1958-1959 Harley-Davidson Duo-Glide 74 OHV & Servi-Car Service Manual (140 P.)
Factory service documentation for 74 OHV Duo-Glide and Servi-Car models — complete procedures for clutch assembly, transmission repair, and ignition timing. Part No. 99482-59
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Sample pages from the 1958-1959 Harley-Davidson Duo-Glide 74 OHV & Servi-Car Service Manual (140 P.) manual
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Harley-Davidson Models Covered & Key Technical Specifications
Models: Harley-Davidson Duo-Glide 74 OHV, FL, FLH
Sub-models / Variants: Solo, Sidecar, 3-speed transmission, 4-speed transmission
Build Years: 1958–1959
Technical Data:
- Engine: 45 degree V-Type, 2 cylinders
- Displacement: 1,207 cc (73.66 cu. in.)
- Horsepower: 58.5 HP (FLH) or 53.0 HP (FL) at 5,400 RPM
- Max Torque: 65 lb-ft (FLH) or 62 lb-ft (FL) at 3,200 RPM
- Compression Ratio: 8:1 (FLH), 7.25:1 (FL)
- Fuel Capacity: 3-3/4 gallons
- Transmission: Constant mesh, 4 forward speeds (or optional 3 forward and 1 reverse)
Harley-Davidson Manual Features & Content Preview
1958–1959 Harley-Davidson Duo-Glide 74 OHV Technical Features
- Built for owners and workshops servicing the 1958–1959 Harley-Davidson Duo-Glide 74 OHV and FL/FLH variants, covering engine, chassis, and transmission systems.
- Official OEM publication P/N 99482-59, the primary factory reference for late 1950s big-twin service.
- Contains 140 pages of detailed technical content, including 85+ exploded-view diagrams, transmission gear ratio tables, and valve timing specifications.
- Delivered as a direct download the moment payment clears.
- No shipping wait — the PDF is available immediately after purchase.
- Full-text search finds any part number in seconds.
- OCR text layer lets you jump to a torque spec by keyword.
- This 1959 first edition is the definitive reference for the FL and FLH Duo-Glide 74 OHV build, documenting essential clearance and assembly data for the period-correct engine configurations.
Document Coverage and Technical Insight
The 1959 Harley-Davidson Duo-Glide 74 OHV service manual provides complete mechanical specifications and assembly procedures for the classic Big Twin platform. Detailed sections document the maintenance requirements for the 1,207 cc V-type engine, including valve spring tension ranges, tappet clearances, and oil pump pressure benchmarks. The chassis section outlines the maintenance of the Hydra-Glide front forks, including oil filling methods and bushing reaming procedures. Additional focus is placed on transmission and clutch systems, documenting gear box ratios, gear-shifting linkage adjustments, and internal disc clearances.
Specification Data and Reference Values
Engine assembly data covers connecting rod alignments, cylinder bore measurements, and piston ring gap tolerances. Main bearing end play is documented as 0.0001–0.0010 in. for optimized engine rotation. Transmission gear backlash is specified at 0.003–0.006 in. for 4-speed configurations. Hydraulic fork oil capacity is established at 7 oz. per slider tube for standard units. This official Harley-Davidson factory workshop manual covers the 1958–1959 Duo-Glide 74 OHV, providing essential engine, chassis, electrical, and transmission service data for the authentic restoration and maintenance of the classic FL/FLH series.
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