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Harley-davidson

HARLEY DAVIDSON KNUCKLEHEAD FLATHEAD Digital Workshop Repair Manual 1940-1947

HARLEY DAVIDSON KNUCKLEHEAD FLATHEAD Digital Workshop Repair Manual 1940-1947

$16.99
$16.99
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Vehicle data plateRef 263936
Brand
Harley-davidson
Vehicle
Motorcycle
Models covered
Engines, Flathead, Harley Davidson, Knucklehead
Years
1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947
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 โ€” 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
๐Ÿท๏ธ Basic Information
Identification
Make:
Harley-Davidson
Model:
Knucklehead
Model Variant:
Flathead
Year Range:
1940-1947
๐Ÿ‘‹ Introduction
Market Position
Target Audience:
Harley-Davidson owners, collectors, restorers, mechanics specializing in vintage motorcycles.
Competitive Analysis
Value Proposition:
Provides professional-level information at a fraction of the cost of dealership service or physical manual acquisition, enabling significant savings on service and repair.
Key Features
Content Breadth:
Covers all repair procedures from A-Z, offering a complete resource for vehicle upkeep and restoration.
Ease Of Use:
Designed for ease of use, allowing users to find information and print specific procedures without advanced computer skills.
Durability:
Digital format prevents wear and tear associated with traditional paper manuals.
๐Ÿ“‹ Manual Details
Coverage Areas
Primary Coverage:
Repair, Maintenance, Rebuild, Refurbish, Restoration
Diagnostic Coverage:
All diagnostic and repair procedures
Page Count
Estimated Page Count:
Extensive (exact count not specified, but implied to be comprehensive)
Manual Type
Type:
Digital Workshop Repair Manual
Language
Language:
English
Format
Format:
Digital (Downloadable, Viewable, Printable)
๐Ÿ“– Manual Coverage
Systems Covered
Engine:
Full engine overhaul, troubleshooting, tuning, component repair (e.g., cylinders, pistons, crankshaft, camshaft, valve train)
Fuel System:
Carburetor (e.g., Linkert), fuel lines, fuel tank, fuel pump (if applicable)
Ignition System:
Magneto, distributor (if applicable), spark plugs, wiring
Transmission:
Gearbox overhaul, clutch, primary drive, final drive, lubrication
Electrical System:
Wiring diagrams, lighting, charging system, battery, controls
Braking System:
Drum brake mechanisms, linkage, adjustments
Suspension System:
Front fork (e.g., Springer), rear suspension (if applicable), wheel bearings
Frame And Body:
Frame inspection, bodywork repairs, fenders, fuel tank mounting
Controls:
Handlebars, levers, pedals, cables
Procedures Included
Maintenance:
Routine service, lubrication, adjustments, filter changes, fluid changes
Troubleshooting:
Diagnostic flowcharts, common problem identification and solutions
Repair:
Component disassembly, assembly, replacement, and adjustment for all major systems
Rebuild:
Complete engine rebuild, gearbox rebuild, fork rebuild
Restoration:
Guidance for refurbishing and restoring original components
Technical Depth
Depth:
Comprehensive: From basic adjustments to full engine and transmission rebuilds, suitable for both enthusiasts and professional mechanics.
Visuals:
High-quality photos, illustrations, and diagrams
๐Ÿ“Š Manual Specifications
File Format
Compatibility:
Microsoft Windows (95, 98, 98SE, 2000, NT, ME, XP, Vista, 7) and all Mac computers
Accessibility:
Instant Download
Print Quality
Printability:
Fully printable for hard copy reference
Binding Type
Binding:
Digital (No physical binding)
Paper Type
Paper Type:
N/A (Digital Format)
โš™๏ธ Engine Specifications
Primary Engine
Engine Type:
Overhead Valve (OHV) V-Twin (Knucklehead), Flathead V-Twin (historically referred to in this context for the era's models, though 'Knucklehead' specifically denotes the OHV design)
Displacement:
Typically 61 cubic inches (1000cc) and 74 cubic inches (1200cc) for EL, FL models during this period.
Performance
Horsepower Range:
Approx. 30-40 HP depending on specific model and tuning (exact figures varied).
Torque Range:
Significant low-end torque characteristic of Harley-Davidson V-twins.
Fuel System
Carburetor Type:
Predominantly Linkert carburetors (e.g., M series, G series).
Fuel Octane Rating:
Leaded gasoline, octane rating appropriate for the era (likely 70-80 octane).
Engine Components
Cylinder Head Design:
OHV with pushrods and rocker arms (Knucklehead specific).
๐Ÿ”ง Transmission
Standard
Transmission Type:
4-speed constant mesh manual gearbox.
Clutch Type:
Dry multi-plate clutch, operated by foot pedal and hand lever.
Primary Drive:
Duplex chain drive from crankshaft to clutch basket.
Features
Gear Shifting:
Hand-clutch, foot-shift (left foot) operation.
Fluid Specifications
Transmission Oil Type:
Typically SAE 50 or SAE 60 gear oil; manual will specify exact type and viscosity.
๐Ÿ“ Dimensions
Exterior
Wheelbase:
Varies by model, typically around 58-60 inches.
Weights
Dry Weight:
Approximately 550-600 lbs, depending on model (EL vs. FL).
๐Ÿ›ก๏ธ Safety Features
Ratings
Safety Standard Era:
Pre-modern safety standards; focus on mechanical integrity.
Active Features
Braking System Type:
Drum brakes front and rear, mechanically actuated.
Passive Features
Lighting:
Headlight, taillight, brake light (operated by brake pedal).
๐Ÿ’ก Technology Features
Infotainment
Infotainment System:
N/A (Mechanical era; no electronic infotainment systems).
Driver Assistance
Driver Assistance Features:
N/A (Mechanical era; no electronic driver assistance).
Connectivity
Connectivity Features:
N/A (Mechanical era; no electronic connectivity).
๐Ÿ”ง Maintenance
Service Intervals
Oil Change Interval:
Typically every 1,000 to 2,000 miles; manual will provide precise intervals.
Grease Points:
Regular greasing of pivot points, wheel bearings, and steering head bearings required.
Fluid Specifications
Engine Oil Type:
Primarily mineral-based oils, often SAE 50 or SAE 60. The manual will specify the precise type and additive requirements (e.g., ZDDP).
Primary Chain Case Oil:
Similar to transmission oil, often SAE 50 or 60.
Brake Fluid:
N/A (Mechanical drum brakes, no hydraulic fluid required).
Fork Oil:
Specific grades of fork oil, as detailed in the manual, crucial for suspension performance.
Known Issues
Oil Leaks:
Common across vintage motorcycles; requires regular inspection and maintenance of seals and gaskets.
Carburetor Tuning:
Linkert carburetors can be finicky and require precise adjustment for optimal performance.
Valve Adjustments:
Regular valve lash adjustments are critical for engine health and performance.
Ignition Timing:
Proper ignition timing is essential and requires careful setting.
๐Ÿ“š Vehicle History
Brand Heritage
Brand Legacy:
Harley-Davidson, a legendary American motorcycle manufacturer with a rich history dating back to 1903.
Model Evolution
Knucklehead Introduction:
The Knucklehead OHV design was introduced in 1936, revolutionizing Harley-Davidson's engine technology.
Flathead Context:
While the 'Knucklehead' refers to the OHV engine, this manual also covers 'Flathead' models of the era, indicating a broader scope for V-twin engines used in this period.
Production
Manufacturing Location:
Milwaukee, Wisconsin, USA.
Historical Significance:
These models represent a critical period in Harley-Davidson's development, bridging pre-war and post-war eras, and are highly sought after by collectors.
๐Ÿ† Awards & Recognition
Recognitions
Historical Model Recognition:
The Knucklehead is widely recognized as one of Harley-Davidson's most iconic and desirable pre-war/post-war models, a cornerstone of motorcycle collecting.

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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