷️ Basic Information Identification Make: David Brown Model: 1390 Product Type: Service Repair Manual Product Format: PDF Download 👋 Introduction Market Position Target Audience: Do-it-yourself owners and experienced mechanics Competitive Analysis Advantage Over Print: More convenient, less expensive, printable selectively Key Features Completeness: Complete official full factory service repair manual Accessibility: Downloadable, accessible on multiple devices Cost Effectiveness: Inexpensive way to keep vehicle working properly, saves on mechanic costs Durability: Digital format avoids wear and tear of paper manuals 📋 Manual Details Coverage Areas General Information: True Specifications: True Engine: True Cooling System: True Fuel System: True Power Train: True Front Axle: True Clutch: True Differential Lock: True Electrical System: True Brakes: True Fenders Fuel Tank Platform: True Final Drive: True Front System: True Front Wheel Drive: True Hydraulic System: True Main Drive Bevel Gears Differential: True Park Brake: True Power Steering System: True Power Take Off: True Rear Axle: True Steering Gear: True Transmission: True Page Count Estimated Pages: Hundreds Manual Type Type: Factory Service Repair Workshop Manual Language Language: English Format File Format: PDF Compatibility: Windows, Mac, Smartphones, Tablets (via browser) Printability: Yes (all pages) Software Requirements PDF Reader: Adobe PDF Reader (Free) Compression Utility: Winzip (Free) 📖 Manual Coverage Systems Covered Powertrain Systems: Engine, Cooling System, Fuel System, Clutch, Transmission, Power Take-Off, Final Drive, Rear Axle, Front Axle, Front-Wheel Drive Chassis And Body Systems: Brakes, Steering Gear, Power Steering System, Fenders, Fuel Tank & Platform, Front System Electrical And Hydraulic Systems: Electrical System, Hydraulic System Procedures Included Repair Procedures: Complete disassembly and reassembly instructions Maintenance Procedures: Standard maintenance, routine checks, lubrication Troubleshooting: Implied through detailed explanations and diagnostics Technical Depth Depth Level: Comprehensive factory-level detail, suitable for DIY and experienced mechanics Illustrations: Hundreds of photos and illustrations Documentation Style: Step-by-step instructions 📊 Manual Specifications File Format Digital Format: PDF Print Quality Print Feature: Printable pages Binding Type Binding: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Diesel (details vary based on specific 1390 sub-model, likely British Leyland/Perkins origin) Performance Displacement: Typically around 3.5 - 4.0 Liters (common for David Brown tractors of this era, e.g., 3.5L 4-cylinder or 4.0L 4-cylinder Perkins variants) Horsepower Range: Approx. 70-80 PTO horsepower (estimated for the 1390 model) Torque: Details not provided, but would be robust for agricultural applications Fuel System Fuel Type: Diesel Injection System: Direct Injection (typical for diesel engines of this period) 🔧 Transmission Standard Transmission Type: Manual (likely David Brown's own gearbox, possibly with synchromesh) Features Gear Options: Multiple forward and reverse gears (specific count varies, but commonly 12 forward x 4 reverse or similar options with a high/low range) 📐 Dimensions Weights Operating Weight: Approx. 3500-4000 kg (estimated for tractor only, without ballast) 💡 Technology Features Infotainment Features: Basic operator controls, analog gauges (no modern infotainment) 🔧 Maintenance Service Intervals Engine Oil Change: Refer to manual for specific interval (typically 250-500 hours for diesel) Hydraulic Oil Change: Refer to manual for specific interval (typically annual or 500-1000 hours) Fluid Specifications Engine Oil: Refer to manual (likely API CD or CE grade, SAE 15W-40 or 20W-50) Hydraulic Transmission Oil: Refer to manual (likely UTF - Universal Tractor Transmission Fluid or specific David Brown approved oil, e.g., Case/IH Hy-Tran) Coolant: Refer to manual (typically ethylene glycol based antifreeze mixture) Known Issues Common Wear Points: Clutch wear, hydraulic pump efficiency, seal leaks, PTO clutch wear Electrical Concerns: Wiring harness degradation, starter motor issues (common in older machinery) 📚 Vehicle History Brand Heritage Manufacturer: David Brown Tractors Ltd., UK (later part of Tenneco International/Case IH) Model Evolution Production Period: Likely late 1970s to early 1980s Production Manufacturing Location: Meltham, Yorkshire, UK (primary) 🏆 Awards & Recognition Recognitions Industry Standing: David...