Target Audience:
David Brown tractor owners, mechanics, technicians, restoration enthusiasts
Value Proposition:
Provides professional-level repair and maintenance information for a broad range of David Brown Implematic models, enabling self-sufficiency in upkeep and repairs.
Content Quality:
Factory-level detail with hundreds of pages of information, including photos and diagrams.
Accessibility:
Instant PDF download for immediate access on various devices.
Engine Service:
Complete overhaul, diagnostics, tuning, component replacement
Fuel System:
Fuel injection pump, injectors, fuel lines, filters, bleeding procedures
Cooling System:
Radiator, thermostat, water pump, hoses, coolant specifications
Lubrication System:
Oil pump, oil filter, oil pressure, oil specifications and capacities
Transmission And Drivetrain:
Gearbox, differential, rear axle, PTO (Power Take-Off), Implematic hydraulics
Hydraulic System:
Implement control system, hydraulic pump, valves, cylinders, fluid specifications
Electrical System:
Starter motor, alternator, battery, lighting, wiring diagrams, ignition system (if applicable)
Braking System:
Brake operation, adjustments, fluid specifications
Steering System:
Steering box, linkage, adjustments
Chassis And Suspension:
Front axle, steering components, rear axle housing
Bodywork And Fittings:
Fenders, seat, controls, dashboard components
Maintenance:
Scheduled servicing, oil changes, filter replacements, lubrication points, general upkeep
Troubleshooting:
Diagnostic charts, fault finding for all major systems, common problems and solutions
Repair Operations:
Step-by-step instructions for component removal, overhaul, and reassembly
Engine Rebuild:
Detailed procedures for dismantling, inspecting, and rebuilding the engine
Hydraulic System Repair:
Repair of hydraulic pump, valves, rams, and control mechanisms
Transmission Overhaul:
Procedures for gearbox, differential, and PTO unit repairs
Electrical Diagnostics:
Troubleshooting electrical faults using wiring diagrams and test procedures
Depth:
Comprehensive (covers all repairs, servicing, and troubleshooting procedures)
Detail Level:
High (detailed photos, diagrams, exploded views, step-by-step instructions)
Torque Specifications:
Essential torque values for all critical fasteners will be included.
Clearances:
Engine valve clearances, bearing clearances, gear backlash, etc. will be specified.
Timing Specifications:
Engine timing procedures and specifications will be detailed.
Engine Type:
Four-cylinder, direct-injection diesel engine (specific engine families like AD4.177, AD4.203, etc. likely covered)
Horsepower Range:
Varies by model, typically 40-60 HP (exact figures per model and series variant to be confirmed in manual)
Torque Range:
Varies by model, designed for agricultural applications (specific figures to be confirmed in manual)
Injection System:
Bosch or CAV fuel injection pumps (specific types to be detailed)
Engine Oil Change:
Typically every 100-150 operating hours or annually (specific interval in manual)
Fuel Filter Replacement:
Recommended at specified intervals or when experiencing fuel system issues (e.g., every 250 hours)
Hydraulic Fluid Change:
Typically every 500-1000 operating hours or annually
Engine Oil Type:
API CD or equivalent, SAE 30 or 10W-30 depending on climate (specifics in manual)
Hydraulic Fluid Type:
David Brown Hy-Trans fluid or equivalent (e.g., UTF - Universal Tractor Transmission fluid) – specific viscosity and GL ratings will be detailed.
Coolant Type:
Ethylene glycol based antifreeze/coolant (e.g., 50/50 mix with distilled water)
Hydraulic System Leaks:
Common with age, often related to worn seals or hoses. Manual will detail repair.
Engine Starting:
Glow plug system and fuel system priming are critical for cold starts. Manual covers troubleshooting.
Transmission Engagement:
Wear in clutch components or Implematic system can affect gear changes. Manual details adjustment and repair.
Manufacturer:
David Brown Tractors Ltd., Huddersfield, England
Company Focus:
Known for robust, well-engineered tractors, particularly in the post-war era.
Implematic Introduction:
The Implematic transmission was a key development, offering enhanced operational ease and efficiency for agricultural tasks.
Production Period:
The 850, 880, 950, and 990 series were produced from the late 1950s through the 1960s, with some overlapping into the early 1970s.
