🏷️ Basic Information Identification Make: Triumph Model: Herald Trim: 12/50 Production Years: 1959-1971 Codes Chassis Code: Standard Herald chassis with specific 12/50 upgrades Engine Code Prefix: Usually prefixed with 'GB-ENG' 👋 Introduction Market Position Target Audience: Owners and independent workshops performing maintenance and repair on the Triumph Herald 12/50 Competitive Analysis Value Proposition: Provides dealer-level information for DIY maintenance, saving time and money compared to professional servicing Key Features Uniqueness: Contains instructions for proprietary components, enabling a holistic understanding of vehicle performance Accuracy Statement: Endeavored to ensure accuracy, providing reliable information for repairs 📋 Manual Details Coverage Areas Main Coverage: Triumph Herald 12/50 Year Coverage: 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971 Page Count Page Count: 415 Manual Type Manual Type: Workshop Service Repair Manual Language Language: English Format File Format: PDF Print Quality Printability: Yes, printable Binding Type Binding Type: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) 📖 Manual Coverage Systems Covered Engine: Comprehensive engine repair, overhaul, tune-ups, lubrication, cooling system Fuel System: Carburetor tuning (likely SU or Zenith Stromberg), fuel pump, fuel lines, tank Ignition System: Distributor, coil, spark plugs, timing adjustments Transmission: Manual gearbox repair and overhaul, clutch system, driveshafts Brakes: Hydraulic system, brake shoes/pads, wheel cylinders/calipers, master cylinder, parking brake Suspension: Front and rear suspension components, springs, shock absorbers, bushings Steering: Steering column, steering rack/box, tie rods, linkages Electrical System: Wiring diagrams, generator/alternator, starter motor, lighting, instruments, battery Bodywork: Body panel removal and repair, doors, windows, trim, convertible top (if applicable) Heating And Ventilation: Heater matrix, fan, ducting Procedures Included Maintenance: Routine servicing, lubrication schedules, fluid changes, filter replacements Troubleshooting: Diagnostic procedures for common faults and symptoms Repair: Detailed step-by-step repair instructions for all major components Overhaul: Complete disassembly, inspection, and reassembly procedures for major assemblies like engine and transmission Installation: Instructions for removing and installing components Tune Ups: Specific procedures for engine tuning and performance adjustments Technical Depth Depth: Comprehensive, assuming general automotive knowledge; covers proprietary component manufacturer instructions ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-cylinder, OHV (Overhead Valve) Displacement: 1200cc (approx. 1.2 Litres) Performance Horsepower: Approximately 50-55 bhp (Brake Horsepower) for the 12/50 model Torque: Specific torque figures would be detailed in the manual Fuel System Carburetor: Likely a single or twin SU carburetors, specific model detailed in manual Fuel Type: Leaded or Unleaded petrol (depending on engine modifications or year) 🔧 Transmission Standard Transmission Type: 4-speed manual Optional Optional Transmission: Not commonly available for the 12/50, but some later models or modifications might exist Features Clutch: Single dry plate clutch 📐 Dimensions Exterior Body Styles: Saloon, Coupe, Convertible, Estate (Vanden Plas variant) Weights Kerb Weight: Approximately 850-900 kg (depending on body style) 🛡️ Safety Features Ratings Crash Safety: Designed for an era with less stringent safety regulations; manual will cover basic safety precautions for repair. Active Features Braking System: Hydraulic, typically front discs and rear drums on the 12/50 Passive Features Seatbelts: May have been optional or not fitted on earlier models; manual will address installation/adjustment if present. General Precautions Tool Usage: Emphasis on using correct tools, including torque wrenches, for safety and accuracy. 💡 Technology Features Infotainment Entertainment System: Basic radio (likely optional), mechanical gauges for speed, fuel, temperature, oil pressure. 🔧 Maintenance Service Intervals Oil Change: Typical interval of 3,000 miles or 6 months, as detailed in the manual Grease Points: Regular lubrication of kingpins, UJs, and steering joints is critical; intervals specified in manual Fluid Specifications Engine Oil: e.g., SAE 20W/50 or 10W/30 (depending on climate), manual will specify exact grade and API rating Coolant: Water/antifreeze mixture, specific ratio provided in manual Brake Fluid: DOT 3 or DOT 4, manual will specify Gearbox Oil: e.g., EP 90 gear oil, manual will specify type and quantity Known Issues Chassis Corrosion: Common on older vehicles with separate chassis, especially around suspension mounts and sills; manual will detail inspection points. Engine Oil Leaks: Can occur from crankshaft seals, valve cover gaskets, and oil sump gaskets; manual covers seal replacement. Carburetor Tuning: SU carburetors require periodic adjustment for optimal performance; manual provides tuning guides. Suspension Wear: Bushings and kingpins can wear, leading to imprecise handling; manual details inspection and replacement. 📚 Vehicle History Brand Heritage Manufacturer: Triumph Motor Company (part of British Leyland) Model Evolution Design Basis: Distinctive Michelotti-styled body on a separate chassis 12/50 Distinction: The '12/50' designation typically referred to the 1200cc engine with a higher state of tune (around 50 bhp) compared to base Herald models, often with twin carburetors and improved trim. Production Manufacturing Location: Coventry, England 🏆 Awards & Recognition Recognitions Historical Significance: The Triumph Herald was a popular model in its time, known for its distinctive styling and practicality, representing a significant part of British automotive history.