Target User:
Farm mechanics, tractor owners, service technicians, agricultural workshops, and restoration enthusiasts working on David Brown tractors.
Original Market:
Medium to heavy-duty agricultural tractors, designed for a wide range of farming operations.
Manual Value Proposition:
Provides essential, manufacturer-authorized information for maintaining and repairing a wide range of David Brown Selectamatic tractors from a specific production era, crucial for preserving operational integrity and value.
Competitors Of Era:
Competed with tractors from manufacturers such as Massey Ferguson, Fordson, John Deere, International Harvester, and other British makes.
Unique Selling Points:
Covers the distinctive Selectamatic hydraulic system, extensive model year coverage (1970-1979), comprehensive repair procedures.
Model Variants Covered:
The manual aims to cover common David Brown Selectamatic tractor models produced within the 1970-1979 timeframe, such as the 770, 880, 990, 1200, 1400 series and their variants (e.g., Implematic, Comfortline).
Applicable Years:
1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979
Estimated Page Count:
Likely over 500 pages (typical for comprehensive tractor workshop manuals of this era, specific count not provided in product info but inferred)
Manual Type:
Complete Workshop Service Repair Manual
Major Systems:
Engine, Transmission (including Selectamatic system), Hydraulics, Steering, Brakes, Electrical System, Chassis, PTO, Rear Axle, Front Axle, Cooling System, Fuel System, Lubrication System
Braking System:
Mechanical drum brakes, parking brake system.
Electrical System:
Starting system (starter motor, battery), charging system (alternator/dynamo), lighting, ignition (if diesel glow plugs), instrumentation.
Chassis And Body:
Frame, front axle, rear axle, drawbar, fenders, operator controls, mounting points.
Pto And Hydraulics:
Power Take-Off (PTO) operation and maintenance, hydraulic pump, control valve, lift arms, linkage, hydraulic reservoir and filter.
Repair And Maintenance:
Detailed step-by-step repair instructions, routine maintenance procedures, troubleshooting guides, diagnostic information, overhaul procedures, component replacement, adjustments, specifications
Engine Overhaul:
Detailed steps for engine disassembly, inspection, repair, and reassembly, including piston and liner replacement, crankshaft, camshaft, valve train service.
Transmission Repair:
Complete overhaul of the gearbox, clutch, Selectamatic hydraulic unit, final drives, and differential.
Troubleshooting Guides:
Diagnostic procedures for common faults across all systems, symptom-based troubleshooting charts.
Steering System Repair:
Service and overhaul of the steering box, linkages, and potentially power steering components.
Depth:
Comprehensive: Covers everything from basic adjustments and fluid changes to full engine and transmission rebuilds, including specialized knowledge for the Selectamatic hydraulic system.
Diagnostic Tools:
Information on necessary special tools and basic diagnostic equipment for repairs.
Torque Specifications:
Precise torque values for all critical fasteners and engine/transmission components are essential for correct assembly.
PDF Quality:
Assumed high-resolution scans for clarity, searchable text is highly desirable for PDF manuals.
Searchability:
Typically, PDF downloads from reputable sources include OCR for text searching, greatly enhancing usability.
Printability:
PDF format allows users to print specific sections or the entire manual as needed.
Print Readability:
Designed for clear reproduction in print, though delivery is digital.
Image Clarity:
Diagrams, illustrations, and photographs are expected to be clear enough for accurate identification of parts and procedures.
Binding Type:
Not applicable (Digital PDF download)
Paper Type:
Not applicable (Digital PDF download)
Engine Family:
David Brown AD4/360 and DB 4-cylinder diesel engines (common in this era, specific models may vary within the Selectamatic range and years covered).
Engine Bore And Stroke:
Specific engine dimensions for the AD4/360 or other relevant DB engines will be provided in the manual.
Horsepower Range:
Varies by model, typically ranging from 40 to 70 HP for common tractors of this period (e.g., 880, 990, 1200 series Selectamatics).
Torque Figures:
Torque output would be model-specific, crucial for heavy draft work, detailed in the manual.
Injection System:
Likely Lucas or Simms inline fuel injection pumps.
Cooling System Type:
Pressurized coolant system with radiator, thermostat, water pump, and fan.
Transmission Type:
David Brown 'Selectamatic' hydraulic power transmission system with clutch and gearbox.
Optional Features:
Some models may have had variations in gearbox ratios or power take-off (PTO) configurations.
Selectamatic Operation:
Hydraulic draft control, position control, and often variable engine speed control through the Selectamatic lever system.
Gear Selection:
Manual gear selection typically combined with the Selectamatic hydraulic power control for implement operation.
Tractor Footprint:
Varies significantly by specific model (e.g., 880, 990, 1210, 1410 Selectamatic variants), but generally designed for agricultural use with standard track widths.
Wheelbase:
Varies by model, but critical for stability during field operations.
Operating Weight:
Typically in the 4,000 - 7,000 lbs (1800 - 3200 kg) range for tractors in this series, depending on configuration.
Safety Standards:
Manual will detail safety procedures relevant to tractor operation and maintenance of the era, likely adhering to British Standards for agricultural machinery safety.
Operator Aids:
Features relevant to safe operation would be detailed, such as PTO guards, brake pedal lock, and proper use of the Selectamatic system.
Operator Protection:
The manual will cover basic structural integrity and safety considerations for the operator's station of the era.
Routine Maintenance:
The manual will provide specific intervals for tasks such as oil changes, filter replacements, greasing, and checking fluid levels, typically in hours of operation or calendar periods.
Transmission Oil Change:
Specific mileage or hour intervals for transmission and hydraulic fluid changes, critical for the longevity of the Selectamatic system.
Engine Oil Type:
Likely SAE 30 or 15W-40 HD diesel engine oil, conforming to API CD or similar specifications of the era.
Hydraulic Fluid Type:
Specialized David Brown 'Hy-Trans' or equivalent UTTO (Universal Tractor Transmission Oil) suitable for the Selectamatic transmission and hydraulic system. Manual will specify exact type and viscosity.
Gearbox Oil Type:
Likely SAE 80W-90 or SAE 90 GL-4 gear oil for the main gearbox and differential.
Common Wear Points:
Potential wear in the Selectamatic hydraulic control valve, PTO clutch pack, and front axle kingpins. Overheating due to radiator blockages or cooling fan issues.
Hydraulic System Faults:
Leaking hydraulic cylinders, faulty pressure relief valves, worn control spools in the Selectamatic unit are common repair areas detailed in the manual.
Oil Filter Number:
Specific part numbers for engine oil filter, fuel filter, and hydraulic filter will be detailed in the manual (e.g., likely a Fram, CAV, or Wipac filter).
Manufacturer Origin:
David Brown Tractors Ltd., a British manufacturer with a long history of producing agricultural machinery, known for robust engineering.
Selectamatic Development:
The Selectamatic system was a significant advancement, offering integrated draft and position control for implements, and was a key feature across many David Brown models from the mid-1960s through the 1970s.
Key Innovations:
The Selectamatic system was a major selling point, integrating hydraulic controls for draft and position with live PTO capabilities on many models.
Manufacturing Location:
United Kingdom (primarily Huddersfield, Yorkshire)
