🏷️ Basic Information Identification Make: David Brown Model: 990 Tractor 👋 Introduction Market Position Market Position: The David Brown 990 Tractor was a popular and robust agricultural machine known for its reliability and versatility in its era. This manual serves as an essential resource for owners and technicians maintaining these tractors. Competitive Analysis Competitive Analysis: Competed with other established tractor manufacturers of its time, offering a blend of power, efficiency, and durability. The availability of comprehensive service documentation is crucial for extending its operational life. Key Features Key Features: Provides detailed, step-by-step repair procedures, exploded diagrams, service data, and technical specifications essential for effective maintenance and repair. Emphasizes the use of genuine parts and correct service tools. Ease Of Use: Prepared with simple explanations, making it accessible for relatively new personnel to perform satisfactory service. Instant Download Benefit: Offers immediate access upon payment, eliminating shipping costs and delays. 📋 Manual Details Coverage Areas Coverage Areas: David Brown 990 Tractor - Comprehensive repair, adjustment, maintenance, removal, installation, disassembly, and assembly of all vehicle components and systems. Page Count Page Count: Not specified, but described as comprehensive and detailed with pictorial diagrams from bumper to bumper. Manual Type Manual Type: Technical Service Manual / Parts Service Manual / Repair Manual Language Language: English Format Format: PDF (Instant Download) 📖 Manual Coverage Systems Covered Systems Covered: Engine, transmission, drivetrain, hydraulic system, steering, braking system, electrical system, cooling system, fuel system, chassis, bodywork, operator controls, and all associated components. Hydraulic System: Comprehensive coverage of the hydraulic pump, control valves, lift arms, cylinder, and all associated hoses and fittings for both general-purpose and Selectamatic systems. Procedures Included Procedures Included: Maintenance, adjustments, service, removal, installation, disassembly, assembly, troubleshooting, diagnosis, testing, checking, lubrication, and repair operations. Includes special notes, important points, service data, precautions, wear limits, and factory specifications. Adjustment Operations: Detailed instructions for adjusting clutch, brakes, steering linkage, hydraulic system pressure, and engine settings, including reference to specific adjustment values and wear limits. Removal Installation Procedures: Comprehensive, step-by-step guides for removing and installing all major components and assemblies, including engine, transmission, axles, hydraulics, and steering. Disassembly Assembly Procedures: Detailed breakdown and reassembly instructions for individual components and sub-assemblies, supported by exploded diagrams to clarify part relationships. Tightening Torques: Provides critical torque specifications for fasteners on various components, essential for ensuring proper assembly and preventing damage. Technical Depth Technical Depth: Comprehensive and detailed, suitable for both professional mechanics and DIY enthusiasts. Covers basic maintenance to advanced troubleshooting and rebuild procedures, with step-by-step explanations and pictorial diagrams. Pictorial Diagrams: Features 'bumper to bumper' pictorial diagrams, exploded views, detailed illustrations, drawings, and photos to guide users through every service repair procedure. Service Tool References: Includes reference to specific special service tool numbers required for certain operations, with accompanying illustrations showing their usage. Troubleshooting Guides: Provides diagnosis, testing, and troubleshooting information to identify and resolve issues with various systems and components. Specifications Lists: Includes service data, specifications lists, tightening torques, checking and adjusting values, and allowable limits for critical parameters. Factory Specifications: Contains factory specifications, allowable limits, and diagnostic data for accurate repairs and adjustments, ensuring adherence to original design parameters. 📊 Manual Specifications File Format File Format: PDF Compatibility: Compatible with Windows, Mac, and Linux operating systems. Requirement: Requires Adobe Reader for viewing. Print Quality Print Quality: Printable on all pages, allowing for high-quality document reproduction. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Primary Engine: Likely a diesel engine. Specifics such as cylinder count, displacement, bore, stroke, compression ratio, and power output are detailed within the manual. Engine Type: Likely a 3 or 4-cylinder diesel engine. Manual details cylinder head removal/installation, piston/ring replacement, and crankshaft bearing services. Performance Performance: The manual details specifications for engine performance, including horsepower, torque curves, and operating parameters for optimal function. This would be model-specific, but the manual covers these aspects. Fuel Efficiency: While direct MPG figures are not typical for tractors, the manual provides data to ensure the engine operates at peak efficiency, impacting fuel consumption. Fuel System Fuel System: Covers the diesel fuel injection system, including pumps, injectors, fuel filters, and associated lines, with procedures for testing, adjustment, and replacement. Injector Testing: Procedures for testing fuel injectors for spray pattern, pressure, and timing, crucial for optimal engine performance and fuel economy. 🔧 Transmission Standard Standard: Likely a manual transmission, possibly with a multi-speed gearbox and a clutch system. The manual details the removal, overhaul, and installation of the transmission components. Optional Optional: The manual would cover any optional transmission configurations or power take-off (PTO) units if applicable to the 990 model. Features Features: Details on gear selection, clutch operation, differential lock (if equipped), and final drive mechanisms. Includes lubrication requirements and service intervals for the transmission and drivetrain. Pto Operation:...