1958-1959 Harley-Davidson Duo-Glide FL / FLH 74 OHV Repair Manual (P/N 99482-59)

• Official 100-page Harley-Davidson factory publication P/N 99482-59, 1959 edition
• Documents the 1958–1959 Harley-Davidson Duo-Glide FL and FLH 74 OHV engine family, including variant sidecar configurations
• Features 47 exploded-view diagrams and 110 numbered troubleshooting references to streamline shop-floor diagnostics

Technical Documentation Overview

The 1958–1959 Harley-Davidson service manual presents the complete technical layout across eight core sections. Technicians will find exact frame alignment specifications alongside procedures for wheel removal and steering damper adjustment. The engine segment focuses heavily on the 74 OHV powerplant. You get the factory benchmarks for cylinder head maintenance, valve train adjustment, and oil scavenger system operation. Fuel system and transmission chapters detail internal gear box timing, clutch plate specifications, and carburetor adjustments. Relying on these original factory methods helps prevent guesswork during complex teardowns. Always adhere to standard shop safety practices and use secure motorcycle lifts when referencing these structural limits during maintenance.

Specification Highlights

Precise service limits are critical for any proper rebuild. This manual provides the exact factory tolerances needed for the FL and FLH series. Transmission main drive gear end play is specified precisely at .003 to .013 inches. Oil pressure readings are documented at 35 to 38 pounds at speeds over 30 mph. Intake valve stem-to-guide clearance must sit strictly between .002 and .004 inches. Dedicated exploded views map out the clutch, shifter fork, and hydraulic fork assemblies. This documentation delivers the exact reference values mechanics need to accurately service the 74 OHV engine series without trial and error.