1940-1958 Harley-Davidson Servi-Car & 45 SV Service Manual

Expert guide for Harley-Davidson Servi-Car & 45 SV covering engine, clutch, transmission, and electrical systems. Includes part numbers like 12731-29.

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Harley-Davidson Models Covered & Key Technical Specifications

Models: Harley-Davidson Servi-Car, Harley-Davidson 45 SV
Build Years: 1940–1958
Technical Data:

  • Engine type: 45-degree V-type, 2-cylinder
  • Horsepower: 21 HP at 4400 R.P.M.
  • Piston displacement: 45.28 cu. in. (742 cc)
  • Compression ratio: 4.75 to 1
  • Transmission type: 3-speed forward, 1-speed reverse constant mesh
  • Fuel tank capacity: 3.4 U.S. gallons
  • Ignition circuit breaker gap: 0.022 inch
Technical Specifications
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Document Number / Seller:
27746 / Sandra Ramirez
File Size:
27.39 MB
File Type:
PDF
Language:
English
Pages:
82
Printable:
Yes
Category:
Motorcycle
Last updated / verified
Sep 3, 2025

Harley-Davidson Manual Features & Content Preview

Inside the 1940–1958 Harley-Davidson Servi-Car & 45 SV Service Manual

  • Covers 1940–1958 Harley-Davidson Servi-Car and 45 SV motorcycles, documenting factory engine, drivetrain, chassis, and electrical specifications for the V-type side valve configuration
  • Third-party publication © 1986 Antique Cycle Supply Inc.
  • Contains 60+ technical diagrams, including exploded-view assemblies for the engine, transmission, and differential housing
  • 82 pages of technical reference content
  • Delivered as a direct download the moment payment clears
  • Indexed PDF search covers every chapter and appendix
  • This 1986 edition provides the reference standard for the 1940–1958 Harley-Davidson Servi-Car and 45 SV series, documenting factory-recommended tolerances and maintenance intervals often missing from general enthusiast guides

Component and System Documentation

The 1940–1958 Harley-Davidson Servi-Car & 45 SV service manual documents the technical operation and maintenance of these historic American motorcycles. Chapters detail the complete teardown and assembly of the 45-degree V-type engine, including valve guides, tappets, and piston fitting, alongside detailed lubrication schedules for the engine oil, transmission oil, and chain oilers.

The 1940–1958 Harley-Davidson Servi-Car & 45 SV publication also provides exploded-view diagrams for the three-speed constant mesh transmission and the Servi-Car differential assembly. Sections on the electrical system include wiring diagrams and generator testing procedures, while the chassis section outlines fork alignment, steering damper assembly, and hydraulic brake system maintenance. To understand how factory workshop documentation is structured, refer to the provided technical indexes.

Specification Highlights

Technical data within the 1940–1958 Harley-Davidson Servi-Car & 45 SV service manual provides essential clearance and torque values. Mainshaft endplay is documented at 0.003 to 0.005 inches. Piston-cylinder clearance is specified at 0.001 to 0.002 inches on standard V-type components. Fuel capacity for the 1940–1958 Harley-Davidson Servi-Car is documented at 3.4 U.S. gallons. Reference only — always consult a certified technician before performing service on this equipment. An official reproduction 82-page workshop manual covering the 1940–1958 Harley-Davidson Servi-Car and 45 SV, documenting engine, chassis, transmission, and differential specifications for these classic V-twin motorcycles.

Manual FAQ, Purchase & Download Details

What kind of electrical diagrams are featured in this service manual? keyboard_arrow_down

Document includes comprehensive sections detailing the electrical system, which feature various wiring reference diagrams, terminal locations, and circuit component descriptions for the covered 1940-1958 models.

Is the manual designed to help with identifying ignition and charging system specifications for these motorcycle models? keyboard_arrow_down

Publication contains detailed specification tables covering ignition system settings and generator operation parameters. These sections provide reference data for various components without providing diagnostic steps.

Are there detailed charts for engine and transmission lubricant capacities, service intervals, and general maintenance specifications included for the owner? keyboard_arrow_down

Manual lists comprehensive service interval charts, lubrication requirement tables, and fluid capacity references for the engine and transmission systems. These tables serve as a centralized source for identifying maintenance parameters. Detailed cross-reference illustrations are also included to assist in locating specific service points on the motorcycle.

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