Target Audience:
Owners, operators, mechanics, technicians, restoration enthusiasts
Value Proposition:
Comprehensive coverage for multiple popular David Brown tractor models at a competitive price, with perpetual digital access.
Unlimited Access:
Lifetime access without renewal fees
Multi Device Compatibility:
Usable on unlimited computers, tablets, and smartphones (Windows & MAC compatible)
Content Completeness:
Full factory service and repair workshop manual, no limitations or trial versions.
Primary Coverage:
Service, Repair, Troubleshooting
Diagnostic Coverage:
Comprehensive diagnostic procedures for all systems
Estimated Pages:
Hundreds (as described, exact count not provided)
Type:
Factory Service & Repair Workshop Manual
Accessibility:
Downloadable to computer, tablet, smartphone
Engine Systems:
Engine overhaul, fuel system, lubrication, cooling, ignition (diesel models may have glow plugs or compression ignition specifics), exhaust
Transmission Systems:
Gearbox overhaul, clutch service, PTO (Power Take-Off) operation and repair, differential, final drives
Hydraulic Systems:
Hydraulic pump service, control valve repair, linkage adjustments, hydraulic cylinder overhaul, implement attachment hydraulics
Electrical Systems:
Wiring diagrams, starter motor, generator/alternator, lighting system, battery service, instrumentation
Chassis And Running Gear:
Front axle repair, steering system overhaul, brake system service (mechanical and hydraulic), wheel and tire service, chassis lubrication
Body And Operator Station:
Fender repair, seat adjustment, control lever service, platform maintenance
Maintenance Procedures:
Scheduled maintenance, lubrication points, fluid changes, filter replacement, pre-operation checks
Repair Procedures:
Engine rebuilding, transmission overhaul, hydraulic system repairs, brake system refurbishment, electrical component replacement
Troubleshooting Guides:
Systematic fault diagnosis, common problems and solutions, symptom-based troubleshooting
Technical Specifications:
Torque specifications, clearances, timing settings, fluid capacities, pressures
Depth:
Comprehensive, suitable for professional mechanics and serious DIY users
Diagrams And Illustrations:
Hundreds of detailed photos and exploded diagrams
Searchability:
Likely text-searchable PDF (standard for professional manuals)
Printability:
Printable (single pages or entire manual)
Binding:
Not Applicable (Digital Download)
Paper Type:
Not Applicable (Digital Download)
Usage Rights:
Unlimited usage on multiple devices, lifetime access, no expiry
Engine Type:
Diesel (typically indirect injection or direct injection depending on model and era)
Engine Manufacturer:
David Brown (often Perkins or other contract engines used in specific models)
Power Output:
Varies by model; e.g., 770/780 typically 45-55 HP, 1200/4600 higher ranges (exact figures require specific model data)
Torque Curve:
Detailed in manual for specific engines, providing optimal operating RPMs
Fuel Delivery:
Injection pump (e.g., CAV, Bosch) and injectors. Manual covers pump timing and injector testing/replacement.
Cooling System:
Water-cooled, radiator, thermostat, water pump. Manual covers coolant flush, pump replacement, radiator repair.
Lubrication System:
Oil pump, oil filter, sump. Manual covers oil change intervals, viscosity specifications, and filter part numbers.
Transmission Type:
Manual gearbox with multi-speed options (e.g., 8-speed, 12-speed, depending on model)
Gear Selection:
High-low range selector, main gear lever
Differential Lock:
Often available as an option or standard on certain models, typically foot-pedal operated.
Pto:
Independent PTO, often 540 RPM, with manual engagement. Manual covers PTO clutch and engagement mechanism.
Hydraulic Lift:
David Brown Vari-O-Matic or Trailing Linkage (TL) hydraulic system. Manual details pump, control valve, and cylinder operation/repair.
Wheelbase:
Varies by model, typically around 75-85 inches (1900-2150 mm)
Operating Weight:
Varies by model, roughly 4000-6000 lbs (1800-2700 kg)
Towing Capacity:
Significant towing capacity, detailed by model in the manual
Rollover Protection:
ROPS (Roll Over Protection Structure) might be an optional aftermarket or later addition. Manual may cover mounting and inspection of such structures if factory-fitted.
Brakes:
Independent rear drum brakes, sometimes with master cylinder for front assist on later models. Manual details adjustment and service.
Operator Station:
Basic platform, operator presence switch for PTO/transmission may be present on later models.
Instrumentation:
Basic analog gauges: tachometer, engine temperature, oil pressure, fuel level, battery charge indicator. Manual explains gauge function.
Power Steering:
Optional power steering on many models, which can require hydraulic system checks. Manual covers its operation and maintenance.
Telematics:
Not applicable for this era of tractor.
Engine Oil Change:
Typically every 100-250 operating hours, or annually. Manual will specify exact intervals and oil type.
Transmission Oil Change:
Typically every 500-1000 operating hours. Manual will specify type and capacity.
Engine Oil Type:
API CD or CE rated diesel engine oil, SAE 30 or 15W-40 depending on temperature. Manual will confirm exact specification.
Hydraulic Fluid Type:
Universal Tractor Transmission Fluid (UTTF) or specific David Brown hydraulic oil. Manual provides critical specification.
Coolant Type:
Ethylene glycol based antifreeze and water mixture (50/50). Manual specifies type and capacity.
Engine Starting:
Glow plug system (if equipped), fuel system priming, injector issues. Manual offers troubleshooting steps.
Hydraulic Performance:
Loss of lift, slow hydraulics due to worn pump, valve issues, or leaks. Manual details diagnostic and repair procedures.
Transmission Engagement:
Clutch wear, gearbox synchro issues (on later models if equipped), PTO engagement problems. Manual covers adjustments and repairs.
Electrical System:
Wiring harness degradation, starter motor issues, charging system problems. Manual includes wiring diagrams.
Manufacturer:
David Brown Tractors Ltd., originally a British manufacturer known for robust agricultural machinery.
Series Development:
These models represent the evolution of David Brown's popular medium-horsepower tractors, building on earlier designs and incorporating advancements through the 1960s and 1970s.
Key Models In Series:
The 770/780 series often featured 3-cylinder engines, while the 880/990 were mid-range, and the 1200/3800/4600 represented larger displacements and higher power outputs.
Manufacturing Period:
These models were primarily produced from the mid-1960s through the late 1970s.
Corporate Changes:
David Brown was acquired by Tenneco in 1972, becoming part of the Case IH family, which influenced later models and parts availability.
