Target Audience:
Owners of David Brown 1390 tractors with basic mechanical skills, independent service professionals, and authorized dealer service departments.
Value Proposition:
Provides the same specifications and procedures as official dealer manuals, enabling cost savings on maintenance and repairs by empowering users to perform their own servicing.
Clarity And Conciseness:
Accurate, clear, and concise text combined with illustrations for easy understanding and execution of repairs.
Vendor Authorship:
Written by the manufacturers, ensuring accuracy and authenticity.
Resource Availability:
Provides the necessary resources and tools (informationally) to tackle repairs that might otherwise seem daunting.
Engine:
Complete overhaul, diagnostics, fuel system, lubrication, cooling system, exhaust system, starting system.
Transmission:
Gearbox overhaul, clutch, PTO drive, hydraulics, differentials, final drives, power steering.
Electrical:
Wiring diagrams, starter motor, alternator, battery, lighting system, instrumentation.
Chassis And Body:
Front axle, steering system, rear axle, brakes (hydraulic, mechanical), hitch assembly, mounting points, operator station.
Maintenance:
Scheduled maintenance, lubrication points, fluid checks and changes, filter replacements.
Troubleshooting:
Diagnostic flowcharts, symptom-based troubleshooting, component testing.
Repair:
Step-by-step repair instructions for all major components and systems, including disassembly, inspection, repair, and reassembly.
Installation:
Instructions for replacing or installing specific parts and accessories.
Depth:
Comprehensive, covering basic to advanced mechanical repairs and diagnostics, suitable for professional technicians and informed owners.
Engine Type:
Likely a naturally aspirated diesel engine, common for this era of tractor. Specific model details are not provided in the product information, but typically David Brown tractors of this size used their own in-house diesel engines or engines from reputable suppliers like Perkins.
Horsepower Range:
Typically in the 70-90 HP range for a tractor of this model designation, though exact figures would be found within the manual.
Torque Specifications:
Detailed torque specifications for all engine components would be present in the manual.
Injection System:
Details on the fuel injection pump and injectors, likely a mechanical rotary or inline type, would be covered.
Transmission Type:
Likely a synchronized or unsynchronized manual gearbox, possibly with multiple speed ranges (e.g., 8 forward, 2 reverse or more).
Optional Features:
Potential for creeper gears or a dual-speed Power Take-Off (PTO).
Power Take Off:
Details on PTO operation and maintenance, including speed configurations (e.g., 540/1000 RPM).
Overall Length:
Specific dimensions would be detailed in the manual, but typical for a tractor of this class would be around 3.5-4 meters.
Overall Width:
Specific dimensions would be detailed in the manual, typically around 1.8-2.2 meters.
Operating Weight:
Likely in the range of 3,000-4,000 kg, exact specifications in manual.
Rollover Protection:
Information regarding the tractor's design for ROPS (Rollover Protective Structure) compatibility or installation would be covered.
Braking System:
Detailed procedures for maintaining and repairing the hydraulic and mechanical braking systems.
Operator Station:
Guidance on safety features within the operator's cab or on the platform, if applicable.
Engine Oil Change:
Typical intervals for diesel engines of this era would be every 250-500 operating hours, with specific recommendations provided in the manual.
Hydraulic Fluid Change:
Intervals for hydraulic and transmission fluid changes are critical for longevity and would be clearly specified.
Engine Oil:
The manual will specify the correct API service classification (e.g., CD, CE) and viscosity grade (e.g., SAE 15W-40) for the engine oil.
Hydraulic Fluid:
Recommendations for hydraulic/transmission fluid type (e.g., UTF - Universal Tractor Transmission fluid) and viscosity will be provided.
Coolant:
Specification for the engine coolant mixture (e.g., ethylene glycol base, concentration) for the cooling system.
Common Wear Items:
While not explicitly stated, typical issues for tractors of this age include wear in the transmission synchronizers, PTO clutch packs, and potential hydraulic pump or cylinder leaks. The manual will address diagnostics for these.
Oil Filter:
The manual will list the OEM part number or equivalent cross-reference for the engine oil filter.
Fuel Filter:
The manual will list the OEM part number or equivalent cross-reference for the fuel filter(s).
David Brown Legacy:
David Brown was a significant British tractor manufacturer known for robust and reliable agricultural machinery from the mid-20th century. The brand has a long history of innovation in tractor design.
1300 Series Context:
The 1390 is part of a series of tractors that represented David Brown's offering in the medium horsepower agricultural segment. The '90' series typically denoted a progression in engine technology and features.
Production Period:
Likely produced in the late 1970s and early 1980s, a period of significant evolution in tractor technology.
