🏷️ Basic Information Identification Make: Triumph Model: TR4 Year Range: 1961-1965 Product Name: Triumph TR4 1961-1965 Workshop Service Repair Manual Codes Engine Code Reference: TR4 2138cc 4-cylinder inline 👋 Introduction Market Position Target Audience: Triumph TR4 owners, enthusiasts, and mechanics (DIY and professional) Key Features Value Proposition: Inexpensive way to maintain and repair the vehicle, provides factory-level detail for accurate service. Source Credibility: Factory manual used by experienced mechanics worldwide. 📋 Manual Details Coverage Areas Primary Coverage: Workshop Service Repair Included Manuals: Owner's Manual Page Count Estimated Page Count: Refer to physical manual or high-quality scan reproduction. Typically 200-400 pages for comprehensive workshop manuals of this era. Manual Type Type: Factory Workshop Service Manual Language Language: English Format Format: PDF (Digital) 📖 Manual Coverage Systems Covered Powertrain: Engine, Cooling System, Fuel System, Exhaust System, Clutch System, Gearbox System, Overdrive System, Propeller Shaft, Rear Axle System Chassis: Suspension System, Steering System, Brakes System, Wheels & Tyres, Chassis Frame & Body Electrical: Electrical System, Battery System, Generator System, Starter Motor, Ignition System, Wiring Harness Ancillary Systems: MOT-A-VAC Unit, Dust & Water Sealing Procedures Included General Maintenance: Routine checks, lubrication, fluid changes, filter replacements Engine Overhaul: Engine disassembly, inspection, repair, reassembly, tuning Transmission & Drivetrain: Gearbox servicing, overdrive unit repair, differential maintenance Brake & Suspension: Brake system overhaul (including master cylinder, wheel cylinders), suspension component replacement, steering linkage adjustment Electrical Diagnosis & Repair: Wiring diagrams, component testing, troubleshooting ignition, charging, and starting systems Bodywork & Chassis: Frame inspection, sealing procedures, basic body adjustments Diagnostic Information: Troubleshooting guides for common issues Troubleshooting: Specific sections dedicated to identifying and resolving common faults across all major systems. Torque Specifications: Detailed tightening torque values for all critical fasteners across engine, chassis, and body components. Special Tools: Identification and usage of specialized tools required for specific repair and maintenance tasks. Technical Depth Depth: Comprehensive, covering routine maintenance to full engine and component rebuilds. Includes detailed diagrams and specifications for professional and DIY use. 📊 Manual Specifications File Format Digital Format: PDF File Size: 30 MB Print Quality Printability: Printable page by page Illustration Quality: Detailed illustrations, diagrams, and pictures Binding Type Binding: Not applicable (Digital PDF) Paper Type Paper Type: Not applicable (Digital PDF) Software Requirements Reader Requirement: Adobe Acrobat Reader (Free download from Adobe) Extraction Requirement: WinZip or WinRAR (Free download available) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-Cylinder Engine Displacement: 2138 cc Engine Family: Standard Triumph OHV inline-four (derived from the Standard Vanguard engine) Performance Estimated Horsepower: 105 bhp @ 4750 rpm (for early models, may vary slightly) Estimated Torque: 137 lb-ft @ 3000 rpm (for early models, may vary slightly) Fuel System Carburetion: Typically twin SU carburetors (e.g., HS4 or HV type) Fuel Type: Premium Unleaded Gasoline (though originally designed for leaded fuel, conversion may be necessary/recommended for modern fuels) Lubrication Oil Capacity Quarts: Approximately 6 US quarts (5.7 liters) with filter. Consult manual for precise capacity. Cooling System Cooling Type: Water-cooled 🔧 Transmission Standard Transmission Type: 4-speed manual Optional Overdrive: Optional Laycock de Normanville overdrive (typically on 3rd and 4th gears, electrically engaged) Features Gearbox Details: Synchromesh on all forward gears. Fluid Type Gearbox Oil: Refer to manual for specific API GL-4 specification oil, typically SAE 90 or 80W-90. Overdrive Fluid: Specific fluid requirements for overdrive unit, usually ATF (Automatic Transmission Fluid) or specialized overdrive fluid. Consult manual. 📐 Dimensions Exterior Wheelbase Inches: Approx. 88 inches (2235 mm) Overall Length Inches: Approx. 157 inches (3988 mm) Overall Width Inches: Approx. 57 inches (1448 mm) Overall Height Inches: Approx. 50 inches (1270 mm) (hardtop) Weights Curb Weight Lbs: Approx. 2175 lbs (986 kg) Gross Vehicle Weight Rating Lbs: Refer to vehicle's compliance plate or manual. 🛡️ Safety Features Ratings Safety Standards: Designed to 1960s safety standards. Lacks modern safety features. Active Features Brakes: Front Disc Brakes (Dunlop), Rear Drum Brakes. Disc brakes were a significant safety upgrade for the era. Steering: Rack and pinion steering. Passive Features Seat Belts: Optional or dealer-fitted in early production. Check for fitment and type. Crumple Zones: Minimal to non-existent by modern standards. 💡 Technology Features Infotainment Audio System: Typically a basic AM radio, often dealer-fitted. No modern infotainment features. Driver Assistance Assistance Systems: None by modern definition. Focus is on mechanical systems. Connectivity Connectivity Options: None. 🔧 Maintenance Service Intervals Oil Change Interval Miles: Typically every 3,000 miles or 6 months, but consult manual for precise recommendations. Grease Points: Requires regular greasing of various chassis components (kingpins, universal joints, steering joints). Intervals typically 1,000-3,000 miles. Fluid Specifications Coolant: Ethylene glycol-based antifreeze/coolant mixture. Consult manual for specific ratio and type. Brake Fluid: DOT 3 or DOT 4 brake fluid. It is critical to use the correct type for the system. Known Issues Chassis Corrosion: Common issue with classic British sports cars, particularly in sills, wheel arches, and around...