This manual covers Big Twin motorcycles equipped with either the Knucklehead (OHV) or Flathead (SV) engines, manufactured between 1940 and 1947. These iconic motorcycles, produced in Milwaukee, Wisconsin, represent a significant era in American motorcycling. Known for their robust engineering and distinctive designs, the Knucklehead and Flathead models have earned a revered place in automotive history and remain highly sought after by enthusiasts and collectors. This documentation provides comprehensive technical information essential for understanding, maintaining, and restoring these classic machines.
The purpose of this Factory Service/Repair/Workshop Manual is to provide detailed guidance for owners, mechanics, and technicians. It covers a wide range of systems, including complete engine overhauls for both Knucklehead and Flathead configurations, electrical systems, fuel delivery, transmissions, chassis, suspension, brakes, and controls. The manual includes step-by-step repair and rebuild instructions, maintenance schedules, troubleshooting guides for common issues like oil leaks and carburetor tuning, and in-depth technical specifications. This resource is designed to empower users with the knowledge needed to ensure the optimal performance and longevity of their vintage motorcycles.
Harley Davidson FL Models Big Twins Knucklehead/flathead 1940-1947 Service Repair Workshop Manual
VEHICLE INTRODUCTION:
This professional service repair manual provides comprehensive coverage for the Ram. Designed for technicians, mechanics, and DIY enthusiasts, it contains factory-level repair procedures, diagnostic information, and technical specifications to ensure proper maintenance and repair.
SERVICE & REPAIR SCOPE:
- General information, safety warnings, and maintenance schedules
- Engine mechanical — disassembly, inspection, bore measurement, reassembly
- Transmission & clutch — gear inspection, chain/belt adjustment
- Fuel system — carburetor/EFI adjustment, fuel pump, filter replacement
- Electrical — ignition, charging system, wiring diagrams
- Suspension & steering — fork rebuild, shock service, steering adjustment
- Brake system — disc inspection, pad replacement, bleeding procedures
- Frame & bodywork — panel removal, fairing replacement
- Troubleshooting flowcharts and symptom-based diagnostics
TECHNICAL SPECIFICATIONS:
- Manufacturer: Ram
- Engine type and displacement: Refer to manual for detailed specifications
- Torque values and bolt specifications: All factory torque specs included
- Engine oil capacity and grade: Refer to maintenance section
- Spark plug gap and type: See specifications
- Tire pressure specifications: Refer to manual
- All factory specifications, tolerances, and wear limits included
- Special service tool numbers with illustrations
- Tightening torque specifications for all fasteners
DIAGNOSTIC INFORMATION:
- Symptom-based troubleshooting with diagnostic flowcharts
- Engine performance diagnostics — compression testing, ignition timing
- Carburetor/fuel injection tuning and troubleshooting
- Electrical system testing — multimeter procedures
- Wear limit inspections and allowable tolerances for all components
ILLUSTRATIONS & DIAGRAMS INCLUDED:
- Detailed wiring diagrams and electrical schematics
- Exploded-view parts diagrams with OEM part numbers
- Component identification and location guides
- System assembly and disassembly illustrations
- Step-by-step procedural diagrams with tool usage illustrations
- Troubleshooting flowcharts and diagnostic trees
COMPATIBILITY:
- Model coverage: All models, engine variants, and trim levels covered — refer to manual for specific model-year applicability
- Searchable PDF format — zoomable, printable, bookmarked chapters
- Works on Windows PC, Mac, tablets, and smartphones
FILE PROPERTIES:
- Format: Searchable PDF (zoomable, printable, bookmarked)
- Language: English
- Delivery: Instant digital download — no shipping, no waiting
- Access: Download again anytime after purchase
Harley Davidson FL Models Big Twins Knucklehead/flathead 1940-1947 Service Repair Workshop Manual
VEHICLE INTRODUCTION:
This professional service repair manual provides comprehensive coverage for the Ram. Designed for technicians, mechanics, and DIY enthusiasts, it contains factory-level repair procedures, diagnostic information, and technical specifications to ensure proper maintenance and repair.
SERVICE & REPAIR SCOPE:
- General information, safety warnings, and maintenance schedules
- Engine mechanical — disassembly, inspection, bore measurement, reassembly
- Transmission & clutch — gear inspection, chain/belt adjustment
- Fuel system — carburetor/EFI adjustment, fuel pump, filter replacement
- Electrical — ignition, charging system, wiring diagrams
- Suspension & steering — fork rebuild, shock service, steering adjustment
- Brake system — disc inspection, pad replacement, bleeding procedures
- Frame & bodywork — panel removal, fairing replacement
- Troubleshooting flowcharts and symptom-based diagnostics
TECHNICAL SPECIFICATIONS:
- Manufacturer: Ram
- Engine type and displacement: Refer to manual for detailed specifications
- Torque values and bolt specifications: All factory torque specs included
- Engine oil capacity and grade: Refer to maintenance section
- Spark plug gap and type: See specifications
- Tire pressure specifications: Refer to manual
- All factory specifications, tolerances, and wear limits included
- Special service tool numbers with illustrations
- Tightening torque specifications for all fasteners
DIAGNOSTIC INFORMATION:
- Symptom-based troubleshooting with diagnostic flowcharts
- Engine performance diagnostics — compression testing, ignition timing
- Carburetor/fuel injection tuning and troubleshooting
- Electrical system testing — multimeter procedures
- Wear limit inspections and allowable tolerances for all components
ILLUSTRATIONS & DIAGRAMS INCLUDED:
- Detailed wiring diagrams and electrical schematics
- Exploded-view parts diagrams with OEM part numbers
- Component identification and location guides
- System assembly and disassembly illustrations
- Step-by-step procedural diagrams with tool usage illustrations
- Troubleshooting flowcharts and diagnostic trees
COMPATIBILITY:
- Model coverage: All models, engine variants, and trim levels covered — refer to manual for specific model-year applicability
- Searchable PDF format — zoomable, printable, bookmarked chapters
- Works on Windows PC, Mac, tablets, and smartphones
FILE PROPERTIES:
- Format: Searchable PDF (zoomable, printable, bookmarked)
- Language: English
- Delivery: Instant digital download — no shipping, no waiting
- Access: Download again anytime after purchase
