1940-1947 Harley-Davidson O.H.V. & Side Valve Engine Service Manual

Procedural Repository for 1940-1947 Harley-Davidson O.H.V. and Side Valve Engines—featuring technical insights for major component overhauls and electrical systems. Archive

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Document Details

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Document Number / Seller:
27742 / Ronald Reed
File Size:
14.62 MB
File Type:
PDF
Language:
English
Printable:
Yes
Category:
Motorcycle
Last updated / verified
Apr 13, 2025

Models Covered & Key Technical Specifications

Harley-Davidson O.H.V. & Side Valve Engine (Part No. 12022-44D) Manual: 1940-1947

Technical-Scope: Models // Technical-Benchmarks: O.H.V. / Side Valve Engine Logic // Technical-Scope: Advanced Maintenance Procedures.

Integrated-Framework Technical-Path Validation-Data
Repair Data Engine Overhaul Specification & Diagrams
System Overviews Electrical Systems Part Number Listings
Procedural Guides Fuel System Torque Specifications
Technical Specifications Ignition System Troubleshooting Assistance
Component Assemblies Lubrication System Maintenance Schedules

O.H.V. & Side Valve Engine Service Manual: Harley-Davidson 1940-1947 – Engine Repair Data Repository

Wiring diagrams are provided for complete electrical system understanding and troubleshooting.

Fuel system procedures are documented for carburetor adjustments and cleaning to ensure optimal performance.

Adjustment procedures are detailed for valve tappets, ignition timing, and clutch systems for precise operation.

Timing procedures are documented for both ignition and valve events for accurate engine performance.

Technical notes are provided for engine overhaul, assembly, and disassembly procedures.

This manual documents torque specifications for critical engine components to ensure proper bolt stretch prevention and secure assembly.

Professional Workshop Service Manual & Technical Specifications

Harley-Davidson 1940-1947 Engine Service Manual: O.H.V. & Side Valve Models

Technical-Scope: Engine Reassembly // Technical-Benchmarks: O.H.V. / Side Valve Engine Logic // Technical-Scope: Illustrated Procedures.

Integrated-Framework Technical-Path Validation-Data
Engine Overhaul Ignition & Electrical Part Identification
System Diagnostics Fuel & Lubrication Torque Values Included
Component Repair Transmission & Clutch Maintenance Intervals

Repair data is categorized into engine overhaul procedures, electrical system troubleshooting, and fuel/lubrication system maintenance. This manual covers both O.H.V. and Side Valve engine configurations from 1940 to 1947, offering detailed steps for disassembly, inspection, and reassembly of major components. It includes comprehensive illustrations and part number references essential for accurate repairs. The document also details specifications for carburetor adjustments, ignition timing, and clutch systems to ensure optimal engine performance and longevity. It provides guidance on routine maintenance schedules and troubleshooting common issues. This guide is an indispensable resource for maintaining Harley-Davidson engines from this era, emphasizing correct procedures to ensure reliability and performance. It details torque specifications for engine components to ensure proper bolt stretch prevention and secure assembly.

Wiring diagrams are provided for complete electrical system understanding and troubleshooting.

Fuel system procedures are documented for carburetor adjustments and cleaning to ensure optimal performance.

Adjustment procedures are detailed for valve tappets, ignition timing, and clutch systems for precise operation.

Timing procedures are documented for both ignition and valve events for accurate engine performance.

Technical notes are provided for engine overhaul, assembly, and disassembly procedures.

FAQ

What values are **calibrated** for the engine's system architecture? keyboard_arrow_down

Various specified values are detailed, including 1000 cc for the 61 Cu. In. O.H.V. engine and 1200 cc for the 74 Cu. In. O.H.V. engine, as found on page 3.

Assess the **applicable** tool requirements for engine disassembly. keyboard_arrow_down

Specific tools such as a Harley-Davidson special wrench (Part No. 12022-30) for removing push rods and a corresponding tool for the timing gear case are required, detailed on page 40.

What components require **exact** electrical values for troubleshooting? keyboard_arrow_down

Troubleshooting the generator system involves checking electrical values for the field coils and armature, as detailed on pages 97-103, which provide specific testing procedures.

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Reviews (5)

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This manual is a must-have for any Harley enthusiast. The troubleshooting charts are incredibly helpful!
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The support team was fantastic! They responded quickly to my questions. The manual covers everything you need for servicing. Fantastic purchase!
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Rated 5 out of 5 stars
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The download process was smooth and I received the link in no time. The manual is very detailed and easy to navigate.
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I love how thorough this guide is! The engine maintenance section saved me a lot of time and effort. Highly recommend!