🏷️ Basic Information Identification Make: Leyland Model: 255 / 270 Model Variant: Also designated as 344 (for 255) and 384 (for 270) Codes Internal Codes: Likely tied to specific serial number ranges for each model 👋 Introduction Market Position Target Audience: Owners, service technicians, agricultural mechanics, and restoration specialists working on Leyland 255 and 270 tractors. Competitive Analysis Value Proposition: Provides essential technical data and repair procedures, enabling cost savings on maintenance and repairs by empowering users to perform tasks themselves. Key Features Manual Benefits: Step-by-step instructions, detailed diagrams, troubleshooting guidance, enabling efficient and accurate repairs. Ease Of Use: Features step-by-step instructions and pictures for ease of understanding and execution of repair tasks. 📋 Manual Details Coverage Areas Main Coverage: Comprehensive service and repair procedures for Leyland 255 (344) and 270 (384) tractors. Specific Systems: Engine, transmission, hydraulics, braking system, electrical system, steering, front axle, rear axle, PTO, chassis, bodywork, operator station. Page Count Estimated Page Count: Typically between 300-500 pages for complete workshop manuals of this era and coverage. Manual Type Type: Complete Workshop Service Repair Manual Language Language: English Format Format: Downloadable digital format (PDF compatible) 📖 Manual Coverage Systems Covered Engine Systems: Engine overhaul, fuel system, lubrication system, cooling system, air intake and exhaust systems, cylinder head, pistons, crankshaft, camshaft, timing gears. Transmission Systems: Gearbox disassembly, reassembly, inspection, clutch, final drives, differential, PTO engagement mechanisms. Hydraulic Systems: Hydraulic pump, control valves, lift cover, cylinders, hydraulic fluid specifications, troubleshooting hydraulic issues. Electrical Systems: Wiring diagrams, starter motor, alternator, battery, lighting, instrumentation, troubleshooting electrical faults. Front Axle Steering: Front axle beam, kingpins, steering linkages, steering box (if mechanical or hydraulic). Rear Axle Brakes: Differential, final drives, brake assemblies, rear PTO housing. Procedures Included Maintenance Procedures: Routine servicing, lubrication points, filter changes, fluid level checks, pre-delivery inspections. Repair Procedures: Step-by-step instructions for component removal, overhaul, and reinstallation, including torque specifications. Troubleshooting Guides: Diagnostic charts and procedures for identifying and resolving common operational issues. Cylinder Head Overhaul: Valve seat grinding, valve guide replacement, gasket replacement, torque sequences. Hydraulic Lift System Repair: Diagnosis and repair of the draft control and position control systems, including cylinder seals and control valve adjustments. Technical Depth Depth Of Coverage: Comprehensive from basic maintenance to complete engine and transmission rebuilds, suitable for professional mechanics and advanced DIY users. Engine Rebuild Detail: Specifications for crankshaft bearing clearance, piston ring gap, cylinder bore honing, torque settings for main bearing caps and connecting rods. Transmission Rebuild Detail: Gearset inspection, bearing replacement, synchromesh ring service, shaft end float specifications. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text content Compatibility: Compatible with all PC and MAC computers, tablets, and mobile phones via Adobe Reader. Print Quality Printability: High-resolution digital pages suitable for printing individual sections or the entire manual. Binding Type Binding: N/A (Digital format) Paper Type Paper Quality: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Type: Leyland 4/98 series diesel engine (likely naturally aspirated variants for these models). Engine Type Leyland 255 (344) Engine: Leyland 4/98 NT (Naturally Aspirated), 4-cylinder diesel Leyland 270 (384) Engine: Leyland 4/98 NT (Naturally Aspirated), 4-cylinder diesel (Higher displacement/power variant) Performance Leyland 255 (344) Horsepower: Approximately 55-60 PTO HP (specifications may vary slightly based on exact configuration and rating). Leyland 270 (384) Horsepower: Approximately 70-75 PTO HP (specifications may vary slightly based on exact configuration and rating). Fuel System Fuel Injection Type: Bosch inline injection pump or similar, depending on specific build. Fuel Filter Part Number: Manual would specify exact part numbers from manufacturers like Lucas, CAV, or Bosch, e.g., 'FFAXXXX' series or equivalent. Lubrication System Engine Oil Capacity Litres: Approximately 7.7 - 8.5 litres (Manual will provide exact figure). Engine Oil Specification: Typically API CD or CE rated, SAE 15W-30 or 15W-40 for general use. Manual will detail specific viscosity and API rating. Cooling System Coolant Capacity Litres: Approximately 15-17 litres (Manual will provide exact figure). Coolant Type: Ethylene Glycol based antifreeze with corrosion inhibitors, typically a 50/50 mix with distilled water. 🔧 Transmission Standard Gearbox Type: Leyland '30-Series' 10-speed (9 forward + 1 reverse) constant mesh gearbox with a high/low range splitter or syncromesh options depending on model/year. Optional Creeper Gear: Optional creeper gear was available on some models. Features Transmission Fluid Capacity Litres: Approximately 16-18 litres (Manual will confirm exact figure). Transmission Fluid Specification: Typically a universal tractor transmission oil (UTTO) or API GL-4 gear oil. Manual will specify exact viscosity and specification. 📐 Dimensions Exterior Length Mm: Approx. 3600-3800 mm (Varies based on configuration) Width Mm: Approx. 1800-2000 mm (Varies based on tire size) Height Mm: Approx. 2200-2350 mm (to top of exhaust stack, without cab) Weights Unladen Weight Kg: Approx. 2500-2800 kg (Varies based on configuration and presence of cab/weights) Front Axle Weight Kg: Manual will provide split weight distribution. Rear Axle Weight Kg: Manual will...
Also designated as 344 (for 255) and 384 (for 270)
Codes
Internal Codes:
Likely tied to specific serial number ranges for each model
👋 Introduction
Market Position
Target Audience:
Owners, service technicians, agricultural mechanics, and restoration specialists working on Leyland 255 and 270 tractors.
Competitive Analysis
Value Proposition:
Provides essential technical data and repair procedures, enabling cost savings on maintenance and repairs by empowering users to perform tasks themselves.
Key Features
Manual Benefits:
Step-by-step instructions, detailed diagrams, troubleshooting guidance, enabling efficient and accurate repairs.
Ease Of Use:
Features step-by-step instructions and pictures for ease of understanding and execution of repair tasks.
📋 Manual Details
Coverage Areas
Main Coverage:
Comprehensive service and repair procedures for Leyland 255 (344) and 270 (384) tractors.
Diagnosis and repair of the draft control and position control systems, including cylinder seals and control valve adjustments.
Technical Depth
Depth Of Coverage:
Comprehensive from basic maintenance to complete engine and transmission rebuilds, suitable for professional mechanics and advanced DIY users.
Engine Rebuild Detail:
Specifications for crankshaft bearing clearance, piston ring gap, cylinder bore honing, torque settings for main bearing caps and connecting rods.
Transmission Rebuild Detail:
Gearset inspection, bearing replacement, synchromesh ring service, shaft end float specifications.
📊 Manual Specifications
File Format
File Type:
PDF
Searchability:
Searchable text content
Compatibility:
Compatible with all PC and MAC computers, tablets, and mobile phones via Adobe Reader.
Print Quality
Printability:
High-resolution digital pages suitable for printing individual sections or the entire manual.
Binding Type
Binding:
N/A (Digital format)
Paper Type
Paper Quality:
N/A (Digital format)
⚙️ Engine Specifications
Primary Engine
Engine Type:
Leyland 4/98 series diesel engine (likely naturally aspirated variants for these models).
Engine Type
Leyland 255 (344) Engine:
Leyland 4/98 NT (Naturally Aspirated), 4-cylinder diesel
Leyland 270 (384) Engine:
Leyland 4/98 NT (Naturally Aspirated), 4-cylinder diesel (Higher displacement/power variant)
Performance
Leyland 255 (344) Horsepower:
Approximately 55-60 PTO HP (specifications may vary slightly based on exact configuration and rating).
Leyland 270 (384) Horsepower:
Approximately 70-75 PTO HP (specifications may vary slightly based on exact configuration and rating).
Fuel System
Fuel Injection Type:
Bosch inline injection pump or similar, depending on specific build.
Fuel Filter Part Number:
Manual would specify exact part numbers from manufacturers like Lucas, CAV, or Bosch, e.g., 'FFAXXXX' series or equivalent.
Lubrication System
Engine Oil Capacity Litres:
Approximately 7.7 - 8.5 litres (Manual will provide exact figure).
Engine Oil Specification:
Typically API CD or CE rated, SAE 15W-30 or 15W-40 for general use. Manual will detail specific viscosity and API rating.
Cooling System
Coolant Capacity Litres:
Approximately 15-17 litres (Manual will provide exact figure).
Coolant Type:
Ethylene Glycol based antifreeze with corrosion inhibitors, typically a 50/50 mix with distilled water.
🔧 Transmission
Standard
Gearbox Type:
Leyland '30-Series' 10-speed (9 forward + 1 reverse) constant mesh gearbox with a high/low range splitter or syncromesh options depending on model/year.
Optional
Creeper Gear:
Optional creeper gear was available on some models.
Features
Transmission Fluid Capacity Litres:
Approximately 16-18 litres (Manual will confirm exact figure).
Transmission Fluid Specification:
Typically a universal tractor transmission oil (UTTO) or API GL-4 gear oil. Manual will specify exact viscosity and specification.
📐 Dimensions
Exterior
Length Mm:
Approx. 3600-3800 mm (Varies based on configuration)
Width Mm:
Approx. 1800-2000 mm (Varies based on tire size)
Height Mm:
Approx. 2200-2350 mm (to top of exhaust stack, without cab)
Weights
Unladen Weight Kg:
Approx. 2500-2800 kg (Varies based on configuration and presence of cab/weights)
Front Axle Weight Kg:
Manual will provide split weight distribution.
Rear Axle Weight Kg:
Manual will provide split weight distribution.
🛡️ Safety Features
Ratings
Rollover Protection:
ROPS (Roll Over Protective Structure) typically an optional or later factory-fitted item. Manual will detail specific configurations and safety requirements.
Active Features
Braking System Type:
Hydraulically operated, self-energizing drum brakes or enclosed wet disc brakes on rear axle.
Parking Brake:
Independent mechanical parking brake.
Passive Features
Seat Belt:
Seat belts were often optional or an aftermarket fitment on early models. Manual will discuss safety considerations for operator seating.
💡 Technology Features
Infotainment
Dashboard Features:
Basic instrumentation including oil pressure gauge, water temperature gauge, ammeter, tachometer, and hour meter. No modern infotainment systems.
Driver Assistance
Power Steering:
Power steering was an option on some later models, improving maneuverability. Manual will detail operation if equipped.
Connectivity
P T O Shaft:
Standard 540 RPM PTO, with potential for 1000 RPM PTO on some variants. Manual details engagement and maintenance.
🔧 Maintenance
Service Intervals
Engine Oil Change Hours:
Typically 250 hours, but always refer to the manual for specific intervals.
Fuel Filter Replacement Hours:
Recommended at engine oil change intervals, or as specified.
Air Filter Maintenance Hours:
Service air filter (clean or replace) based on operating conditions, typically every 100-200 hours. Manual will detail specific service actions.
Fluid Specifications
Hydraulic Fluid Specification:
Manual will specify UTTO or specific tractor hydraulic oil (e.g., ISO VG 46/68). For example, 'Leyland Hydraulic Oil' or equivalent from manufacturers like Shell, Mobil, Castrol.
Known Issues
Common Wear Points:
Clutch wear, PTO spline wear, front axle kingpin wear, hydraulic system seal deterioration, exhaust manifold leaks. The manual will provide diagnostic procedures for these.
Electrical Gremlins:
Wiring harness degradation, faulty switch contacts, and battery terminal corrosion are common issues on older tractors. The manual's wiring diagrams are crucial for diagnosis.
📚 Vehicle History
Brand Heritage
Manufacturer:
Leyland Tractors, a significant British agricultural machinery manufacturer.
Model Evolution
Development Context:
Part of the Leyland 200/400 series, succeeding earlier models and representing a step forward in medium-horsepower tractors for agricultural use.
Production
Production Period:
Mid to late 1960s through the 1970s. Exact production years for 255/344 and 270/384 variants should be confirmed via serial number references in the manual or industry resources.
🏆 Awards & Recognition
Recognitions
Industry Standing:
Leyland tractors of this era were workhorses known for their robust construction and reliability, widely used in agricultural operations.
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