Target Audience:
        
        
            Harley-Davidson WLA owners, restorers, and mechanics
        
     
    
    
        
            Authenticity:
        
        
            Genuine factory information, not a third-party imitation
        
     
    
    
        
            Value Proposition:
        
        
            Enables DIY repairs, saving on labor costs
        
     
    
        
            Resource Type:
        
        
            Ultimate resource for WLA owners
        
     
 
    
    
    
        
            Primary Coverage:
        
        
            Service, Maintenance, Repair, Tuning
        
     
    
        
            All Components:
        
        
            Coverage for every component from engine to electrical systems.
        
     
    
    
        
            Estimated Page Count:
        
        
            Extensive (Specific count not provided, but described as comprehensive)
        
     
    
    
        
            Type:
        
        
            Factory Service Repair Manual
        
     
    
    
    
    
        
            File Format:
        
        
            PDF Download
        
     
 
    
    
    
        
            Engine:
        
        
            Complete engine disassembly, assembly, diagnosis, and tuning
        
     
    
        
            Transmission:
        
        
            Service and repair procedures for the transmission
        
     
    
        
            Electrical System:
        
        
            Wiring diagrams, component testing, troubleshooting, and repair
        
     
    
        
            Chassis:
        
        
            Frame, suspension, wheels, and brakes
        
     
    
        
            Fuel System:
        
        
            Carburetor service, fuel lines, and fuel tank maintenance
        
     
    
        
            Exhaust System:
        
        
            Inspection, repair, and replacement
        
     
    
        
            Bodywork And Trim:
        
        
            Body panel repair, paintwork guidance, and trim installation
        
     
    
        
            Suspension:
        
        
            Front fork (Spring fork, often with a damper) and rear suspension (rigid frame)
        
     
    
        
            Brakes:
        
        
            Detailed inspection, adjustment, and repair of drum brake mechanisms.
        
     
    
        
            Wheels And Tires:
        
        
            Wheel bearing service, spoke tensioning, tire selection and mounting guidance.
        
     
    
    
        
            Maintenance:
        
        
            Routine service, lubrication, fluid changes, and inspection schedules
        
     
    
        
            Troubleshooting:
        
        
            Diagnostic flowcharts and symptom-based problem solving
        
     
    
        
            Repair:
        
        
            Detailed step-by-step repair instructions for all major components
        
     
    
        
            Tuning And Adjustment:
        
        
            Carburetor tuning, ignition timing adjustments, and performance optimization
        
     
    
        
            Engine Rebuild:
        
        
            Full engine disassembly, overhaul, and reassembly procedures.
        
     
    
        
            Ignition System Service:
        
        
            Spark plug, ignition coil, distributor (if applicable), points, and condenser service.
        
     
    
    
        
            Depth:
        
        
            Comprehensive, covering from basic maintenance to full rebuilds
        
     
    
        
            Illustrations:
        
        
            Detailed illustrations and diagrams accompany procedures.
        
     
    
        
            Specifications Data:
        
        
            Includes torque specifications, clearances, and tolerances for various components.
        
     
 
    
    
    
        
            Engine Type:
        
        
            Flathead V-Twin (OHV)
        
     
    
        
            Engine Displacement:
        
        
            45 cubic inches (740 cc)
        
     
    
        
            Bore X Stroke:
        
        
            3.00 in x 3.50 in (76.2 mm x 88.9 mm)
        
     
    
        
            Compression Ratio:
        
        
            Varies by year and specific model, typically around 5.0:1 to 6.0:1
        
     
    
    
        
            Horsepower:
        
        
            Approximately 20-24 hp (net) at 4800 RPM
        
     
    
        
            Torque:
        
        
            Approximately 30-35 ft-lbs at 3200 RPM
        
     
    
    
        
            Carburetor Type:
        
        
            Linkert M-series (e.g., M-53, M-74)
        
     
    
        
            Fuel Type:
        
        
            Gasoline (Leaded fuel historically, unleaded with precautions)
        
     
 
    
    
    
        
            Transmission Type:
        
        
            3-speed constant mesh, manual (Hand clutch, foot shift)
        
     
    
    
        
            Optional Transmission:
        
        
            N/A for WLA models
        
     
    
    
        
            Clutch Type:
        
        
            Wet, multi-plate, foot-pedal operated
        
     
    
        
            Drive Type:
        
        
            Chain drive to rear wheel
        
     
 
    
    
    
        
            Safety Ratings:
        
        
            N/A (Historical military vehicle, no modern crash ratings)
        
     
    
    
        
            Brakes:
        
        
            Drum brakes (Front and Rear)
        
     
    
    
        
            Lighting:
        
        
            Headlight, tail light, brake light, and often military blackout lights
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Typically every 1,000-2,000 miles, or annually (consult manual for specifics)
        
     
    
        
            Tune Up Interval:
        
        
            Regularly, especially ignition points and carburetor adjustments
        
     
    
    
        
            Engine Oil Type:
        
        
            Viscosity SAE 50 or SAE 60 motorcycle oil (common for flathead engines, consult manual for exact specification)
        
     
    
        
            Transmission Oil Type:
        
        
            Gear oil, typically SAE 90 (consult manual)
        
     
    
        
            Primary Chaincase Oil:
        
        
            Motorcycle specific primary oil or SAE 50 engine oil (consult manual)
        
     
    
        
            Brake Fluid:
        
        
            N/A (Mechanical drum brakes, no hydraulic fluid)
        
     
    
    
        
            Common Wear Items:
        
        
            Ignition points, condensers, carburetor gaskets/diaphragms, valve guides, primary chain adjustment.
        
     
    
        
            Engine Care:
        
        
            Proper oil viscosity and level are critical for flathead engine longevity.
        
     
 
    
    
    
        
            Brand Origin:
        
        
            Founded in 1903, Milwaukee, Wisconsin, USA
        
     
    
    
        
            Wla Development:
        
        
            Developed from civilian models for military use, notably during WWII. Optimized for ruggedness and reliability.
        
     
    
    
        
            Production Period:
        
        
            Significant production from late 1930s through WWII, with continued civilian variants and production into the 1950s and variations covered by the manual up to 1973.
        
     
    
        
            Military Use:
        
        
            Widely used by the U.S. Army and its allies during World War II.