This manual covers Harley-Davidson Knucklehead motorcycles produced between 1940 and 1947, including models with engine designations E, F, FL, EL, U, UL, UH, and ULH. The Knucklehead is a significant model in Harley-Davidson's history, renowned for its V-twin engine design and its position as a benchmark in American motorcycle engineering during its era. These air-cooled machines, powered by overhead valve V-twin engines ranging from 61 to 74 cubic inches, offered substantial torque and performance for their time, competing with other prominent manufacturers and establishing a lasting legacy in the vintage motorcycle community.
This comprehensive service and repair manual provides detailed guidance for the maintenance, troubleshooting, and overhaul of your Harley-Davidson Knucklehead. It covers essential systems including the engine, transmission, fuel, ignition, electrical, suspension, braking, and frame. Within its pages, you will find step-by-step repair procedures, diagnostic charts for common issues, technical specifications such as torque values and clearances, and information on specialized tools. This manual is an indispensable resource for owners and technicians seeking to preserve the performance and integrity of these iconic motorcycles.
1940-1947 HD Knucklehead
SERVICE & REPAIR MANUAL
With this manual, you will have instant access to the service/repair information when you need it. It is very easy to use, and provides you with all of the technical information- work procedures, part numbers, torque specs, exploded views, etc- you need to have when you are performing service/maintenance and repairs on your vehicle. You can view and print this manual on your desktop computer, laptop computer, or tablet.
1940-1947 HD Knucklehead
SERVICE & REPAIR MANUAL
With this manual, you will have instant access to the service/repair information when you need it. It is very easy to use, and provides you with all of the technical information- work procedures, part numbers, torque specs, exploded views, etc- you need to have when you are performing service/maintenance and repairs on your vehicle. You can view and print this manual on your desktop computer, laptop computer, or tablet.
