Harley-Davidson Knucklehead: A Timeless Icon of American Motorcycling

**Introduction** Unveiled in 1936, the Harley-Davidson Knucklehead was a groundbreaking motorcycle that revolutionized the industry and became an iconic symbol of American freedom and individuality. With its distinctive styling, advanced engineering, and unmatched performance, the Knucklehead left an enduring mark on the world of motorcycling.

**Design and Styling** The Knucklehead's most striking feature is its unique engine design, which earned it the nickname "Knucklehead" due to the resemblance of its rocker covers to human knuckles. The engine was a departure from the flathead design used in previous Harley-Davidson models, offering improved performance and reliability. The Knucklehead's overall design was sleek and muscular, with a low slung profile and a distinctive teardrop-shaped fuel tank. Its iconic styling has made it a timeless classic, instantly recognizable by motorcycle enthusiasts around the world.

**Engineering and Performance** The Knucklehead was powered by a 74 cubic inch (1,212 cc) V-twin engine with overhead valves, a radical departure from the side-valve engines used in previous models. This new design provided increased power and efficiency, giving the Knucklehead a top speed of over 100 mph. The engine was mated to a three-speed transmission and a chain drive, providing a smooth and responsive ride.

**Innovation and Technology** The Knucklehead was a testament to Harley-Davidson's commitment to innovation and technology. It was the first Harley-Davidson motorcycle to feature overhead valves, which allowed for more efficient combustion and improved performance. The Knucklehead also introduced the use of hydraulic tappets, which automatically adjusted valve clearance, reducing maintenance requirements. These advancements made the Knucklehead a more reliable and user-friendly motorcycle, appealing to a wider range of riders.

**Cultural Impact and Legacy** The Harley-Davidson Knucklehead has had a profound impact on American culture. It has been featured in countless movies, television shows, and music videos, becoming an iconic symbol of freedom and adventure. The Knucklehead has also been a popular choice for customizers and builders, who have transformed it into a wide range of styles, from classic to modern.

**Conclusion** The Harley-Davidson Knucklehead is a timeless motorcycle that has stood the test of time. Its distinctive styling, advanced engineering, and unmatched performance have made it an icon of American motorcycling. Whether ridden in stock form or customized to reflect the individuality of its owner, the Knucklehead remains a symbol of freedom, adventure, and the enduring spirit of American craftsmanship.

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Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 Workshop Service Manual for Repair PDF.

This PDF service manual contains 166 pages.

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This Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 service manual provides data, characteristics, instructions and methodology to perform repair interventions on the vehicle and its components.

This manual includes special notes, important points, service data, precautions, etc. that are needed for the maintenance, adjustments, service, removal and installation of vehicle components for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
The most detailed, comprehensive step by step procedures, explanations, and pictorial diagrams from bumper to bumper you will ever see for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.

Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 Service Repair Manual meets all your information needs to repair or make some adjustments to your Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 Service Repair Manual. This manual is intended as a handy, easy to read reference book for the mechanics and DIY persons. Comprehensive explanations of all installation, removal, disassembly, assembly, repair and check procedures are laid out with the individual steps in sequential order.

Detailed illustrations, exploded diagrams, drawings and photos guide you through every service repair procedure for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 Service Repair Manual.

Adjustment and repair operations include reference to Service tool numbers and the associated illustration depicts the tool for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947. Where usage is not obvious the tool is shown in use.

This Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 service manual can be viewed on any computer, as well as zoomed and printed.
This service manual has been specially prepared so that the explanation is very simple. It has been prepared so that if this manual is thoroughly read, even comparatively new personel can give satisfactory after services to the customers as well as disassemble and maintain the vehicle.

All service and repair instructions included for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
Always use the correct special service tools or equipment specified. Under no circumstances use makeshift tools or equipment since the use of substitutes may adversely affect safe operation.
Where accurate measurements are required, they can only be made using calibrated, precision instruments.
Providing that the service schedules are respected, the customers can be sure of obtaining the maximum satisfaction and best result from his car. This manual provides general descriptions for accomplishing service and repair work with tested, efective tehniques. Following them will help assure reliability.
Information on the construction and function are included. This part should be understood before proceeding with troubleshooting, disassembling and servicing. Information on the troubleshooting, servicing specification lists, tightening torque, checking and adjusting, disassembling and assembling and servicing which cover procedures, precautions, factory specifications and allowable limits.
Information in this manual for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 is divided into groups. These groups contain general information, diagnosis, testing, adjustments, removal, installation, disassembly, and assembly procedures for the systems and components. Appropiate service methods and correct repair procedures are esential for the safe, reliabe operation of all motor vehicles as well as the personal safety of the individual carrying out the work.

The illustrations in this manual are used to highlight the fundamental principles and procedures of basic interventions. They may not show exactly the Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 in your possession.

Adjustment and repair operations also include reference to wear limits for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947. Relevant data, useful assembly details all in this SERVICE MANUAL for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
In order to perform the work efficiently and to avoid costly mistakes, read the text and thoroughly familiarise yourself with procedures before starting work.
All work should be performed with great care and in a clean working area with adequate lighting.

Please peruse and utilize this manual for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 fully to ensurea complete repair work for satisfying you or your customers by keeping their vehicle in optimum condition.
All information, illustration and specifications contained in this manual are based on the latest product information avaiable at the time of publication approval. The specification, maintenance and other information for the components are included, and diagnostic information has also been added where necessary. These torque values are intended for use in service assembly and installation procedures using the correct OEM fasteners. When replacing fasteners, always use the same type (part number) fastener as removed.
This Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 book outlines procedures for servicing and repairing vehicles using safe, effective methods. The procedures contain many NOTES, CAUTIONS and WARNINGS which should be followed along with standard safety procedures to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.

To maximise the life of your Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947:
Accurately follow the maintenance requirements of the periodic maintenance chart in the service manual.
Do not allow problems to develop. Investigate unusual noises and changes in the riding characteristics of the Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947. Rectify all problems as soon as possible (immediately if safety related).
Use only genuine Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 parts as listed in the parts catalogue.
Follow the procedures in this manual carefully and completely. Do not take short cuts.
Keep complete records of all maintenance and repairs with dates and any new parts installed.
Use only approved lubricants, as specified, in the manual of the Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.

This manual for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 has been issued to provide you with technical information regarding the design, function, disassembly, adjusting work and troubleshooting on the components and model of the Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
The descriptions are brief but precise and are supported by photographs, notes, drawings and schematics, as well as exploded and sectional drawings. All this information is intended to simplify any necessary repair work which can be performed on Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
This manual also contains information about adjusting work and valuable reference data for such adjustment values.
For all maintenance and repair work on Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947, all accident prevention guidelines must be strictly observed. To perform all repairs listed in this manual, a complete set of standard tools, as well as the special tools and fixtures shown and listed are necessary.
No special emphasis is put on replacing sealing components as we assume that these items are replaced during any repair. Unless specific values are given, all threaded connections should be tightened according to the required tightening torques listed on torque charts.
When describing work, which can be dangerous, we have described the required safety measures in this manual and indicated them by special remarks DANGER, CAUTION or NOTE.

This Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 Service Service Repair Manual QUALITY manual is 100 percents COMPLETE and INTACT, no MISSING/CORRUPT pages/sections to freak you out!

This Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 Service manual is known in many names:
Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 Service service manual.
Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 Service repair manual.
Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 Service workshop manual.
Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 Service shop manual.

This manual for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 is designed primarily for use by trained technicians in a properly equipped workshop. However, it contains enough detail and basic information to make it useful to the owner who desires to perform his own basic maintenance and repair work. The work can only be carried out if the owner has the necessary hand and special service tools to complete the job.
A basic knowledge of mechanics, including the proper use of tools and workshop procedures is necessary in order to carry out maintenance and repair work, satisfactorily.


GENERAL TAGS FOR MOTORCYCLES:

SPECIFICATIONS for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
VEHICLE IDENTIFICATION NUMBER (V.I.N.) for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
WHEELS for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
FRONT WHEEL for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
REAR WHEEL for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
TIRES for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
FRONT BRAKE MASTER CYLINDER AND HAND LEVER for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
FRONT BRAKE LINE for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
FRONT BRAKE CALIPER for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
BRAKE PEDAL for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
REAR BRAKE MASTER CYLINDER for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
REAR BRAKE LINE for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
REAR BRAKE CALIPER for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
FENDERS for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
FRONT FORK for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
FORK CLAMPS: UPPER AND LOWER for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
STEERING HEAD BEARINGS for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
SWINGARM AND BRACE for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
FRAME for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
REAR SHOCK ABSORBER for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
THROTTLE CONTROL for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
CLUTCH CONTROL for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
HEADLAMP ASSEMBLY AND SUPPORT BRACKET for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
FOOTPEG, HEEL GUARD AND MOUNT for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
SPROCKET COVER for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
BELT GUARDS. for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
INTAKE COVER for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
SIDESTAND for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
SEAT LOCKS for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
ENGINE for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
ENGINE REMOVAL for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
ENGINE INSTALLATION for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
CYLINDER HEAD for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
CYLINDER AND PISTON for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
LUBRICATION SYSTEM for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
OIL RESERVOIR AND OIL HOSE ROUTING for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
OIL COOLER for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
OIL PRESSURE INDICATOR SWITCH for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
CRANKCASE BREATHING SYSTEM for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
OILING SYSTEM for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
OIL PUMP for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
HYDRAULIC LIFTERS for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
GEARCASE AND CAM GEARS for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
CRANKCASE for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
AIR CLEANER ASSEMBLY for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
ELECTRONIC CONTROL MODULE (ECM) for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
THROTTLE POSITION SENSOR (TPS) for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
IGNITION COIL for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
FUEL TANK for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
FUEL PUMP for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
THROTTLE BODY for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
EXHAUST SYSTEM for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
STARTER for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
IGNITION SYSTEM for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
IGNITION/HEADLAMP KEY SWITCH for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
SPARK PLUG CABLES for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
CHARGING SYSTEM for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
BATTERY CABLES for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
VOLTAGE REGULATOR for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
ALTERNATOR for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
TURN SIGNAL FLASHER, FRONT TURN SIGNALS, REAR TURN SIGNALS for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
HEADLIGHT, TAIL LAMP for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
MAIN FUSE AND FUSES for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.
WIRING DIAGRAMS for Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947.

AND MORE...

Harley Davidson Knucklehead 1940 1941 1942 1943 1944 1945 1946 1947 Workshop Service Manual for Repair.