Segment:
Medium-duty agricultural tractor
Competitors:
Fordson Super Major, Massey Ferguson 65, International Harvester B-450, John Deere 3020 (relative to class and era).
Features:
Known for robust construction, reliable David Brown diesel engines, and versatile PTO and hydraulic systems common for its era.
Engine:
Detailed troubleshooting, overhaul, and repair procedures for the David Brown diesel engine (likely AD4/55 or similar).
Fuel System:
Injection pump, injectors, fuel lines, filters, troubleshooting and adjustment.
Cooling System:
Radiator, thermostat, water pump, hoses, fan, and associated components.
Lubrication System:
Oil pump, filters, oil pressure, lubrication points, and oil change procedures.
Transmission:
Gearbox, clutch, PTO gearbox, differential, final drives, hydraulic lift mechanism, and associated components.
Hydraulics:
Hydraulic pump, control valve, lift arms, remote hydraulics, and troubleshooting.
Steering System:
Manual steering components, linkage, and adjustments.
Braking System:
Service brakes, parking brake, adjustments, and maintenance.
Electrical System:
Wiring diagrams, starter motor, generator/alternator, battery, lighting, and ignition (if applicable).
Chassis And Body:
Frame, fenders, operator platform, controls, and sheet metal.
Maintenance:
Scheduled maintenance, lubrication, filter changes, fluid checks, and adjustments.
Troubleshooting:
Diagnostic charts and step-by-step procedures for common problems and system failures.
Repair:
Detailed instructions for component removal, disassembly, inspection, repair, reassembly, and installation.
Overhaul:
Complete engine and transmission overhaul procedures.
Adjustment:
Clutch adjustment, brake adjustment, valve clearance adjustment, fuel injection timing, hydraulic control adjustments.
Depth:
Comprehensive, factory-level detail suitable for professional mechanics and experienced DIY technicians.
Quality:
Digital format, searchable text, and likely high-resolution scanned pages for clarity.
Binding:
Not Applicable (Digital Download)
Paper:
Not Applicable (Digital Download)
Software:
Adobe PDF Reader, WinZip (for potential archive extraction)
Operating Systems:
All versions of Windows and Mac OS
Engine Model:
Likely David Brown AD4/55 or similar 4-cylinder diesel engine.
Displacement:
Approx. 3.7 Liters (225 cubic inches) - specific to engine variant.
Horsepower:
Approximately 55-65 PTO horsepower (varies by specific model and engine tuning).
Torque:
Estimated at 140-160 lb-ft (varies).
Injection Type:
Direct injection, likely with CAV or Simms fuel injection pump.
Cooling Medium:
Water-cooled
Oil Capacity:
Approximately 7-8 quarts (7.5-8.5 liters) - consult manual for exact capacity.
Transmission Type:
David Brown 'Trailed Speed' gearbox (typically 10 forward, 2 reverse speeds, or variations thereof).
Clutch Type:
Dual-stage clutch (one for transmission, one for PTO)
Pto:
Independent PTO (540 RPM standard, potentially 540/1000 RPM options)
Differential Lock:
Yes, foot-operated differential lock for improved traction.
Transmission Oil Type:
API GL-4, SAE 90 or 80W-90 gear oil. Consult manual for exact specification and capacity.
Length:
Approx. 125-135 inches (3175-3429 mm) - varies with linkage.
Width:
Approx. 65-75 inches (1651-1905 mm) - varies with tire size.
Operating Weight:
Approx. 5,000-6,000 lbs (2268-2722 kg) - varies with configuration.
Front Tire Size:
Typically 6.00-16 or 7.50-16.
Rear Tire Size:
Typically 13.6-28 or 14.9-28.
Engine Oil Change:
Typically every 100-200 operating hours or annually, consult manual for specifics.
Fuel Filter Replacement:
Recommended at every oil change or as needed if experiencing fuel system issues.
Air Filter Cleaning Replacement:
Check and clean daily in dusty conditions; replace as per manual recommendations.
Engine Oil Type:
API CD or CE, SAE 15W-40 or 30. Consult manual for exact specification and temperature range.
Hydraulic Fluid Type:
David Brown Transmission Oil (DBTO) or equivalent tractor hydraulic fluid (THF). Consult manual for exact type and capacity.
Common Problems:
Potential for worn hydraulic pump/valves causing weak lift, clutch wear, front axle kingpin wear, and general aging of seals and hoses.
Electrical Wear:
Aging wiring harnesses and connections can lead to intermittent electrical faults.