🏷️ Basic Information Identification Make: Triumph Model: Herald Year: 1966 Variant: 1200 12-50 Codes Engine Code Type: Likely based on engine displacement and overhead valve configuration 👋 Introduction Market Position Target Audience: Enthusiasts, owners, and mechanics specializing in or working on classic British sports cars and saloons. Competitive Analysis Value Proposition: Provides comprehensive, dealership-level repair and maintenance information at a fraction of the cost of original manuals or professional labor. Key Features Ease Of Use: Numbered instructions, bold figure numbers, detailed illustrations, and a structured table of contents facilitate easy navigation and understanding. Accessibility: Instant download eliminates shipping costs and delays, making critical information readily available. 📋 Manual Details Coverage Areas Primary Coverage: Triumph Herald 1200 and 12-50 models Secondary Coverage: Applicable variants and potential sub-models within the 1966 model year Page Count Estimated Page Count: Detailed service manuals for this era often range from 300-600 pages, depending on the depth of coverage. Manual Type Type: Full Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, including cylinder head, block, pistons, crankshaft, camshaft, valve train, lubrication system, and cooling system. Fuel System: Carburetor (likely SU or Zenith-Stromberg) tuning, rebuilding, and fuel pump servicing. Ignition System: Distributor, coil, spark plugs, wiring, and timing adjustments. Transmission: Manual gearbox servicing, clutch replacement, and gearbox overhaul. Drivetrain: Driveshaft, universal joints, and rear axle servicing. Suspension: Front and rear suspension components, including kingpins, wishbones, springs, shock absorbers, and steering linkage. Steering: Steering column, steering rack, and wheel alignment. Brakes: Hydraulic brake system, including master cylinder, wheel cylinders, brake shoes, drums, and hydraulic lines. Electrical System: Wiring diagrams, dynamo/alternator charging system, starter motor, lighting, instrumentation, and accessories. Bodywork: Chassis, body panels, doors, hood, convertible top, and trim component repair and adjustment. Heating And Ventilation: Heater matrix, ducting, and airflow controls. Procedures Included Maintenance: Scheduled maintenance, lubrication points, fluid changes, and tune-up procedures. Troubleshooting: Diagnostic charts and procedures for common issues across all systems. Repair: Step-by-step repair instructions for all major components and systems. Rebuilding: Comprehensive instructions for complete engine and gearbox rebuilds. Refurbishment: Guidance on restoring worn or damaged components. Restoration: Detailed information suitable for full vehicle restoration projects. Electrical Diagnostics: Detailed wiring diagrams and fault finding procedures for electrical issues. Technical Depth Depth: Suitable for professional technicians and advanced DIY mechanics, covering everything from basic adjustments to full engine rebuilds. 📊 Manual Specifications File Format Format Details: PDF (Portable Document Format) for universal compatibility. Print Quality Printability: Full Printable - All pages can be printed on demand. Binding Type Binding Type: Digital (No physical binding, as it's a download). Paper Type Paper Type: N/A (Digital format). ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-cylinder, Overhead Valve (OHV) Displacement: 1200 cc (1.2 Liters) Bore X Stroke: Approximately 73.7 mm x 71.1 mm (2.90 in x 2.80 in) Performance Horsepower: Approximately 48-50 bhp (Brake Horsepower) at around 4500-4800 rpm. Torque: Approximately 67-70 lb-ft (89-95 Nm) at around 2500-3000 rpm. Fuel System Carburetor: Single SU HS2 or Zenith-Stromberg CD175 carburetor. Fuel Type: Leaded or Unleaded gasoline (depending on octane rating and engine tuning adjustments). Cooling System Cooling Method: Water-cooled, pressurized system with a radiator and fan. 🔧 Transmission Standard Transmission Type: 4-speed manual gearbox with optional overdrive on certain models. Optional Overdrive: Laycock de Normanville overdrive unit (often switch-operated). Features Clutch: Single dry plate clutch. 📐 Dimensions Exterior Wheelbase: Approximately 82 inches (2083 mm). Front Track: Approximately 48.75 inches (1238 mm). Rear Track: Approximately 48.5 inches (1232 mm). Weights Curb Weight: Approximately 1850 - 1950 lbs (840 - 885 kg), depending on body style and equipment. 🛡️ Safety Features Ratings Crash Safety: As a 1960s vehicle, it predates modern crash safety standards and testing protocols. No official ratings available. Active Features Braking System: Front disc brakes (often 9.5-inch Girling) and rear drum brakes. Passive Features Seatbelts: Likely optional or not fitted as standard in all configurations for the 1966 model year. The manual would detail installation if available. 💡 Technology Features Infotainment Radio: Optional aftermarket or period-correct radio. Manual may cover wiring for radio installation. Driver Assistance None: No electronic driver assistance systems were available on this model. Connectivity None: No factory connectivity features available. 🔧 Maintenance Service Intervals Oil Change: Typically every 3,000 miles or 6 months. Manual will specify exact interval and oil type. Grease Points: Regular lubrication of kingpins, suspension joints, and driveshaft U-joints is crucial. Manual will detail schedule and grease type. Fluid Specifications Engine Oil: Likely a multi-grade oil such as 20W-50 or 20W-30. Manual will provide exact specification and capacity. Coolant: Mixture of antifreeze and water. Manual will specify the correct ratio and type. Brake Fluid: DOT 3 or DOT 4 hydraulic brake fluid. Manual will specify type and capacity. Gearbox Oil: GL-4 Hypoid gear oil (e.g., SAE 90). Manual will specify...