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Manual Coverage
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Specific Models Covered
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Leyland Eastern National Buss Glass Manual:
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Detailed coverage of every panel, including sizes and specifications.
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Leyland 255-270:
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Repair Operation Manual, Maintenance, Wiring, Operation, Workshop Service and Repair Book.
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Leyland 38Td 4-98Nt:
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Service Manual, Workshop Service and Repair Book, Maintenance, Wiring, Operation.
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Leyland 98Mm Engines:
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Service Manual, Workshop Service and Repair Book, Maintenance, Wiring, Operation.
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Leyland Daf 400:
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Automatic Transmission Service Manual, Workshop Service and Repair Book, Maintenance, Wiring, Operation.
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Leyland Ea 350 - 420- 440:
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Service Manual, Workshop Service and Repair Book, Maintenance, Wiring, Operation.
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Leyland National Ln 330:
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Parts Manual, 1980 Body Unit, Workshop Service and Repair Book, Maintenance, Wiring, Operation.
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Component Coverage
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Lucas Electrical Systems:
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Service and Parts Manual for Leyland Motors vehicles.
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Cav Pumps & Governors:
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Parts Manuals for Cav LEYLAND 0-600 NL6F75, Cav Sheet NL6G80 1, and Cav Simms SPE-M & SPGE-M Injection pumps and Governors for Leyland engines.
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Systems Covered
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Engine:
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Comprehensive service, repair, and parts information for various Leyland engine models including 98mm variants, 38TD_4-98NT, and specific pump types.
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Transmission:
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Dedicated service manual for Leyland Daf 400 Automatic Transmission, covering operation, maintenance, and repair.
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Electrical Systems:
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Detailed coverage of Lucas electrical systems and components used in Leyland vehicles, including wiring diagrams and parts.
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Body And Chassis:
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Specific manual for Leyland Eastern National Bus Glass, detailing every panel with sizes and specifications. Parts manual for Leyland National LN 330 Body Unit.
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Procedures Included
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Routine Maintenance:
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Scheduled maintenance tasks, fluid checks, lubrication points.
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Repair And Overhaul:
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Detailed step-by-step procedures for engine, transmission, and component repair and overhaul.
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Troubleshooting:
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Diagnostic procedures, fault finding guides, and corrective actions for common issues.
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Parts Identification And Replacement:
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Comprehensive parts lists and diagrams for identification and replacement of components.
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Wiring Diagrams:
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Inclusion of wiring diagrams for electrical system diagnosis and repair.
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Engine Rebuild:
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Detailed instructions for engine disassembly, inspection, component replacement, and reassembly.
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Transmission Overhaul:
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Step-by-step procedures for the overhaul of manual and automatic transmissions covered.
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Brake System Repair:
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Procedures for brake component inspection, repair, and fluid replacement.
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Cooling System Service:
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Maintenance and repair of radiators, water pumps, and thermostats.
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Fuel System Servicing:
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Maintenance and repair of fuel pumps, injectors, and filters.
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Electrical Troubleshooting:
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Systematic diagnosis of electrical faults using wiring diagrams and test procedures.
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Technical Depth
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Depth Level:
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Comprehensive workshop and service level, suitable for professional mechanics and experienced DIY enthusiasts.
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Diagnostic Procedures:
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Detailed diagnostic flowcharts and symptom-based troubleshooting guides for common mechanical and electrical faults.
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Tightening Torques:
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Specific torque values for critical fasteners in engine assembly, suspension, and other components.
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Clearances And Tolerances:
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Precise measurements for component clearances and tolerances during assembly and inspection (e.g., piston ring gap, bearing clearances).
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Special Tools:
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Identification and usage of specialized tools required for specific repair procedures.
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Calibration Procedures:
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Procedures for calibrating fuel injection pumps and governors.
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Manual Type
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Types Included:
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Service Manuals, Repair Manuals, Operation Manuals, Parts Manuals, Glass Manuals.
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Engine Specifications
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Primary Engine Variants
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Leyland 98Mm Engines:
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Details on naturally aspirated and possibly turbocharged variants. Common applications include agricultural tractors and light commercial vehicles. Typically 4-cylinder, inline configuration.
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Leyland 38Td 4-98Nt:
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Likely a 4-cylinder, naturally aspirated or turbocharged diesel engine. The 'TD' might indicate Turbo Diesel, and '4-98' refers to the bore and stroke, suggesting a 4.0-inch bore and 4.75-inch stroke (approx. 98mm x 120mm), totaling around 5.7 liters. 'NT' could refer to a specific model or configuration.
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Leyland Ea 350 - 420- 440:
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These are likely diesel engines with displacements of 350, 420, and 440 cubic inches, commonly found in buses and larger trucks. Exact configurations (cylinders, aspiration) would be detailed in the manual.
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Fuel System
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Injection Systems:
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Coverage includes Cav Simms SPE-M & SPGE-M injection pumps and governors, indicating mechanical fuel injection systems. Specific calibration and servicing procedures would be included.
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Performance
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General Power Output:
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Power outputs varied significantly based on engine model and application. For instance, 98mm engines might range from 40-80 HP, while larger EA series engines could be in the 100-150+ HP range. Specific figures are detailed within individual manuals.
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Torque Figures:
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Torque outputs would also vary widely. Early diesel engines often prioritized torque for hauling and towing capabilities. Specific Nm or lb-ft ratings are detailed in the respective engine service manuals.
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Maintenance
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Service Intervals
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General:
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Manuals typically detail recommended service intervals for oil changes, filter replacements, greasing, and component inspections based on mileage or operating hours.
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Fluid Specifications
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Engine Oil:
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Specific SAE viscosity grades and API service classifications for engine oils suitable for diesel and petrol engines (if applicable).
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Transmission Fluid:
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Recommended types and specifications for manual and automatic transmission fluids, including capacities.
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Coolant:
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Type of antifreeze and coolant mixture ratios required for engine cooling systems.
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Brake Fluid:
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DOT specifications for brake fluid.
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Known Issues
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General Vintage Vehicles:
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While specific known issues are detailed within the manuals, common concerns for vintage trucks and tractors often include wear on fuel injection systems, cooling system leaks, electrical gremlins, and chassis/body corrosion. The manuals provide the definitive guidance for diagnosis and repair.
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Filter Part Numbers
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Engine Oil Filter:
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Specific part numbers for oil filters (e.g., for 98mm or 4.98 engines) would be listed in the parts manuals.
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Fuel Filter:
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Specific part numbers for fuel filters relevant to the diesel injection systems covered.
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