Harley Davidson Model 42 WLA WL & G Complete Workshop Service Repair Manual 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952
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🏷️ Basic Information Identification Make: Harley-Davidson Model: WLA / WL / G Product Name: Harley Davidson Model 42 WLA WL & G Complete Workshop Service Repair Manual 👋 Introduction Market Position Positioning: Essential resource for owners and restorers of vintage Harley-Davidson WLA, WL, and G series motorcycles, providing detailed factory-level repair information. Competitive Analysis Value Proposition: Offers significant cost savings for DIY repairs and maintenance compared to professional shop rates. Unlocks ability to perform complex tasks with confidence. Key Features Ease Of Use: Features step-by-step instructions and illustrations to simplify complex repair procedures. Accessibility: Downloadable to multiple devices (PC, Mac, tablet, smartphone) for convenient access in the workshop or on the go. 📋 Manual Details Coverage Areas Applicable Years: 1940, 1941, 1942, 1943, 1944, 1945, 1946, 1947, 1948, 1949, 1950, 1951, 1952 Model Variants Covered: WLA (Military), WL (Civilian), G (Servicar/Tricycle) Page Count Estimated Page Count: Highly comprehensive, likely exceeding 500 pages based on typical workshop manuals of this era covering multiple model years and variants. Manual Type Type: Complete Workshop Service and Repair Manual Language Language: English Format Format: Downloadable (PDF compatible) 📖 Manual Coverage Systems Covered Engine: Complete overhaul, tuning, carburetor service, lubrication systems, cooling systems (air-cooled). Transmission: Disassembly, assembly, repair, maintenance, clutch service, gearbox operation. Electrical System: Ignition system, lighting, battery maintenance, wiring diagrams, charging system, starter motor. Chassis And Suspension: Front fork service, rear suspension, wheel bearings, steering head maintenance, frame inspection. Braking System: Brake shoe adjustment, brake drum service, linkage maintenance. Fuel System: Fuel tank maintenance, fuel lines, fuel filters, carburetor rebuilding and adjustment (e.g., Linkert carburetors). Bodywork And Trim: Fender adjustments, saddlebag mounting (where applicable), control lever adjustments, general appearance items. Clutch: Assembly, disassembly, adjustment, replacement of clutch plates and springs. Carburetor Details: Detailed rebuild procedures for Linkert carburetors, including jetting, float level adjustment, and idle speed control. Ignition System Details: Magneto ignition system service, breaker point adjustment, condenser testing, spark plug specifications and gap settings. Wheel And Tire Service: Wheel bearing maintenance, spoke tensioning, tire pressure recommendations, rim strip inspection. Frame And Fork Service: Fork oil replacement and inspection, steering head bearing adjustment and lubrication, frame inspection for cracks or damage. G Model Specifics: Unique procedures and specifications for the Servicar (G model), including its differential and cargo box attachment. Procedures Included Maintenance: Scheduled maintenance tasks, lubrication, cleaning, periodic inspections. Troubleshooting: Diagnosis of common problems, step-by-step troubleshooting guides for performance issues. Repair: Detailed instructions for disassembly, component replacement, reassembly, and adjustment of all major systems. Technical Specifications: Torque specifications, clearances, tolerances, fluid capacities, and critical measurements. Cylinder Head Service: Removal, inspection, decarbonizing, valve seat grinding, valve guide replacement. Piston And Connecting Rod Service: Piston ring replacement, piston inspection, connecting rod bearing checks, and end play. Crankshaft Service: Main bearing inspection and replacement, crankshaft end play adjustment. Generator And Regulator: Generator testing, brush replacement, regulator adjustment (if applicable). Paint And Finish Guidelines: May include guidance on original finishes and paint codes, especially for WLA models. Technical Depth Depth: Comprehensive workshop level, suitable for experienced mechanics and dedicated enthusiasts. Covers detailed component breakdown, rebuild procedures, and diagnostic techniques. Diagnostic Charts: Likely includes diagnostic charts for common performance issues, helping to pinpoint problems quickly. Rebuild Instructions: Provides comprehensive, part-by-part instructions for complete engine, transmission, and other major component rebuilds. 📊 Manual Specifications File Format File Type: Digital (PDF or similar, requires Adobe Reader) Print Quality Quality: High quality scans/reproductions, designed for clarity of text and images, printable. Binding Type Binding: Not applicable for downloadable format; user can print and bind as desired. Paper Type Paper Type: Not applicable for downloadable format. ⚙️ Engine Specifications Primary Engine Type: Air-cooled, four-stroke, side-valve V-twin Displacement: Approximately 74 cubic inches (1213 cc) Bore X Stroke: Typically 3.3125 in x 3.5 in (84.14 mm x 88.9 mm) Compression Ratio: Varies, but typically around 5.5:1 to 6.0:1 Performance Horsepower: Estimated 20-25 HP at the crankshaft, depending on specific configuration and tuning. Torque: Not readily published in modern terms; emphasizes low-end grunt for military applications. Fuel System Carburetor: Primarily Linkert M-series (e.g., M-51, M-74), with specific adjustments and jetting for WLA variants. Fuel Type: Gasoline (lead content would have been common during original production) Engine Internals Valve Timing: Detailed specifications for valve opening and closing points relative to piston position. Oil Pump Specifications: Information on the oil pump's operation and any necessary adjustments or checks. 🔧 Transmission Standard Type: 3-speed constant mesh, foot-shifted with hand clutch lever Optional Variants: The G model (Servicar) had a different transmission, often incorporating a reverse gear, integrated into the unit construction. Features Clutch: Dry, multi-plate, operated by hand lever on the left handlebar. Gear Ratios Ratios: Specific gear ratios for 1st, 2nd, and 3rd gear will be detailed within the manual. 📐 Dimensions Exterior Wheelbase: Approximately 56.5 inches (1435 mm) Length: Approximately 89 inches (2260 mm) Weights...
Harley Davidson Model 42 WLA WL & G Complete Workshop Service Repair Manual
👋 Introduction
Market Position
Positioning:
Essential resource for owners and restorers of vintage Harley-Davidson WLA, WL, and G series motorcycles, providing detailed factory-level repair information.
Competitive Analysis
Value Proposition:
Offers significant cost savings for DIY repairs and maintenance compared to professional shop rates. Unlocks ability to perform complex tasks with confidence.
Key Features
Ease Of Use:
Features step-by-step instructions and illustrations to simplify complex repair procedures.
Accessibility:
Downloadable to multiple devices (PC, Mac, tablet, smartphone) for convenient access in the workshop or on the go.
May include guidance on original finishes and paint codes, especially for WLA models.
Technical Depth
Depth:
Comprehensive workshop level, suitable for experienced mechanics and dedicated enthusiasts. Covers detailed component breakdown, rebuild procedures, and diagnostic techniques.
Diagnostic Charts:
Likely includes diagnostic charts for common performance issues, helping to pinpoint problems quickly.
Rebuild Instructions:
Provides comprehensive, part-by-part instructions for complete engine, transmission, and other major component rebuilds.
📊 Manual Specifications
File Format
File Type:
Digital (PDF or similar, requires Adobe Reader)
Print Quality
Quality:
High quality scans/reproductions, designed for clarity of text and images, printable.
Binding Type
Binding:
Not applicable for downloadable format; user can print and bind as desired.
Paper Type
Paper Type:
Not applicable for downloadable format.
⚙️ Engine Specifications
Primary Engine
Type:
Air-cooled, four-stroke, side-valve V-twin
Displacement:
Approximately 74 cubic inches (1213 cc)
Bore X Stroke:
Typically 3.3125 in x 3.5 in (84.14 mm x 88.9 mm)
Compression Ratio:
Varies, but typically around 5.5:1 to 6.0:1
Performance
Horsepower:
Estimated 20-25 HP at the crankshaft, depending on specific configuration and tuning.
Torque:
Not readily published in modern terms; emphasizes low-end grunt for military applications.
Fuel System
Carburetor:
Primarily Linkert M-series (e.g., M-51, M-74), with specific adjustments and jetting for WLA variants.
Fuel Type:
Gasoline (lead content would have been common during original production)
Engine Internals
Valve Timing:
Detailed specifications for valve opening and closing points relative to piston position.
Oil Pump Specifications:
Information on the oil pump's operation and any necessary adjustments or checks.
🔧 Transmission
Standard
Type:
3-speed constant mesh, foot-shifted with hand clutch lever
Optional
Variants:
The G model (Servicar) had a different transmission, often incorporating a reverse gear, integrated into the unit construction.
Features
Clutch:
Dry, multi-plate, operated by hand lever on the left handlebar.
Gear Ratios
Ratios:
Specific gear ratios for 1st, 2nd, and 3rd gear will be detailed within the manual.
📐 Dimensions
Exterior
Wheelbase:
Approximately 56.5 inches (1435 mm)
Length:
Approximately 89 inches (2260 mm)
Weights
Dry Weight:
Around 500-600 lbs (227-272 kg) for WLA/WL, heavier for G models.
Engine Dimensions
Overall Engine Dimensions:
While specific external dimensions are less critical, the manual will provide internal component dimensions for tolerances.
🛡️ Safety Features
Ratings
Crash Test Results:
Not applicable for this era of motorcycle.
Active Features
Brakes:
Drum brakes front and rear.
Passive Features
Lighting:
Headlight, taillight, and often blackout lighting for military use.
💡 Technology Features
Infotainment
Features:
No modern infotainment systems. Focus is on mechanical and electrical functionality.
Driver Assistance
Features:
No driver assistance technologies; basic mechanical controls.
Connectivity
Features:
No connectivity features; purely mechanical operation.
🔧 Maintenance
Service Intervals
Oil Change:
Frequent oil changes recommended, typically every 1000-2000 miles or seasonally, depending on usage and lubrication system (e.g., total loss or recirculating).
Tune Up:
Regular checks of ignition timing, spark plugs, and carburetor adjustments are crucial for optimal performance.
Fluid Specifications
Engine Oil:
Specific weight oils recommended by Harley-Davidson for the era (e.g., SAE 50 or 60), often in a 'total loss' lubrication system or a recirculating system with a separate oil tank. Manual will detail exact type and capacity.
Transmission Oil:
Specific gear oil type required for the gearbox. Manual will list exact specification.
Known Issues
Carburetion:
Linkert carburetors can be finicky; require precise adjustment. Gumming and clogging are common if fuel is left in the system.
Electrical System:
Original wiring can degrade over time. Proper grounding and insulation are critical. Generator charging output needs regular verification.
Clutch And Transmission:
Wear in the clutch plates and engagement mechanisms, as well as potential wear in the transmission gears and bearings, require periodic inspection and adjustment.
Lubrication:
Ensuring proper oil flow, especially in older engines with total-loss systems, is paramount to prevent premature wear.
📚 Vehicle History
Brand Heritage
Legacy:
Harley-Davidson has a long history of producing robust motorcycles, with the WLA becoming iconic for its role in World War II.
Model Evolution
Development:
The WLA (from 'W' series, 'L' for civilian model, 'A' for Army) was a military adaptation of the civilian WL model, built in large numbers for Allied forces during WWII. The G model was the utilitarian Servicar, often used for light utility tasks and towing.
Production
Production Period:
WL civilian models produced from the 1930s, with WLA production peaking during WWII. The G series also had a long production run.
Wartime Significance:
Tens of thousands of WLA models were produced for military contracts, serving in various theaters of operation.
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