Target Audience:
Owners, operators, and service technicians of David Brown 1490 tractors.
Value Proposition:
Provides comprehensive, manufacturer-originated repair and maintenance information, enabling cost savings on labor and facilitating in-house repairs.
Digital Advantage:
Instant download eliminates shipping costs and delivery delays, offering immediate access to critical service data.
Practicality:
Allows printing of specific sections, keeping the manual clean from oil and dirt during workshop use.
Engine Systems:
Engine overhaul, maintenance, troubleshooting, fuel system, cooling system, lubrication system, exhaust system, starting and charging system.
Transmission And Drivetrain:
Transmission overhaul, maintenance, troubleshooting, clutch, gearbox, differential, final drives, PTO.
Hydraulic Systems:
Hydraulic pump, control valves, cylinders, hydraulic system troubleshooting and repair, hydraulic fluid specifications.
Electrical Systems:
Wiring diagrams, starter motor, alternator, battery, lighting system, ignition system (if applicable), instrument panel.
Chassis And Steering:
Front axle, rear axle, steering system maintenance and repair, braking system.
Body And Cab:
Body panels, cab structure, operator controls, seating.
Maintenance Procedures:
Periodic maintenance charts, lubrication points, filter replacement, fluid level checks.
Repair Procedures:
Step-by-step repair instructions for all major components and systems.
Troubleshooting:
Diagnostic procedures and common fault identification for various systems.
Overhaul Procedures:
Detailed instructions for complete engine, transmission, and hydraulic system overhauls.
Diagnostic Capability:
Advanced diagnostics and troubleshooting, suitable for professional technicians.
Rebuild Capability:
Comprehensive rebuild procedures for all major mechanical assemblies.
User Level:
Professional technicians and advanced DIY mechanics.
Engine Manufacturer:
David Brown (likely manufactured in-house or to their specifications)
Engine Configuration:
Likely a 4-cylinder or 6-cylinder inline diesel engine (typical for this class and era of tractor).
Horsepower Rating:
Refer to specific model year for exact figures, typically in the 70-90 HP range for the 1490.
Torque Output:
Refer to specific model year for exact figures, essential for heavy draft work.
Injection System:
Direct Injection, likely with rotary or inline injection pump (e.g., Lucas CAV or Simms).
Cooling Medium:
Liquid Cooled
Oil Type:
Refer to manual for specific SAE viscosity grade and API classification (e.g., SAE 15W-30, API CD or higher).
Key Overhaul Areas:
Piston and ring replacement, cylinder liner honing or replacement, valve seat grinding, bearing replacement, crankshaft regrinding.
Transmission Type:
Likely a constant mesh gearbox with multiple forward and reverse gears. May feature a synchronized or unsynchronized design.
Transmission Options:
Possibility of a power shift or creeper gear option depending on specific configuration and market. PTO options also available.
Gear Selection:
Typically a main gear lever and a range selector (e.g., High/Low).
Transmission Fluid Type:
Refer to manual for specific GL rating (e.g., GL-4 or GL-5) and viscosity for gearbox and hydraulics (often shared or separate).
Overall Length:
Refer to specific tractor configuration and drawbar mounting.
Overall Width:
Varies with tire size and axle settings. Manual will detail standard configurations.
Operating Weight:
Typically in the range of 4,000-5,000 kg, depending on specification and ballast.
Wheelbase:
Refer to specific model configuration, crucial for stability and turning radius.
Rollover Protection:
ROPS (Roll-Over Protective Structure) may have been an option or standard depending on the year and market. Manual will advise on proper installation and maintenance.
Braking System:
Typically hydraulic disc brakes, rear axle mounted. Manual will detail adjustment and service procedures.
Operator Station:
Ergonomic considerations, control layout, and seat design as per the era's standards. Seat belt availability dependent on configuration.
Instrumentation:
Basic dashboard instrumentation including tachometer, engine temperature gauge, oil pressure gauge, fuel gauge, and warning lights.
Power Steering:
Likely equipped with hydrostatic power steering for ease of maneuverability, reducing operator fatigue.
Pto Engagement:
Mechanical or live PTO engagement, depending on tractor specification. Manual will detail operation and maintenance.
Engine Oil Change:
Typically every 250-500 operating hours, as specified in the manual.
Air Filter Service:
Inspect and clean at regular intervals, replace as needed, frequency dependent on operating conditions (dusty environments require more frequent checks).
Fuel Filter Replacement:
Scheduled replacement at intervals recommended in the manual, critical for engine longevity.
Engine Coolant Type:
Ethylene glycol-based antifreeze with corrosion inhibitors. Specific mix ratio (e.g., 50/50) and type will be detailed.
Hydraulic Fluid Capacity:
Refer to manual for exact capacity for hydraulic system, often shared with transmission.
Common Wear Points:
Clutch wear, hydraulic pump wear, PTO clutch engagement issues, potential for gearbox synchro wear (if synchronized).
Electrical Gremlins:
Older wiring harnesses can degrade, leading to intermittent electrical faults in lighting, instrumentation, or starter circuits. Thorough inspection and replacement of suspect wiring is key.
Cooling System Leaks:
Radiator, hoses, and water pump seals are common points for leaks. Regular inspection and prompt repair are essential to prevent overheating.
Manufacturer Origin:
David Brown Tractors was a British manufacturer, known for robust and reliable agricultural machinery.
Product Line:
The 1490 was part of David Brown's '90' series, succeeding earlier models and representing a step forward in power and features.
Production Period:
The 1490 was produced during the late 1970s and early 1980s. Specific year ranges are detailed within the manual or through external research.
Manufacturing Location:
United Kingdom
