Target Audience:
Professional technicians, agricultural mechanics, and experienced DIY tractor owners.
Target User Skill Level:
Suitable for those with basic mechanical and electrical understanding, while offering the depth required by seasoned professionals.
Manual Features:
Step-by-step repair procedures, critical specifications, detailed illustrations/pictures, maintenance schedules, disassembly, assembly, cleaning, and reinstallation guidance.
Benefit To Owner:
Empowers owners to make informed decisions regarding maintenance and repair, mirroring factory-trained technician knowledge.
Learning Curve:
Assumes basic knowledge of electrical and mechanical concepts; advises caution for users without such foundation.
Manual Advantage:
Provides factory-level data that may be difficult to source through other means, offering a significant advantage for repair accuracy and efficiency.
Engine:
Complete engine overhaul, disassembly, assembly, inspection, and tuning procedures for the David Brown AD4.240 diesel engine.
Transmission:
Detailed procedures for the 8-speed synchromesh gearbox, including clutch, gearbox, and final drive assemblies.
Hydraulics:
Service and repair of the David Brown Selectamatic hydraulic system, including pump, valves, cylinders, and linkages.
Electrical:
Wiring diagrams, troubleshooting for starting and charging systems, lighting, and auxiliary electrical components.
Fuel System:
Information on the diesel fuel injection system, including pump and injector testing and calibration.
Cooling System:
Service and maintenance of the radiator, water pump, and thermostat.
Steering:
Repair and adjustment procedures for the steering mechanism.
Brakes:
Maintenance and repair of the hydraulic braking system, including master cylinder, wheel cylinders, and brake lines.
Chassis And Frame:
Inspection and repair of the tractor chassis and mounting points.
Bodywork:
Information on the hood, fenders, and operator station.
Power Take Off Pto:
Maintenance, repair, and adjustment of the independent PTO system.
Front Axle And Steering:
Detailed procedures for front axle assembly, kingpins, tie rods, and steering column repairs.
General Maintenance:
Scheduled maintenance tasks, lubrication points, and fluid level checks.
Disassembly And Assembly:
Step-by-step instructions for dismantling and reassembling all major components and sub-assemblies.
Troubleshooting:
Diagnostic charts and procedures for identifying and resolving common and uncommon operational faults.
Cleaning And Inspection:
Detailed guidance on cleaning parts before inspection and the critical inspection points for wear and damage.
Adjustments:
Procedures for adjusting critical systems such as clutch, brakes, and hydraulic linkages.
Rebuilds:
Comprehensive instructions for rebuilding major components like the engine, transmission, and hydraulic pump.
Technical Specifications Inclusion:
Critical specifications such as torque values, clearances, fluid capacities, and engine tuning parameters are included.
Troubleshooting Methodology:
Systematic approach to fault finding, covering electrical, hydraulic, and mechanical issues.
Depth Of Coverage:
Factory-level detail, suitable for professional technicians and experienced DIY mechanics.
Diagnostic Capabilities:
Provides guidance for diagnosing issues through symptoms and systematic troubleshooting steps.
Print Quality:
Full Printable - High resolution for clear reproduction of text and diagrams.
Zoom Capability:
Yes - Allows for detailed examination of diagrams and text.
Searchability:
PDF format allows for text searching of keywords and phrases, enhancing efficiency.
Digital Convenience:
Instant download provides immediate access to repair information, reducing downtime.
Software Requirements:
Adobe PDF Reader, WinZip (or equivalent decompression software).
Operating Systems:
Compatible with all versions of Windows and macOS.
Delivery Method:
Instant Download
Engine Model:
David Brown AD4.240
Engine Type:
4-cylinder, naturally aspirated, direct injection, diesel engine.
Bore And Stroke:
3.74 inches x 4.53 inches (95 mm x 115 mm) - specific dimensions are detailed in the manual.
Rated Horsepower:
Approx. 74 PTO HP (55 kW)
Displacement:
240.3 cubic inches (3.94 liters)
Torque Peak:
Specific torque figures are detailed within the manual for engine tuning and rebuilds.
Injection Pump:
Likely Lucas or CAV injection pump (specific model covered in manual).
Cooling Method:
Liquid-cooled
Transmission Type:
David Brown 8-speed Synchromesh (often referred to as 12-speed with 4-speed splitter, but core gearbox is 8-speed).
Gear Configuration:
Range selector and gear selector for 8 forward and 2 reverse gears.
Gear Selection Mechanism:
Lever operated for range and speed selection.
Clutch Type:
Dual-clutch for independent PTO operation.
Pto Type:
Independent PTO, 540 RPM standard, 1000 RPM optional (dual-clutch allows engagement without clutch pedal depression).
Engine Oil Change:
Typically every 250 hours or annually (refer to manual for exact specifications).
Air Filter Service:
Regular inspection, clean or replace as needed based on operating conditions.
Fuel Filter Replacement:
Typically annually or every 500 hours.
Engine Oil Type:
API CD or CE rated SAE 15W-40 diesel engine oil (verify specific viscosity based on climate).
Transmission Hydraulic Fluid:
David Brown Hy-Trans or equivalent UTF (Universal Tractor Transmission Fluid) – consult manual for exact specification and capacity.
Coolant:
Mixture of antifreeze and water (typically 50/50) for freeze protection and corrosion inhibition.
Engine Oil Capacity:
Approx. 12.5 US quarts (11.8 liters) - manual provides exact capacity.
Hydraulic System Capacity:
Approx. 8.5 US gallons (32 liters) - manual provides exact capacity.
Common Wear Points:
Wear in the Selectamatic hydraulic control unit, clutch wear, and potential for injector pump issues if fuel maintenance is neglected.
Typical Repairs:
Routine servicing, hydraulic system adjustments, clutch replacements, and engine component overhauls.
Electrical Component Reliability:
While robust, the manual addresses common electrical checks and potential points of failure for aged components.
