🏷️ Basic Information Identification Make: David Brown Model: 1494 Tractor Vehicle Type: Agricultural Tractor 👋 Introduction Market Position Target Audience: Professional technicians, DIY mechanics, tractor owners and operators Key Features Value Proposition: Enables self-sufficient maintenance and repair, reducing labor costs and downtime 📋 Manual Details Coverage Areas Primary Coverage: Workshop Service and Repair Page Count Estimated Page Count: Hundreds of pages (typical for comprehensive workshop manuals) Manual Type Type: Workshop Service Manual / Repair Manual Language Language: English Format Delivery Method: Instant Download File Format: PDF 📖 Manual Coverage Systems Covered Engine: Engine overhaul, maintenance, troubleshooting, fuel system, lubrication, cooling system, starting system Transmission: Gearbox overhaul, clutch service, PTO operation, differential, final drives Hydraulics: Hydraulic system diagnosis, pump service, cylinder repair, control valve operation, hydraulic fluid specifications Electrical: Wiring diagrams, lighting system, starting and charging system, instrument panel, accessory circuits Chassis And Body: Front axle, steering system, braking system, rear axle, hitch system, operator station, body panels Procedures Included Maintenance: Scheduled maintenance charts, lubrication points, filter replacement, fluid level checks Troubleshooting: Diagnostic flowcharts for common problems, symptom-based fault finding Repair: Step-by-step repair instructions for all major components and systems Overhaul: Complete engine, transmission, and hydraulic system overhaul procedures Technical Depth Depth: Comprehensive, suitable for professional technicians and experienced DIY mechanics 📊 Manual Specifications File Format Requirements: Adobe PDF Reader, WinRAR Print Quality Printability: Full Printable Zoom Capability: Zoom IN/OUT Binding Type Binding Type: Digital (PDF download, no physical binding) Paper Type Paper Type: Not Applicable (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: David Brown AD Series (likely AD4/55 or similar variant, based on commonality) Displacement: Typically around 3.9 liters (236 cubic inches) for this series, but requires manual confirmation. Cylinders: 4-cylinder, naturally aspirated diesel Performance Horsepower Rating: Advertised PTO horsepower typically in the 60-70 HP range (actual specifications depend on specific engine tune and regulations). Fuel System Injection System: Bosch inline injection pump (typical for the era) 🔧 Transmission Standard Transmission Type: David Brown Transmatic or constant mesh gearbox with 12 forward and 4 reverse gears (plus creeper gears on some models) Features Pto: Standard 540 RPM PTO, optional 1000 RPM PTO 📐 Dimensions Exterior Wheelbase: Approximately 2100 mm (83 inches) - Requires specific confirmation from manual. Weights Operating Weight: Around 2600-3000 kg (5700-6600 lbs) - Varies with configuration. 💡 Technology Features Infotainment Infotainment System: Basic analog instrumentation (tachometer, engine temperature, oil pressure, fuel gauge). No modern infotainment system. Driver Assistance Driver Assistance Features: Mechanical power steering (often optional or integrated), differential lock. No electronic driver assistance. 🔧 Maintenance Service Intervals Engine Oil Change: Typically every 250 hours or annually, but specific interval must be confirmed from manual. Air Filter Service: Check at 100 hours, replace as needed or annually. Dry element type. Fluid Specifications Engine Oil Type: API CD or higher, SAE 15W-40 or 10W-30 (cold climates). Capacity approximately 8.2 liters (8.7 US quarts). Hydraulic Fluid Type: David Brown HTMA Type C or equivalent (e.g., CAT TO-2 specification, typically an ISO VG 46 hydraulic oil). Known Issues Common Wear Points: Wear in the clutch, PTO clutch pack, hydraulic pump and valve spools, steering box, and front axle kingpins are common on older units. Engine Idling Problems: Can be related to fuel filter clogging, injection pump timing, or governor issues. 📚 Vehicle History Brand Heritage Manufacturer Origin: United Kingdom Model Evolution Production Era: Late 1970s to early 1980s. The 1494 was part of a series that succeeded earlier David Brown models. Production Parent Company: David Brown Tractors was acquired by Tenneco (owner of Case) in 1971, so production was under Tenneco/Case.