Engine:
Assembly, cylinders, timing, valves, lubrication, cooling, fuel system
Drivetrain:
Clutch, transmission, final drive, differential, axles
Chassis And Steering:
Front system, steering gear, brakes
Auxiliary Systems:
Cooling system, electrical system, lift system, Power Take-Off (PTO), Governor (Diesel, LP-Gas), LP-Gas System
Engine Assembly:
Complete engine disassembly, inspection, repair, and reassembly procedures.
Engine Timing:
Precise instructions for setting engine timing for diesel and LP-Gas variants.
Lift System:
Coverage of the tractor's hydraulic lift system, including components and troubleshooting.
Power Take Off:
Service and repair procedures for the PTO system.
Electrical System:
Wiring diagrams, starter, alternator, battery, lighting, and ignition system service.
Governor System:
Service and calibration of diesel and LP-Gas governors for engine speed control.
Maintenance:
Routine maintenance, scheduled service, fluid checks, lubrication
Troubleshooting:
Identification of common problems, diagnostic procedures
Repair:
Step-by-step repair instructions for all major systems
Rebuild:
Detailed procedures for engine, transmission, and component rebuilds
Adjustments:
Valve adjustment, clutch adjustment, brake adjustment, governor settings
Troubleshooting Specific Issues:
Guidance for resolving common operational issues such as poor starting, loss of power, or abnormal noises.
Steering System Repair:
Detailed steps for servicing the steering gear and associated components.
Brake System Service:
Instructions for brake adjustment, relining, and hydraulic brake system maintenance.
Depth:
Comprehensive, covering diagnostics, disassembly, repair, reassembly, and specifications
Diagnostics:
Detailed diagnostic procedures for engine, transmission, hydraulic, and electrical systems.
Specifications Data:
Includes torque recommendations for critical fasteners, clearances, fluid capacities, and electrical specifications.
Engine Rebuild:
Comprehensive instructions for complete engine overhaul, including piston, ring, bearing, and seal replacement.
Engine Type:
Diesel (likely British Leyland/Perkins based, typical for David Brown tractors of this era)
Engine Displacement Estimate:
Likely in the range of 3.0L - 4.0L (specifics depend on exact engine variant)
Engine Cylinder Count:
Likely 3 or 4 cylinders
Fuel System Type:
Direct Injection Diesel (typical)
Lp Gas System Availability:
Yes, the manual covers an LP-Gas governor, indicating an LP-Gas engine option.
Horsepower Estimate:
Likely in the 70-90 PTO horsepower range (specific figures vary by engine variant and PTO type, consult manual)
Torque Estimate:
Likely in the 200-250 lb-ft range (specific figures vary, consult manual)
Engine Oil Change:
Typically 250-500 hours, depending on operating conditions (specific interval in manual)
Air Filter Service:
As needed, or at regular intervals (e.g., 250 hours) depending on dust conditions.
Fuel Filter Replacement:
Typically annually or every 500 hours (specific interval in manual)
Engine Oil Type:
API CD or CE rated diesel engine oil, viscosity typically 15W-40 or 10W-30 depending on climate (specific grade in manual)
Coolant Type:
Ethylene glycol based antifreeze, typically a 50/50 mix with water (specific type and concentration in manual)
Hydraulic Fluid Type:
Tractor Hydraulic Fluid (THF) or universal tractor transmission oil (UTTO) conforming to specific standards (e.g., API GL-4). Manual will specify.
Common Wear Points:
Clutch wear, brake system components, steering linkages, potential for hydraulic system leaks in older units.
Engine Tuning:
Importance of correct injection timing and valve clearances for optimal performance and longevity.
Hydraulic System:
Potential for pump wear or leaks in high-hour units, control valve issues.
Parent Company History:
David Brown was a significant British tractor manufacturer, later acquired by Tenneco (which also owned CASE IH). This indicates a lineage of robust agricultural machinery.
Model Era:
The 1390 likely belongs to the late 1970s to early 1980s era of David Brown tractor development, a period known for durable and practical farm equipment.
David Brown Legacy:
Represents a continuation of David Brown's reputation for robust, no-nonsense farm machinery.
Manufacturing Location Estimate:
United Kingdom (typical for David Brown tractors)
