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Harley Davidson 1943 Technical Manual TM 9-879 Harley Davids
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🏷️ Basic Information Identification Make: Harley-Davidson Model: Harley-Davidson WLA (military motorcycle) Model Variant: 45 cubic inch flathead twin, US Army specification Manual Reference: TM 9-879 Technical Manual, US War Department...
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Tipa: Motorcycles
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Cod: 17753
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🏷️ Basic Information
Identification
Make:
Harley-Davidson
Model:
Harley-Davidson WLA (military motorcycle)
Model Variant:
45 cubic inch flathead twin, US Army specification
Manual Reference:
TM 9-879 Technical Manual, US War Department
Production
Years Covered:
1943 model year military production
Primary Service Years:
1942-1945 wartime production, applicable to postwar civilian WL models
Intended Users:
Army motor pool mechanics, ordnance personnel, and civilian restorers
👋 Introduction
Market Position
Target Audience:
Military maintenance personnel, vintage Harley restorers, collectors, and DIY owners working on 45 ci flathead models
Application:
Complete service, rebuild, and restoration reference for wartime military motorcycles
Key Advantages
Authenticity:
Original War Department technical manual content, the factory-issued service reference for this model
Completeness:
Covers every repair, rebuild, and refurbishment procedure with specifications and illustrations
Convenience:
Printable pages allow taking only needed sections into the workshop
Key Features
Illustrations:
Detailed illustrations, diagrams, and wiring schematics throughout
Instructions:
Step-by-step procedures for all diagnostic and repair operations
📋 Manual Details
Coverage Areas
Scope:
Complete service and repair coverage for the 1943 Harley-Davidson military motorcycle
Work Types:
Repair, maintenance, rebuild, refurbishment, and restoration
Manual Type
Manual Type:
Official military technical manual (TM 9-879)
Language:
English
Illustrations:
Line drawings, exploded views, wiring schematics, and specification tables
Format & Delivery
File Format:
PDF
Delivery Method:
Instant download after payment completion
Printing:
All pages printable
Shipping:
None required - digital delivery eliminates shipping cost and wait time
📖 Manual Coverage
Engine & Drivetrain
Engine Service:
Complete teardown, inspection, measurement, and rebuild of the 45 ci flathead V-twin
Cylinder & Heads:
Cylinder boring, honing, valve seat cutting, and head servicing procedures
Pistons & Rings:
Piston, pin, and ring fitting with factory clearances
Crankcase:
Crankcase disassembly, flywheel truing, and bearing replacement
Transmission:
3-speed hand-shift gearbox teardown, rebuild, and adjustment
Primary Drive:
Primary chain, clutch, and sprocket service
Carburetion:
Linkert carburetor disassembly, cleaning, and jetting specifications
Chassis & Electrical
Ignition:
Timer, coil, and magneto testing, timing, and adjustment
Electrical System:
Complete wiring schematics for generator, battery, and lighting circuits
Generator:
Generator and voltage regulator testing and overhaul
Frame & Forks:
Frame inspection and springer front fork overhaul
Wheels & Brakes:
Wheel lacing, spoke replacement, hub service, and brake adjustment
Suspension:
Rear spring and seat post servicing
Technical Depth
Procedures:
Step-by-step diagnostic, disassembly, repair, and reassembly instructions
Specifications:
Factory torque values, clearances, and wear limits
Troubleshooting:
Symptom-based diagnostic charts for engine, electrical, and drivetrain faults
Tools:
Special tool usage and improvised alternatives where applicable
Parts Information:
Exploded diagrams identifying components and part relationships
Maintenance
Lubrication:
Complete lubrication points, intervals, and oil capacities
Periodic Service:
Scheduled inspection and adjustment routines for military duty
Storage:
Preparation for storage and return-to-service procedures
📊 Manual Specifications
File & Compatibility
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print & Binding
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
⚙️ Engine Specifications
Engine
Engine Type:
45 cubic inch (740 cc) side-valve 45-degree V-twin, air-cooled flathead
Bore & Stroke:
Approximately 2.75 in x 3.8125 in (69.9 mm x 96.8 mm)
Compression Ratio:
Approximately 6.5:1, low-compression military specification
Carburetor:
Linkert 1-barrel carburetor with manual choke
Performance
Rated Power:
Approximately 23 hp, military-rated output
Lubrication:
Total-loss dry-sump oiling with mechanical oil pump
Ignition:
Battery and coil ignition with timer, autoradation unit
Fuel System
Fuel Supply:
Gravity-fed fuel tank with petcock shutoff
Fuel Type:
Regular-grade gasoline per wartime specification
🔧 Transmission
Transmission
Standard Transmission:
3-speed constant-mesh gearbox with hand-shift (tank shift) lever
Clutch:
Wet multi-plate clutch with hand-operated linkage
Final Drive:
Chain final drive
Primary Drive:
Chain primary drive
Features
Shift Pattern:
Hand lever mounted on the fuel tank, foot clutch pedal
Ratios:
N/A - gear ratios per manual tables in the transmission chapter
Service Coverage:
Full teardown, reassembly, and adjustment procedures included in TM 9-879
📐 Dimensions
Exterior
Wheelbase:
Approximately 58 inches (1470 mm)
Length:
N/A - not specified in available summary; see manual dimension tables
Ground Clearance:
Military specification for off-road use
Weights
Curb Weight:
Approximately 560 lb (254 kg) depending on equipment
Load Capacity:
Rated per military cargo rack and sidecar provisions
🛡️ Safety Features
Active Features
Brakes:
Mechanically operated drum brakes front and rear
Lighting:
Blackout and standard lighting modes per military requirements
Controls:
Hand-shift and foot-clutch control layout
Crash Test Ratings:
N/A - crash testing did not exist for 1943 motorcycles
Passive Features
Frame:
Heavy-duty rigid duplex tubular frame
Mirrors:
N/A - not standard on military specification
Rider Protection:
Fender and crash bar provisions per military configuration
💡 Technology Features
Electrical & Instruments
Generator:
6-volt generator with mechanical cutout relay
Lighting:
Headlamp with blackout mask, taillamp, and blackout marker lights
Instruments:
Speedometer with integral odometer
Horn:
Electric horn with handlebar button
Driver Assistance
Driver Assistance:
N/A - none existed on 1943 military motorcycles
Infotainment:
N/A - no audio or infotainment systems on this model
🔧 Maintenance
Service Intervals
Oil Changes:
Frequent crankcase oil changes per wartime service schedule
Chain Service:
Regular primary and final chain inspection, adjustment, and lubrication
Tune-Ups:
Periodic breaker point, spark plug, and carburetor adjustment
Scheduled Service:
Daily, weekly, and mileage-based checks per military maintenance routine
Fluid Specifications
Engine Oil:
Heavy-duty mineral engine oil, viscosity per seasonal grade chart in the manual
Transmission Oil:
Gear oil to manual specification
Primary Chain:
Chain lubricant per manual guidance
Capacities:
Oil tank and gearbox capacities listed in specification tables
Known Issues / Wear Items
Common Wear:
Breaker points, spark plugs, brushes, and chains are routine replacement items
Oil Leaks:
Total-loss lubrication system drips are characteristic of the 45 ci flathead
Valve Service:
Periodic valve and seat grinding as part of scheduled upkeep
📚 Vehicle History
Brand Heritage
Manufacturer:
Harley-Davidson Motor Company, Milwaukee, Wisconsin, USA
Founded:
1903, the oldest continuously operating American motorcycle manufacturer
Wartime Role:
Major supplier of military motorcycles to US and Allied forces in World War II
Model Evolution
WLA Origins:
Military version of the civilian WL 45 ci flathead developed for Army service
Production Run:
Approximately 90,000 WLA motorcycles built during World War II
Nickname:
Known as the Liberator
Production Location
Factory:
Harley-Davidson plant, Milwaukee, Wisconsin
Manual Origin:
Published by the US War Department as TM 9-879
🏆 Awards & Recognition
Recognition
Historic Status:
The WLA is regarded as one of the most significant American military motorcycles of World War II
Collector Value:
Highly sought-after model in the vintage motorcycle restoration community
Manual Status:
TM 9-879 remains the definitive factory-era service reference for the 45 ci flathead
Specific Awards:
N/A - no formal awards apply to a 1943 military technical manual