🏷️ Basic Information

Make:

David Brown

Manufacturer:

David Brown Tractors (a division of Case Corporation)

Model:

780

Product Name:

Case David Brown Tractor 780 Parts Catalog

Publication Number:

TP647

👋 Introduction

Market Position:

The David Brown 780 was a versatile and popular utility tractor during its production run, serving agricultural and industrial needs. This parts catalog is crucial for owners and mechanics maintaining these robust machines.

Target Audience:

Farm owners, tractor mechanics, agricultural repair shops, parts suppliers, and historical vehicle enthusiasts.

Competitive Landscape:

Competed with similar models from manufacturers like Fordson, Massey Ferguson, and International Harvester in the mid-horsepower utility tractor segment.

Key Features:

The 780 model was known for its robust construction, reliable diesel engine, and adaptable PTO and hydraulic systems, making it suitable for a wide range of farm operations.

📋 Manual Details

Coverage Scope:

Comprehensive parts identification and cataloging for the David Brown 780 tractor.

Page Count:

119

Manual Type:

Parts Service Catalog

Language:

English

Format:

Printed Catalog (implied by historical context of TP numbers)

📖 Manual Coverage

Covered Systems:

Engine, transmission, drivetrain, hydraulics, steering, braking system, electrical system, chassis, front axle, rear axle, PTO, linkage, operator controls, operator station, bodywork, implements mounting points.

Engine Components:

Cylinder head, block, pistons, crankshaft, camshaft, valves, oil pump, water pump, fuel system components (injectors, pumps), exhaust system parts.

Transmission Components:

Gears, shafts, bearings, synchronizers, clutch assembly, PTO gearbox, differential assembly.

Hydraulic System Components:

Hydraulic pump, control valve, lift arms, draft control components, hydraulic cylinders, fluid reservoir, filter elements.

Steering System Components:

Steering column, steering box, tie rods, king pins, front axle components.

Braking System Components:

Brake discs or drums, calipers or shoes, master cylinder, brake pedal linkage, hydraulic lines.

Electrical System Components:

Starter motor, alternator, battery, wiring harnesses, lighting components (headlights, taillights), switches, instrumentation (fuel gauge, temperature gauge).

Chassis And Bodywork Components:

Frame components, drawbar, fenders, operator platform, seat mounting, radiator grille, fuel tank, battery box.

Included Procedures:

Parts identification, assembly diagrams, sub-assembly breakdowns, component listing with part numbers, exploded views for visual reference.

Assembly Diagrams:

Detailed diagrams showing the correct assembly order and relationships of components for various systems.

Part Number Identification:

Explicit listing of original equipment manufacturer (OEM) part numbers for every component illustrated.

Technical Depth:

Detailed parts breakdown for repair, replacement, and inventory management. Essential for accurate parts ordering and understanding component relationships.

Precision Level:

High precision in component identification and referencing, essential for ordering correct replacement parts.

Usage Context:

Primarily for parts ordering, inventory management, and understanding the construction of the tractor. Not a diagnostic or repair manual in terms of step-by-step procedures, but critical for acquiring the necessary parts for those procedures.

📊 Manual Specifications

File Format:

Print (historically, though digital scans may exist)

Digital Availability:

Original format is print. Digital scans (PDF) are common for historical manuals and may exist in this format.

Print Quality:

Standard for technical documentation of its era (typically black and white with clear line drawings).

Binding Type:

Stapled or perfect bound (typical for technical manuals).

Paper Type:

Durable paper stock, suitable for workshop environments.

⚙️ Engine Specifications

Engine Model:

Likely a David Brown diesel engine (specific model designation varies by variant, e.g., AD4/380, AD4/400).

Displacement:

Typically in the range of 3.5 to 4.0 liters, depending on the specific engine variant.

Horsepower Range:

Around 50-60 PTO horsepower (estimated).

Torque Output:

Estimated torque figures would be available in specific engine variant documentation, but would support heavy draft work.

Fuel Type:

Diesel

Injection System:

Likely direct injection, potentially with rotary or inline fuel pumps from manufacturers like CAV or Simms.

🔧 Transmission

Transmission Type:

Manual gearbox with multiple forward and reverse speeds.

Optional Features:

May have offered a dual-clutch system (Selectamatic or similar David Brown innovations) for enhanced operational flexibility.

Gear Selection:

Likely a main gear lever and a range selector for different operational speeds.

📐 Dimensions

Wheelbase:

Varies by specific 780 model variant (e.g., standard, narrow, low clearance).

Overall Length:

Approximately 10-12 feet (3-3.6 meters) depending on hitch configuration.

Overall Width:

Around 5-6 feet (1.5-1.8 meters) depending on tire size and axle width.

Operating Weight:

Approximately 4,000 - 4,500 lbs (1800 - 2000 kg) depending on configuration.

Tire Sizes:

Commonly fitted with rear tires around 13.6-28 or 14.9-28 and front tires around 6.00-16 or 7.50-16.

🛡️ Safety Features

Safety Considerations:

As a tractor of its era, safety features are basic. Emphasis is on operator responsibility and proper use of the machine. The catalog would identify safety-related parts like brake components, steering linkages, and guards.

Active Safety Components:

Brake system components, steering system components, lighting and signaling parts.

Passive Safety Components:

Guards for PTO shafts and moving parts, operator platform structure, fenders.

💡 Technology Features

Infotainment Systems:

Not applicable for this tractor model; features are purely functional for agricultural operations.

Driver Assistance Features:

None. Focus is on mechanical systems for operation.

Connectivity Options:

None. Analog instrumentation and mechanical controls only.

🔧 Maintenance

Typical Engine Oil Change Interval:

Often around 100-250 operating hours, depending on operating conditions and oil type used.

Typical Hydraulic Oil Change Interval:

Typically every 500-1000 operating hours.

Engine Oil Specification:

SAE 10W/30 or 15W/40 diesel engine oil (API CD or CCMC D2/D3 classification recommended).

Hydraulic Oil Specification:

TO-2 or equivalent multi-purpose tractor hydraulic fluid (e.g., 10W-30 or 20W-30 tractor oil).

Transmission Fluid Specification:

Likely same as hydraulic oil specification (TO-2 or equivalent).

Gearbox Oil Specification:

Likely shared with transmission and hydraulics; check manual for specific GL specifications if separate.

Engine Coolant Type:

Ethylene glycol based antifreeze/coolant, typically a 50/50 mix with water.

Common Wear Items:

Clutch components, brake linings, hydraulic pump seals, engine valve guides, starter motor, electrical wiring degradation.

Potential Issues:

Hydraulic system leaks, minor electrical faults, starter motor issues, potential for rust on bodywork due to age and exposure.

Common Maintenance Tasks:

Regular engine oil and filter changes, hydraulic fluid and filter changes, checking and topping up coolant, greasing pivot points, checking tire pressures, inspecting brake function.

Filter Part Numbers:

Specific part numbers for engine oil filters, fuel filters, and hydraulic filters would be detailed within the catalog.

📚 Vehicle History

Brand Heritage:

David Brown Tractors, a British manufacturer, has a long history of producing robust and reliable agricultural machinery, known for their distinctive red paint schemes.

Model Evolution:

The 780 was part of David Brown's product line in the 1960s and early 1970s, evolving from earlier models and paving the way for later Case-David Brown integrated designs after the acquisition.

Production Period:

Likely produced from the mid-1960s through the early-to-mid 1970s.

Manufacturing Location:

United Kingdom (historically, Meltham, Yorkshire).