🏷️ Basic Information

Make:

Triumph

Model:

Herald

Model Variants:

1200, 12-50

Production Years Covered:

1959-1971

Chassis Codes:

Not specified in product information, typically H1000 onwards

👋 Introduction

Vehicle Segment:

Compact/Small family car, known for its unique styling and good handling.

Key Competitors:

Ford Anglia, Morris Minor, Austin A40 Farina, Hillman Imp.

Unique Selling Points:

Innovative monocoque construction for its era, spacious interior for its size, distinctive styling, robust engineering.

Body Styles:

Available as a 2-door saloon, 4-door saloon, convertible, and estate (Herald Courier van).

📋 Manual Details

Coverage Scope:

Comprehensive repair and service for Triumph Herald 1200 and 12-50 models.

Page Count:

Not explicitly stated, but implied to be comprehensive as a factory equivalent.

Manual Type:

Repair Service Manual / Workshop Manual

Manual Purpose:

Aids in the maintenance, diagnosis, and repair of the Triumph Herald, suitable for both novice and experienced mechanics.

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine And Drivetrain:

Engine overhaul, tuning, cooling system, fuel system (carburettors), exhaust system, clutch, gearbox, drive shafts.

Chassis And Suspension:

Front and rear suspension, steering system, chassis frame, body mounting, lubrication.

Braking System:

Front and rear drum brakes (later models may have front discs), hydraulic system, brake adjustment, fluid specifications.

Electrical System:

Ignition system, lighting, charging system (generator/alternator), starter motor, wiring diagrams, instrument cluster.

Bodywork And Trim:

Body panel removal/installation, door mechanisms, window mechanisms, interior trim, seals, weatherstripping.

Maintenance Procedures:

Scheduled maintenance, lubrication points, fluid changes, filter replacements, tune-up procedures.

Repair Procedures:

Step-by-step instructions for disassembly, cleaning, inspection, repair, and reassembly of all major components.

Troubleshooting Guides:

Diagnostic procedures for common problems, fault finding charts.

Engine Rebuild:

Detailed procedures for complete engine disassembly, inspection of cylinder head, block, crankshaft, camshaft, pistons, and reassembly with specified tolerances and torque settings.

Transmission Overhaul:

Instructions for gearbox and overdrive unit removal, dismantling, component inspection, and reassembly, including gear ratios and bearing preloads.

Suspension And Steering Repair:

Guidance on replacing king pins, trunnions, bushings, shock absorbers, and steering rack/box components.

Body And Paint Repairs:

Information on jacking points, chassis strengthening, and common repair areas for bodywork.

Depth Of Information:

Detailed technical specifications, tolerances, torque values, and schematics suitable for professional technicians and skilled DIY enthusiasts.

Wiring Diagrams:

Includes comprehensive electrical schematics for all vehicle systems.

Torque Specifications:

Detailed torque values for critical fasteners across all mechanical systems.

Part Identification:

Often includes diagrams and part numbers for identification and ordering.

📊 Manual Specifications

File Format:

PDF

Print Quality:

Full Printable

Zoom In Out:

YES

Software Requirements:

Adobe PDF Reader, WinZip (or equivalent for unzipping)

Operating System Compatibility:

All Versions of Windows & Mac

Delivery:

Instant Download

⚙️ Engine Specifications

Engine Type:

Inline 4-cylinder, OHV (Overhead Valve)

Displacement:

1200cc (1.2 Litre) - specifically 1296cc for later models, but the manual covers the 1200cc designation.

Horsepower 1200:

Approx. 38-40 bhp (net) at 4200 rpm for the 1200 model.

Horsepower 12-50:

Approx. 45-48 bhp (net) at 4750 rpm for the 12-50 model (higher compression, twin carbs).

Torque:

Approx. 64-67 lb-ft at 2500 rpm for the 1200 model.

Carburetion:

Single Zenith Stromberg (or Solex) downdraft carburettor for 1200; Twin Zenith Stromberg (or SU) for 12-50 variant.

🔧 Transmission

Transmission Type:

4-speed manual synchromesh gearbox (on all forward gears from late 1960).

Overdrive:

Optional Laycock de Normanville overdrive available on some models (usually 4th gear).

Clutch Type:

Single dry plate, hydraulically operated clutch.

📐 Dimensions

Wheelbase:

Approximately 82 inches (2083 mm)

Length:

Approximately 150 inches (3810 mm)

Width:

Approximately 59 inches (1499 mm)

Height:

Approximately 51 inches (1295 mm)

Curb Weight:

Approx. 1700-1850 lbs (770-840 kg) depending on body style and equipment.

🛡️ Safety Features

Crash Safety Era:

Designed in an era before stringent modern crash testing; features a robust chassis but lacks modern safety crumple zones.

Braking System Type:

Hydraulic drum brakes on all wheels for most of the production run. Front discs were introduced on some later variants.

Seatbelts:

Not standard on early models; became available as an option or standard on later versions.

Body Construction:

Monocoque construction offering reasonable rigidity for its time.

💡 Technology Features

Radio System:

Optional factory or dealer-fitted radios, typically AM band.

Driver Aid Features:

None by modern standards; basic instrumentation and mechanical controls.

Connectivity Options:

Not applicable.

🔧 Maintenance

Oil Change Interval:

Typically every 3,000 miles or 6 months.

Grease Points Interval:

Regular lubrication of king pins, shackle pins, and other chassis points every 1,000-3,000 miles.

Engine Oil Grade:

SAE 20W/50 or 10W/30 depending on climate and engine condition (refer to manual for specific recommendations).

Coolant Type:

Water with anti-freeze (glycol-based) in appropriate mixture.

Brake Fluid Type:

DOT 3 or DOT 4 (glycol-based) hydraulic brake fluid.

Gearbox Oil Type:

API GL-4, SAE 90 EP (Extreme Pressure) gear oil.

Rust Susceptibility:

Prone to corrosion in sills, wheel arches, floor pans, and door bottoms due to age and materials.

Engine Wear:

Potential for worn valve guides, piston rings, and bearings, particularly on higher mileage or poorly maintained engines.

Electrical Gremlins:

Older wiring harnesses can degrade, leading to intermittent electrical faults.

Suspension Wear:

King pins, trunnions, and bushings in the suspension and steering can wear, leading to looseness and poor handling.

📚 Vehicle History

Manufacturer Origin:

United Kingdom

Key Development Points:

Launched in 1959, it featured independent front suspension and a monocoque body. Engine capacity increased from 997cc to 1200cc, and later to 1296cc. The 12-50 variant offered improved performance with twin carburetors.

Production Period:

1959 - 1971

Assembly Locations:

Coventry, England