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Norton 850 Commando Mark 3 Workshop Manual 1975 Onwards

$16.99
$16.99
This manual covers the 850 Commando Mark 3, produced from 1975 onwards. As an iconic British motorcycle, the Commando is renowned for its performance and engineering. The Mark 3 variant...
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Type: Motorcycle
Vendor:
Norton
Sku: 122875
Tags: 1975 850 Commando Mark 3 Commando Motorcycle Motorcycles Norton
Norton 850 Commando Mark 3 Workshop Manual 1975 Onwards
This manual covers the 850 Commando Mark 3, produced from 1975 onwards. As an iconic British motorcycle, the Commando is renowned for its performance and engineering. The Mark 3 variant introduced key advancements such as electric start, an improved oil-in-frame chassis, and a standard front disc brake, solidifying its status as a sought-after classic. This workshop manual provides factory-level detail essential for understanding and maintaining this celebrated machine. This comprehensive workshop and service repair manual is designed for 850 Commando Mark 3 owners and technicians. It offers A-Z repair coverage, including detailed procedures for engine overhaul, transmission service, brake systems, electrical systems, and much more. With hundreds of illustrations, diagrams, and wiring schematics, this manual provides step-by-step instructions and technician-level diagnostic information, making it an indispensable resource for maintaining and repairing your vehicle to factory standards.
🏷️ Basic Information
Identification
Make:
Norton
Model:
850 Commando
Generation:
Mark 3
Production Years Covered:
1975 onwards
Codes
Vin Decoder Information:
Not explicitly stated, but implied through factory detail
👋 Introduction
Market Position
Target Audience:
Norton 850 Commando Mark 3 owners and technicians
Value Proposition:
Enables DIY repairs, saving money and providing factory-level knowledge.
Competitive Analysis
Differentiation:
Vehicle-specific, factory-level detail, not generic information.
Key Features
Key Selling Point:
Instant download for immediate access.
Technical Resource Comparison:
Equivalent to manuals used by dealership technicians.
📋 Manual Details
Coverage Areas
All Models Covered:
Yes
Repair Scope:
A-Z (all repairs)
Page Count
Page Count:
Not specified, but described as 'factory highly detailed' and 'hundreds of illustrations'
Manual Type
Manual Type:
Workshop Manual / Service Repair Manual
Language
Language:
English
Format
File Format:
PDF
Delivery Method:
Instant Download
Compatibility:
Windows (7, Vista 32/64, XP, ME, 98, NT, 2000), Mac OS
Software Requirements:
Adobe PDF Reader
📖 Manual Coverage
Systems Covered
Engine Overhaul:
Yes
Clutch Service:
Yes
Brake System:
Yes
Sunroof Service:
Yes
Chain Maintenance:
Yes (removal and tightening)
Timing Belt Service:
Yes (replacement and procedures)
Wiring Systems:
Yes (schematics included)
Engine Performance:
Yes
Front End And Alignment:
Yes (procedures and specifications)
Suspension System:
Yes
Transmission Service:
Yes (removal, installation, in-car servicing)
Air Conditioning Service:
Yes (service and capacities)
U Joint And Cv Joint Service:
Yes
Vacuum Systems:
Yes (vacuum diagrams included)
Procedures Included
Diagnostic Trouble Codes:
Yes
Troubleshooting:
Yes
Diagnostic Charts:
Yes (computer diagnostic trouble tree charts)
Firing Orders:
Yes
Maintenance Schedules:
Yes (factory maintenance schedules and charts)
Serpentine Belt Routings:
Yes (with diagrams)
Brake Servicing:
Yes
Driving Concerns:
Yes
General Repair Procedures:
Yes (step-by-step instructions)
Technical Depth
Detail Level:
Factory High Detail
Instruction Format:
Step-by-step instructions
Visual Aids:
Diagrams, Illustrations, Wiring Schematics
Diagnostic Approach:
Technician-level
Completeness Statement:
The only service repair workshop manual you will ever need.
📊 Manual Specifications
File Format
PDF Quality:
High Quality, Printable, Zoomable Images
Searchability:
Implied by PDF format, facilitating easy text searching of technical information.
Print Quality
Printability:
All pages printable
Image Enhancement:
Ability to blow up images for enlarged copies
Binding Type
Binding Type:
N/A (Digital Download)
Paper Type
Paper Type:
N/A (Digital Download)
⚙️ Engine Specifications
Primary Engine
Engine Type:
Parallel-Twin (Air-cooled)
Displacement:
828 cc (50.5 cubic inches)
Bore X Stroke:
77 mm x 89 mm (approximate, check manual for precise figures)
Compression Ratio:
Typically 8.2:1 or 9.0:1 depending on variant (check manual)
Power Output:
Approximately 50-55 bhp (check manual for specific figures)
Torque Output:
Approximately 47-50 lb-ft (check manual for specific figures)
Performance
Top Speed:
Approx. 110 mph (177 km/h)
Fuel System
Carburetion:
Twin Amal Mk2 Concentric Carburetors (typically 32mm or 34mm)
Fuel Type:
Unleaded gasoline (check manual for octane rating recommendations)
Engine Components
Valve Train:
Overhead Valves (OHV), Pushrod Actuated
Ignition System:
Electronic Ignition (e.g., Boyer Bransden, Lucas electronic)
Lubrication System:
Wet Sump
Oil Capacity:
Approximately 4 Imperial pints (2.27 liters) - consult manual for exact figure and type.
🔧 Transmission
Standard
Transmission Type:
5-speed Constant Mesh Gearbox (Integrated with Engine/Clutch Unit)
Optional
Optional Transmissions:
N/A
Features
Clutch Type:
Wet Multi-plate
Gear Ratios:
Specific ratios covered in manual
Final Drive:
Chain Drive
Transmission Oil Type:
Refer to manual for specific API GL specification and viscosity.
📐 Dimensions
Exterior
Wheelbase:
Approx. 56.5 inches (1435 mm)
Length:
Approx. 84 inches (2134 mm)
Weights
Dry Weight:
Approx. 400-430 lbs (181-195 kg)
Fuel Tank Capacity:
Approx. 3.5 Imperial Gallons (15.9 Liters)
Oil Tank Capacity:
Separate oil tank, capacity specified in manual.
🛡️ Safety Features
Ratings
Crash Test Results:
N/A (Vintage Motorcycle)
Active Features
Braking System:
Front Disc Brake (often with dual discs on later models), Rear Drum Brake
Suspension Front:
Telescopic Forks (leading axle design)
Suspension Rear:
Swingarm with Dual Shock Absorbers
Passive Features
Lighting System:
Headlight, Taillight, Turn Signals (coverage in wiring diagrams)
💡 Technology Features
Infotainment
Infotainment System:
N/A (Vintage Motorcycle)
Driver Assistance
Driver Assistance Features:
N/A (Vintage Motorcycle)
Connectivity
Connectivity Features:
N/A (Vintage Motorcycle)
Electrical System
Charging System:
Alternator and Rectifier/Regulator (specific types covered in manual)
Battery Type:
12V Lead-Acid (specific capacity and type detailed in manual)
🔧 Maintenance
Service Intervals
Oil Change Interval:
Refer to manual; typically every 2,000-3,000 miles or annually.
Tune Up Interval:
Refer to manual; typically involves spark plug check, carburetor adjustment, chain adjustment, brake adjustment.
Fluid Specifications
Engine Oil Type:
Refer to manual for recommended SAE viscosity (e.g., 20W-50) and API rating.
Brake Fluid Type:
DOT 3 or DOT 4 recommended for disc brake systems (verify with manual).
Transmission Oil Type:
Refer to manual for specific grade and API classification (e.g., GL-4).
Known Issues
Common Wear Items:
Clutch plates, primary chain, gearbox components, electrical connections, suspension seals.
Typical Problems Addressed By Manual:
Engine oil leaks, carburetor tuning, transmission shifting issues, electrical faults, brake performance.
📚 Vehicle History
Brand Heritage
Manufacturer Origin:
United Kingdom
Brand Legacy:
Iconic British motorcycle manufacturer known for performance and innovation.
Model Evolution
Commando Development:
Evolved from earlier Commando models, incorporating frame improvements and electric start.
Mark 3 Distinguishing Features:
Electric Start, improved frame geometry (oil-in-frame), standard disc front brake, and typically the 5-speed gearbox.
Production
Production Period:
Norton Commando production ran from 1967 to 1977, with Mark 3 covering the latter part of this.
Manufacturing Location:
Initially Wolverhampton, later moved to other UK locations.
🏆 Awards & Recognition
Recognitions
Bike Magazine Reviews:
Widely praised in its era for performance and handling; often cited as a benchmark.
Restoration Community Status:
Highly regarded and sought-after by classic motorcycle enthusiasts and restorers.
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