🏷️ Basic Information Identification Make: Triumph Models Covered: TR2, TR3, TR3A, TR4 Model Years Covered: 1955-1965 Production Dates: 1953-1967 (cumulative for all models) 👋 Introduction Market Position Category: Classic British Sports Car Target Audience: Enthusiasts, restoration specialists, home mechanics, professional workshops. Competitive Analysis Competitors: MG T-series, Austin-Healey 3000, Alfa Romeo Giulietta Spider, Sunbeam Alpine. Key Features Ease Of Use: Step-by-step instructions, diagrams, and photos designed for clarity. Comprehensiveness: Covers all major mechanical, electrical, and body systems for four distinct models. Value Proposition: Enables owners to maintain, repair, and restore their classic Triumph sports cars effectively. 📋 Manual Details Coverage Areas Primary Coverage: Workshop Factory Service and Repair Additional Coverage: Wiring Diagrams Page Count Estimated Page Count: Extensive (typical workshop manuals for this era are 300-600+ pages) Manual Type Type: Workshop Manual / Factory Service Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Complete disassembly, inspection, assembly, tuning of all engine variants. Engine Electrical: Ignition system, starting system, charging system, fuel injection (if applicable on later models). Fuel System: Carburetor (Stromberg, SU) overhaul, fuel pump, fuel lines, tank. Cooling System: Radiator, water pump, thermostat, hoses, fan. Exhaust System: Manifolds, pipes, mufflers, hangers. Transmission Manual: Gearbox overhaul (Moss box), clutch assembly, shift linkages. Transmission Overdrive: Laycock de Normanville overdrive unit (if equipped) repair and operation. Drive Axle: Rear axle assembly, differential, half-shafts, bearings. Suspension Front: Independent front suspension, kingpins, bushings, springs, shock absorbers. Suspension Rear: Live rear axle, leaf springs, Panhard rod (TR4), shock absorbers. Steering System: Steering column, steering rack (TR4), steering arms, tie rods, universal joints. Braking System Front: Disc brakes (TR3 onwards), calipers, pads, fluid. Braking System Rear: Drum brakes, wheel cylinders, shoes, brake master cylinder, hydraulic lines. Electrical System Lighting: Headlights, taillights, turn signals, interior lighting. Electrical System Instruments: Dashboard instruments (speedometer, tachometer, oil pressure, ammeter, fuel gauge), senders. Electrical System Accessories: Wipers, horn, heater (if factory fitted). Body Chassis: Frame repair, body panel alignment, door, bonnet, boot adjustments. Interior: Seating, dashboard trim, carpeting, weather sealing. Wiring Diagrams: Detailed, model-specific wiring diagrams for electrical systems. Procedures Included Maintenance: Routine servicing, lubrication, filter changes, spark plug replacement. Troubleshooting: Diagnosis of common problems and symptoms. Repair: Step-by-step instructions for component repair and replacement. Overhaul: Complete rebuild procedures for major mechanical components (engine, gearbox, axles). Adjustment: Carburetor synchronization, valve clearance, brake adjustments, ignition timing. Installation: Guidance for fitting replacement parts or accessories. Technical Depth Depth: Comprehensive - suitable for major overhauls, engine rebuilds, and advanced diagnostics. Detail Level: Detailed exploded views, torque specifications, clearances, and schematics. 📊 Manual Specifications File Format Type: PDF Searchable: Likely searchable if digitally generated and OCR'd. Printable: Yes, PDF allows for printing. Print Quality Quality Description: Dependent on original source scan quality; should provide clear text and legible diagrams. Binding Type Type: N/A (Digital PDF) Paper Type Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Tr2/Tr3/Tr3A Engine: Standard Triumph SP series OHV Inline-4 Tr2 Displacement: 1991 cc (121.5 cu in) Tr3/Tr3A Displacement: 1991 cc (121.5 cu in) (early), 2138 cc (130.4 cu in) (later TR3A) Tr4 Displacement: 2138 cc (130.4 cu in) (Standard Triumph 'slant four' engine) Performance Tr2 Horsepower: Approx. 90 hp @ 4800 rpm Tr3/Tr3A Horsepower: Approx. 95-100 hp @ 5000 rpm (depending on specification) Tr4 Horsepower: Approx. 104 hp @ 4750 rpm Torque: Varies by engine, typically 115-135 lb-ft Fuel System Carburetion: Twin SU H6 or Stromberg CD carburetors (standard). Fuel Type: Leaded gasoline (recommended for originality, unleaded with appropriate octane booster or hardened valve seats). 🔧 Transmission Standard Tr2/Tr3/Tr3A: 4-speed manual synchromesh (synchro on 2nd, 3rd, 4th gears). Optional Laycock de Normanville overdrive on 3rd and 4th gears. Tr4: 4-speed manual synchromesh with closer ratios. Optional Laycock de Normanville overdrive on 3rd and 4th gears. Optional Overdrive: Laycock de Normanville (OD) unit available on most models. Features Gearbox Type: Moss gearbox (TR2-TR3A), later redesigned gearbox (TR4). 📐 Dimensions Exterior Wheelbase: TR2/TR3/TR3A: 83 inches (2108 mm); TR4: 88 inches (2235 mm) Overall Length: Varies by model, approx. 150-160 inches Overall Width: Varies by model, approx. 57-60 inches Weights Curb Weight: Approx. 2000-2300 lbs (907-1043 kg) Weight Distribution: Designed for near 50/50 balance 🛡️ Safety Features Ratings Crash Safety: ERA standards of the time; no formal crash test ratings as per modern standards. Active Features Brakes: Front disc brakes (from TR3 onwards), rear drum brakes. Effective for the era. Handling: Low center of gravity, independent front suspension contributes to predictable handling. Passive Features Seatbelts: Optional from factory, often retrofitted. Windscreen: Safety glass (tempered) fitted as standard from TR3 onwards; TR2 had split screens. Roll-up side curtains for weather protection. 💡 Technology Features Infotainment Audio System: Primarily optional push-button radios (e.g., Lucas, Motorola) or blanking plates. No integrated infotainment. Driver Assistance Features: None by modern standards. Focus on driver engagement and mechanical feedback. Connectivity Features: None. 🔧 Maintenance...