Target User:
Farmers, mechanics, agricultural workshops, and tractor restorers.
Value Proposition:
Provides essential, detailed technical information for maintaining and repairing the David Brown 880/990, saving time and money on repairs.
Download Method:
Instant download for immediate access.
Content Clarity:
Written in a clear, understandable manner for a wide range of users.
Visual Aid Emphasis:
Heavy reliance on visual aids (diagrams, photos) for clarity.
Currency:
Represents manufacturers' specifications and procedures for the covered models.
Engine:
Complete engine overhaul, tuning, diagnostics, and component repair.
Fuel System Diesel:
Diesel fuel injection system, pumps, injectors, filters, and troubleshooting.
Fuel System Petrol:
Petrol carburetor system, tuning, cleaning, and repair.
Ignition System:
Spark plug service, timing, coil, distributor (where applicable), and electrical troubleshooting.
Cooling System:
Radiator, water pump, thermostat, hoses, coolant specifications, and system flushing.
Clutch:
Single and Dual Disc clutch service, adjustment, replacement, and flywheel inspection.
Transmission:
Gearbox overhaul, shifting mechanisms, bearing replacement, and fluid specifications.
Final Drive Assembly:
Inspection, lubrication, and repair of axle shafts, gears, and housing.
Rear Axle:
Differential case, axle shafts, bearings, and brake drum/disc integration.
Front Axle:
Steering knuckles, kingpins, wheel bearings, and lubrication.
Steering Gear:
Steering box adjustment, linkage repair, and lubrication.
Brake System:
Drum or Disc brake service, adjustment, hydraulic systems, and fluid specifications.
Hydraulic Lift System:
Hydraulic pump, control valve, lift arms, cylinder, and fluid type. Troubleshooting hydraulic performance.
Power Steering:
Hydraulic steering assist system components, fluid, and troubleshooting.
Power Take Off:
PTO engagement, shaft, gearbox, and related components.
Electrical System:
Wiring diagrams, starter, generator/alternator, battery maintenance, lighting, and instrumentation.
Belt Pulley:
Drive belt inspection, tensioning, and replacement for accessories.
Maintenance:
Routine servicing, lubrication points, fluid checks, filter changes, and tune-up procedures.
Troubleshooting:
Diagnostic procedures for common and uncommon faults across all systems.
Repair:
Step-by-step repair instructions for individual components and assemblies.
Rebuilds:
Comprehensive instructions for complete engine, transmission, and hydraulic system rebuilds.
Adjustments:
Setting clearances, preloads, timing, and control linkages.
Disassembly Assembly:
Detailed guidance on taking apart and reassembling various tractor components.
Depth:
Comprehensive workshop level, suitable for experienced mechanics and dedicated owners.
Diagnostics:
Includes specific diagnostic flowcharts and symptom-based troubleshooting guides.
Illustrations:
Extensive use of detailed illustrations, diagrams, drawings, and photographs.
Specifications:
Includes critical torque values, clearances, fluid capacities, and performance data.
Engine Type:
Typically diesel, with petrol variants for some models.
Bore Stroke:
Specifics would be detailed within the manual, but common for the era would be around 3.5" x 4.5" for a 4-cylinder diesel.
Displacement:
Varies by specific engine option, but models like 880/990 often featured engines in the 3-4 liter range (e.g., 214.3 cu in / 3.5L or 240 cu in / 3.9L).
Horsepower:
Approx. 45-60 HP, depending on specific engine and tune.
Torque:
Manufacturer specifications provided in the manual.
Fuel Type:
Diesel, Petrol (Gasoline) for specific variants.
Injection System Diesel:
Typically Lucas or CAV rotary injection pumps.
Carburetor Petrol:
Details on specific Solex, Zenith, or SU carburetors used.
Engine Oil Change:
Typically every 100-150 operating hours or annually.
Transmission Fluid Change:
Generally every 600-1000 operating hours.
Engine Oil Type:
The manual will specify SAE viscosity grade (e.g., SAE 30 or 15W-40) and API service classification (e.g., CD or CE).
Hydraulic Fluid Type:
Specific hydraulic fluid or universal tractor transmission fluid (UTTO) with compatible properties will be listed. Likely an ISO VG 46 or similar.
Coolant Type:
Ethylene glycol based antifreeze mixture with corrosion inhibitors.
Common Wear Items:
Clutch wear, hydraulic pump and seal leaks, starter motor reliability, PTO clutch engagement, and brake lining wear.
Engine Related:
Potential for injector pump calibration drift, glow plug issues (diesel), and carburetor jetting issues (petrol).
