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Triumph

Triumph Herald 1200 12-50 1959 Full Service Repair Manual

Triumph Herald 1200 12-50 1959 Full Service Repair Manual

$16.99
$16.99
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Vehicle data plateRef 449007
Brand
Triumph
Vehicle
Cars
Models covered
Herald, Herald 12-50, Herald 1200
Years
1959
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

What happens after you pay

  • Download link opens on the order page immediately
  • The same link is emailed to you — re-download any time
  • Open on phone, tablet or PC; print only the pages you need
  • Not sure it covers your model year? Ask us before you buy
🏷️ Basic Information
Identification
Make:
Triumph
Model:
Herald
Year:
1959
Variant:
1200 / 12-50
Codes
Chassis Code:
GC10001 onwards (initial production)
👋 Introduction
Market Position
Target Audience:
Professional Technicians, DIY Mechanics, Restoration Enthusiasts
Competitive Analysis
Value Proposition:
Provides exhaustive information for all repair, maintenance, and restoration needs, replicating professional technician resources.
Key Features
Ease Of Use:
Numbered instructions, detailed illustrations, easy-to-use table of contents, combined troubleshooting and wiring diagrams.
Delivery Method:
Instant Download, No Shipping Costs
📋 Manual Details
Coverage Areas
Primary Coverage:
Full Service, Repair, Maintenance, Rebuild, Refurbishment, Restoration
Page Count
Estimated Page Count:
N/A (Digital Download)
Manual Type
Type:
Full Service Repair Manual
Language
Language:
English
Format
Digital Format:
PDF
📖 Manual Coverage
Systems Covered
Engine:
Engine overhaul, tuning, fuel system, cooling system, lubrication system, ignition system
Transmission:
Gearbox overhaul, clutch, driveshafts
Chassis:
Frame, suspension (front and rear), steering system
Braking System:
Hydraulic system, brake drums, wheel cylinders, master cylinder, parking brake
Electrical System:
Wiring diagrams, lighting, ignition, charging system, starter motor, instrumentation
Bodywork:
Body shell, doors, windows, trim, convertible top mechanism (if applicable)
Fuel System:
Carburetor tuning and overhaul, fuel pump, fuel lines
Exhaust System:
Exhaust manifold, pipes, muffler
Procedures Included
Maintenance:
Scheduled maintenance, fluid changes, lubrication points, filter replacement
Repair:
Component replacement, adjustment procedures, detailed repair steps
Troubleshooting:
Diagnostic procedures for common and uncommon faults, electrical troubleshooting
Rebuild:
Complete engine rebuild, gearbox rebuild, brake system overhaul
Diagnostics:
Fault diagnosis for all major systems
Technical Depth
Depth:
Comprehensive from basic maintenance to full engine and gearbox rebuilds, including detailed electrical diagnostics.
📊 Manual Specifications
File Format
Format:
PDF
Print Quality
Printability:
Full Printable Pages
Binding Type
Binding:
Digital Download (Printable)
Paper Type
Paper Equivalent:
N/A (Digital)
Requirements
Software Requirements:
Adobe PDF Reader, WinRAR (for potential archiving)
Compatibility
Operating Systems:
All Versions of Windows & Mac
⚙️ Engine Specifications
Primary Engine
Engine Type:
Inline 4-cylinder, OHV (Overhead Valve)
Displacement Cc:
1200 cc
Bore X Stroke Mm:
Approx. 73.7 x 71.1 mm
Compression Ratio:
Approx. 8.5:1
Performance
Horsepower Bhp:
Approx. 38-42 bhp @ 4,000-4,500 rpm (depending on specific tuning/variant)
Torque Lb-Ft:
Approx. 65-70 lb-ft @ 2,000-2,500 rpm
Fuel System
Carburetor:
Single Stromberg CD175 or Zenith 36WAI
Fuel Type:
Leaded Petrol (Octane rating to be confirmed by manual)
Ignition System
Ignition Type:
Coil and Distributor
🔧 Transmission
Standard
Type:
4-Speed Manual
Optional
Overdrive:
Optional Laycock de Normanville overdrive on some models (likely 12-50 variant)
Features
Clutch:
Single dry plate, hydraulically operated
Gear Ratios:
Specific ratios detailed in manual
Fluid Requirements
Transmission Oil:
GL-4 Hypoid Gear Oil (Specific grade/viscosity detailed in manual, e.g., SAE 90)
📐 Dimensions
Exterior
Wheelbase Mm:
2032 mm (80 inches)
Overall Length Mm:
Approx. 3710 mm (146 inches)
Overall Width Mm:
Approx. 1524 mm (60 inches)
Overall Height Mm:
Approx. 1295 mm (51 inches) (Coupe), 1320 mm (52 inches) (Saloon)
Weights
Curb Weight Kg:
Approx. 800-850 kg (1760-1870 lbs)
Wheels Tires
Wheel Size:
13-inch
Tire Size:
Typically 5.20-13 or 5.50-13 (bias-ply)
Bolt Pattern:
4 x 101.6 mm (4 x 4 inch)
🛡️ Safety Features
Ratings
Crash Safety Era:
Designed to 1950s/early 1960s standards; lacks modern safety features.
Active Features
Brakes:
Hydraulic drum brakes on all wheels
Steering:
Rack and pinion steering
Passive Features
Seatbelts:
Optional/Not Standard in 1959 models
Windscreen:
Laminated safety glass (driver's side) often standard, check specific vehicle
💡 Technology Features
Infotainment
Audio System:
Provision for a dashboard-mounted radio, often aftermarket or period-correct accessory.
Driver Assistance
Features:
None by modern standards; basic instrumentation.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Typically every 3,000 miles or 6 months (manual will specify exact)
Tune Up Interval:
Recommended annually or every 6,000 miles
Fluid Specifications
Engine Oil Type:
API SF/SG or equivalent (Viscosity typically SAE 20W-50 or SAE 30; manual is definitive)
Coolant Type:
Water/Antifreeze mix (specific ratio and type detailed in manual)
Brake Fluid Type:
DOT 3 or DOT 4 Hydraulic Brake Fluid (manual will specify exact type)
Known Issues
Common Wear Items:
Bushings (suspension, steering), clutch components, ignition points, carburetor seals, brake system components.
Body Integrity:
Rust is a significant concern on body panels, chassis outriggers, and sills; thorough inspection recommended.
Electrical Reliability:
Older wiring can degrade; connectors can corrode. Maintenance of dynamo/alternator and regulator is crucial.
📚 Vehicle History
Brand Heritage
Manufacturer:
Standard-Triumph (later part of British Leyland)
Model Evolution
Introduction Year:
1959
Design Philosophy:
Designed by Giovanni Michelotti, known for its distinctive character and 'The Little Giant' positioning.
Variants Covered By Manual:
1200 (base) and 12-50 (higher specification, potentially with overdrive)
Production
Production Period:
1959-1971
🏆 Awards & Recognition
Recognitions
Market Perception:
Recognized for its distinctive styling and character, popular in classic car circles for restoration and enjoyment.

Delivery & file format

This is a digital PDF download, not a printed book. After payment the download link appears on your order confirmation page and is emailed to the address you entered. Files open in any PDF reader on phone, tablet or computer and can be printed.

Check the model year and engine before you buy

Manufacturers change procedures, wiring and part numbers between model years and engine options. If your VIN plate shows a year or engine code that is not listed on the data plate above, contact us with the model, year and VIN and we will confirm coverage before you order.

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