🏷️ Basic Information Identification Make: Triumph Model: TR4 Model Variant: TR4 Codes Chassis Code: CT/1 Engine Code Prefix: FC 👋 Introduction Market Position Vehicle Class: Classic British Sports Car Target Audience: Triumph TR4 owners, classic car enthusiasts, mechanics specializing in British sports cars. Competitive Analysis Competitors: MG MGB, Austin-Healey Sprite/Midget, Jaguar E-Type (higher end). Key Features Vehicle Strengths: Robust chassis, potent straight-six engine, enjoyable driving dynamics, distinctive styling. Manual Value Proposition: Essential resource for maintaining and repairing the TR4, enabling owners to preserve its originality and performance. 📋 Manual Details Coverage Areas Engine Systems: Engine overhaul, tuning, carburetor adjustment, ignition system, cooling system, lubrication system Transmission Systems: Gearbox overhaul, clutch operation, driveshaft and differential maintenance Chassis Systems: Suspension overhaul (front and rear), steering system, brake system (hydraulic and mechanical), wheel alignment Electrical Systems: Wiring diagrams, lighting, ignition, starter, dynamo/alternator, dashboard instruments, accessories Bodywork And Trim: Body panel repairs, interior trim, convertible top mechanism, glass replacement Page Count Estimated Pages: 300-400 (typical for comprehensive workshop manuals of this era) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF (assumed for modern digital reproduction) 📖 Manual Coverage Systems Covered Comprehensive Coverage: Engine, drivetrain, suspension, steering, brakes, electrical, fuel, cooling, exhaust, body, interior Procedures Included Maintenance And Tune Up: Regular servicing, lubrication, filter changes, ignition timing adjustment, carburetor tuning, valve clearance adjustment Troubleshooting And Diagnosis: Identification of common faults, diagnostic flowcharts, symptom-based troubleshooting for engine, electrical, and mechanical issues Rebuilding And Overhaul: Detailed step-by-step instructions for engine rebuild, gearbox rebuild, differential overhaul, brake system overhaul, carburetor rebuilding Adjustment And Calibration: Carburetor synchronization, brake adjustment, clutch adjustment, steering box adjustment Wiring And Electrical Repair: Detailed wiring diagrams, component testing, repair of electrical faults Technical Depth Depth: Comprehensive, covering everything from basic maintenance to full mechanical and electrical component overhauls and rebuilds. 📊 Manual Specifications File Format Digital Format Quality: High-resolution scans, searchable text (OCR'd if available), clear image reproduction of diagrams and illustrations. Print Quality Print Quality Standard: Professional quality printing, clear black and white line drawings and diagrams, legible text. Binding Type Binding Type Standard: Spiral-bound or perfect-bound (for printed versions), allowing for lay-flat use in a workshop environment. Paper Type Paper Type Standard: Durable, semi-gloss or matte paper stock to withstand workshop conditions. ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-cylinder, Overhead Valve (OHV) Displacement: 2138 cc (130.4 cu. in.) Bore X Stroke: 74.6 mm x 81.3 mm (2.94 in. x 3.20 in.) Compression Ratio: 8.5:1 (typical) Performance Horsepower Gross SAE: 105.5 bhp @ 4,750 rpm (approximate) Torque Gross SAE: 127.5 lb-ft @ 3,000 rpm (approximate) Fuel System Carburetors: 2 x SU HS6 Semi-Downdraft Carburetors Fuel Type: Leaded Gasoline (or equivalent modern unleaded with additive) Cooling System Cooling Type: Water-cooled, pressurized Lubrication System Oil Capacity: 7 pints (approx. 3.3 liters) Recommended Oil Viscosity: 20W-50 (e.g., Castrol Classic XL 20W-50) 🔧 Transmission Standard Transmission Type: 4-speed Manual with Laycock Overdrive (optional) Optional Overdrive Availability: Optional Laycock de Normanville overdrive (typically on 3rd and 4th gears) Features Clutch Type: Single dry plate, hydraulically operated Gear Ratios Manual: 3.45:1 (1st), 2.21:1 (2nd), 1.41:1 (3rd), 1.00:1 (4th) - may vary slightly by production date. Fluid Specification Gearbox Oil Type: EP 90 Gear Oil (API GL-4) Fluid Capacity Gearbox Oil Capacity: 3.5 pints (approx. 1.65 liters) 📐 Dimensions Exterior Length: 3,962 mm (156 in.) Width: 1,460 mm (57.5 in.) Height: 1,245 mm (49 in.) Wheelbase: 2,146 mm (84.5 in.) Front Track: 1,219 mm (48 in.) Rear Track: 1,207 mm (47.5 in.) Weights Kerb Weight: 977 kg (2,154 lbs) Gross Vehicle Weight: 1,270 kg (2,800 lbs) Wheels And Tires Standard Wheel Size: 15 inch Standard Tire Size: 5.90-15 (bias-ply) or 165-15 (radial, later options) Wheel Bolt Pattern: 4 x 4.5 inch (4 x 114.3 mm) Wheel Offset: ET25 (approximate) 🛡️ Safety Features Ratings Crash Safety Era: Pre-modern safety standards; designed in the late 1950s/early 1960s. Active Features Braking System: Front Disc Brakes (Girling), Rear Drum Brakes. Parking Brake: Mechanical, operating on rear wheels. Passive Features Seat Belts: Optional; typically lap belts were available. Windscreen: Laminated safety glass (optional on early models, standard on later ones). Roll Over Protection: None inherent to standard design; aftermarket roll bars often fitted by enthusiasts. 💡 Technology Features Infotainment Audio System: Optional push-button radio (e.g., Lucas, Motorola), typically mono speaker. Driver Assistance Nil: No modern driver assistance systems were available or standard. Connectivity Nil: No external connectivity features (e.g., Bluetooth, USB) were present. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000 miles (4,800 km) or 6 months, whichever comes first. Grease Points Interval: Every 1,000 miles (1,600 km) or before long journeys. Tune Up Interval: Annually or every 6,000 miles (9,600 km). Fluid Specifications Coolant Type: Water with anti-freeze/anti-corrosion additive (e.g., ethylene glycol based). Brake Fluid Type: DOT 3 or DOT 4 Hydraulic Brake Fluid (Glycol-based). Clutch...