Market Segment:
Utility Tractor, suitable for general farming, cultivation, and material handling tasks.
Competitors:
Competed with other manufacturers of similar horsepower utility tractors from the late 1960s through the 1970s, such as Massey Ferguson, Ford, John Deere, International Harvester, and Leyland.
Key Features:
Known for its robust construction, reliable diesel engine, and versatile hydraulic system. Often praised for its straightforward design and ease of maintenance, making it a popular choice for farmers.
Value Proposition:
Provides essential part information for maintaining and repairing the David Brown 996 Tractor, crucial for owners seeking to extend the lifespan and operational efficiency of their vintage machinery.
Coverage:
Comprehensive parts listing for the David Brown 996 Tractor, including all major assemblies and components.
Page Count:
Estimated 300-500 pages (typical for a tractor parts manual of this era, specific number not provided).
Manual Type:
Parts Catalog / Parts Manual
Format:
Digital Download (likely PDF)
Engine:
Detailed breakdown of engine components, including cylinder head, block, crankshaft, pistons, connecting rods, camshaft, timing gears, fuel injection system (pump, injectors), cooling system components, lubrication system components (oil pump, filter housing).
Transmission:
Complete parts listing for the gearbox, clutch assembly, PTO (Power Take-Off) drive, differential, final drives, and associated linkage.
Hydraulics:
Parts for the hydraulic lift system, including the hydraulic pump, control valve, lift arms, draft links, stabilizers, hydraulic cylinder, and associated piping and fittings.
Front Axle And Steering:
Components for the front axle, steering mechanism (steering box, tie rods, drag links), kingpins, and wheel hubs.
Rear Axle And Brakes:
Parts for the rear axle housing, brake system (brake drums, brake shoes, brake linkages, brake master cylinder), and wheel studs.
Electrical System:
Components related to the electrical system, including starter motor, generator/alternator, battery mounting, lighting (headlights, taillights, indicators), instrument panel components, and wiring harnesses (though wiring diagrams may be in a separate manual).
Operator Station:
Parts for the dashboard, instrument cluster, steering wheel, seat, fenders, control levers, pedals, and platform components.
Bodywork And Chassis:
Components for the chassis frame, engine mounting, fuel tank, oil bath air cleaner assembly, exhaust system, and fenders.
Part Identification:
Identification of all replaceable parts with corresponding part numbers and descriptive names.
Assembly Disassembly Order:
Implicit guidance on assembly and disassembly order through the logical grouping of parts within sections.
Component Breakdowns:
Detailed exploded views of each major system, illustrating how parts fit together.
Depth:
High. Provides detailed part numbers and illustrations necessary for accurate parts ordering and replacement. Essential for mechanics and owners performing repairs or sourcing spare parts.
Engine Model:
AD4/45 (4-cylinder diesel)
Engine Displacement:
Approx. 259.5 cubic inches (4.25 liters)
Bore X Stroke:
Approx. 3.94 x 4.33 inches (100 x 110 mm)
Rated Engine Hp:
Approximately 72 HP (gross at flywheel, actual PTO HP lower)
Fuel Injection System:
Indirect injection, typically Lucas or CAV inline fuel injection pump.
Cooling Type:
Water-cooled, pressurized system with thermostat and radiator.
Oil Capacity:
Approx. 16 pints (7.5 liters) - check manual for exact specification and oil type.
Transmission Type:
David Brown constant mesh gearbox with mechanical shuttle or synchromesh options depending on specific build.
Gear Configuration:
Typically 12 forward and 4 reverse gears (with splitter) or 8 forward and 2 reverse gears.
Pto:
540/1000 RPM PTO standard, with independent PTO engagement.
Clutch:
Dual-stage clutch: one for transmission drive, one for PTO engagement.
Transmission Oil Type:
EP 90 Gear Oil or equivalent for gearbox and rear axle (specifics to be verified in manual).
Wheelbase:
Approx. 86 inches (2184 mm)
Overall Length:
Approx. 140 inches (3556 mm)
Overall Width:
Approx. 70 inches (1778 mm)
Operating Weight:
Approx. 5,800 lbs (2630 kg) without ballast.
Drawbar Pull:
Capability to pull implements suitable for its horsepower class, depending on ballast and traction.
Engine Oil Change:
Typically every 250 hours or annually. Consult original service manual for precise intervals.
Transmission Oil Change:
Typically every 1000 hours or every two years. Check for specific recommendations in a service manual.
Fuel Filter Replacement:
As per manufacturer recommendation, often at oil change intervals or when issues arise.
Engine Oil Specification:
API CD or CE service classification, SAE 15W/30 or 20W/40 depending on ambient temperature. Consult original manual.
Hydraulic Fluid Type:
David Brown Hy-Trans or equivalent Universal Tractor Transmission Fluid (UTTO) for the hydraulic and transmission systems (common, but verify).
Common Wear Items:
Clutch wear, PTO clutch pack wear, hydraulic pump seals, starter motor brushes, kingpin bushings, and transmission synchros.
Engine Issues:
Fuel injection pump timing, injector condition, potential for head gasket failure if overheated.
Air Filter Maintenance:
Regular cleaning or replacement of the oil bath air cleaner element is critical for engine longevity.
Manufacturer:
David Brown Tractors Ltd., a British agricultural machinery manufacturer.
Acquisition:
David Brown was acquired by Tenneco in 1970, becoming part of Case IH. The David Brown name continued to be used for a period.
Predecessor Model:
The 996 was part of the 'new generation' of David Brown tractors that followed models like the 880, 990, and 995.
Successor Model:
The 996 was eventually succeeded by models under the Case IH branding, though the lineage continued with tractors like the Case 94 series.
Production Years:
Approximately 1970 - 1975.
Manufacturing Location:
Meltham, West Yorkshire, England.
