This workshop service manual provides comprehensive information for the International Harvester (IH) Farmall A, AV, B, and BN tractors, produced between 1939 and 1948. These tractors, powered by the International C-113 engine, were designed for farm work and are known for their robust construction and reliability. The Farmall A, with its 113 cubic inch, 4-cylinder engine, offered between 15-16 drawbar horsepower, while the AV, B, and BN variants provided slightly more power and different fuel options, including gasoline. These models feature a 4-speed sliding gear transmission and a 2-wheel drive configuration, embodying the engineering standards of their era.
This manual serves as an essential guide for the service, repair, maintenance, and troubleshooting of your IH Farmall tractor. It covers all major systems, including engine overhaul, fuel and cooling systems, drivetrain components, and chassis systems such as brakes and hydraulics. Detailed, step-by-step instructions, accompanied by illustrations, are provided for routine maintenance, preventative care, and complex repairs, making it suitable for farm owners, collectors, mechanics, and DIY enthusiasts. The manual extensive coverage ensures that owners can effectively maintain their tractors, saving time and money on repairs.
International Harvester Farmall A AV B BN Tractor Service Repair Workshop Manual PDF
VEHICLE/EQUIPMENT INTRODUCTION:
The International Harvester Farmall A, AV, B, and BN tractors, produced between 1939 and 1948, are iconic row-crop tractors that defined an era of American agriculture. The Farmall A was introduced in 1939 as a smaller alternative to the Farmall H, powered by the International C-113 engine producing approximately 15-16 drawbar horsepower on regular fuel. The AV variant runs on vaporized gasoline (propane/kerosene), while the B is essentially the same tractor with a different hood and grille design, and the BN is the narrow-row version.
These tractors feature a distinctive tricycle front wheel configuration with adjustable rear tread width, making them ideal for cultivating row crops such as corn and cotton. With over 128,000 Farmall A and AV units produced at the Tractor Works in Chicago, these machines are among the most collectible vintage tractors today. Their simple 4-speed sliding gear transmission, magneto ignition system, and robust C-113 engine make them relatively easy to maintain, though original parts knowledge is invaluable.
SERVICE & REPAIR SCOPE:
- Engine C-113: cylinder head decarbonizing, valve grinding, piston ring replacement
- Magneto ignition: magneto disassembly, points and condenser service, timing adjustment
- Carburetor: Zenith or updraft carburetor rebuild, fuel mixture adjustment
- Ignition system: spark plug wire routing, distributor cap inspection
- 4-speed sliding gear transmission: gear tooth inspection, bearing replacement
- Cooling system: thermosiphon cooling maintenance, water pump (if equipped) service
- Braking system: single brake adjustment, brake band replacement
- Hydraulics: Farmall touch-control hydraulic system service (if equipped)
- Front axle: tricycle wheel fork inspection, kingpin bushing replacement
- Rear axle: differential gear setup, final drive inspection
TECHNICAL SPECIFICATIONS:
- Engine: International C-113, 113 cu in (1.85L), 4-cylinder, naturally aspirated
- Fuel type: Gasoline/distillate (A/B), vaporized fuel (AV/BN)
- Power: approximately 15-16 drawbar HP, 20 belt HP
- Engine speed: 1400 RPM governed
- Bore x Stroke: 3.0 x 4.0 inches
- Transmission: 4-speed sliding gear, 1 reverse
- Drive: 2-WD only
- Front tire: 4.00-15 4-ply, Rear tire: 9-24 4-ply
- Weight: approximately 1780 lb (808 kg)
- Wheelbase: 71 inches
DIAGNOSTIC INFORMATION:
- Magneto timing: alignment of timing marks, impulse coupler function check
- Compression testing: acceptable ring seal condition for vintage engine
- Carburetor float level: fuel level at nozzle orifice, needle and seat inspection
- Engine overheating: thermosiphon system flow check, radiator tube inspection for blockage
- Transmission slipping: gear engagement depth check, shift fork wear assessment
- Magneto failure: condenser breakdown testing, breaker point gap verification (typically 0.015 inch)
- Oil pressure: visual drip-feed system inspection, oil pump wear check
- Starting difficulties: impulse starter function, valve timing on reassembly
ILLUSTRATIONS & DIAGRAMS INCLUDED:
- C-113 engine exploded views with part numbers
- Magneto assembly and timing detail
- Carburetor cross-section with jet identification
- Transmission and rear axle exploded assembly
- Farmall A dimensional drawings
- Touch-control hydraulic schematic (if applicable)
- Adjusted tread width spacing diagrams
COMPATIBILITY:
- Covers models: Farmall A, AV, B, BN
- Production years: 1939-1948
- Service manual reference: GSS-5031
- Searchable PDF document format
FILE PROPERTIES:
- Format: Searchable PDF
- Language: English
- Delivery: Instant digital download
- Access: Download anytime after purchase
International Harvester Farmall A AV B BN Tractor Service Repair Workshop Manual PDF
VEHICLE/EQUIPMENT INTRODUCTION:
The International Harvester Farmall A, AV, B, and BN tractors, produced between 1939 and 1948, are iconic row-crop tractors that defined an era of American agriculture. The Farmall A was introduced in 1939 as a smaller alternative to the Farmall H, powered by the International C-113 engine producing approximately 15-16 drawbar horsepower on regular fuel. The AV variant runs on vaporized gasoline (propane/kerosene), while the B is essentially the same tractor with a different hood and grille design, and the BN is the narrow-row version.
These tractors feature a distinctive tricycle front wheel configuration with adjustable rear tread width, making them ideal for cultivating row crops such as corn and cotton. With over 128,000 Farmall A and AV units produced at the Tractor Works in Chicago, these machines are among the most collectible vintage tractors today. Their simple 4-speed sliding gear transmission, magneto ignition system, and robust C-113 engine make them relatively easy to maintain, though original parts knowledge is invaluable.
SERVICE & REPAIR SCOPE:
- Engine C-113: cylinder head decarbonizing, valve grinding, piston ring replacement
- Magneto ignition: magneto disassembly, points and condenser service, timing adjustment
- Carburetor: Zenith or updraft carburetor rebuild, fuel mixture adjustment
- Ignition system: spark plug wire routing, distributor cap inspection
- 4-speed sliding gear transmission: gear tooth inspection, bearing replacement
- Cooling system: thermosiphon cooling maintenance, water pump (if equipped) service
- Braking system: single brake adjustment, brake band replacement
- Hydraulics: Farmall touch-control hydraulic system service (if equipped)
- Front axle: tricycle wheel fork inspection, kingpin bushing replacement
- Rear axle: differential gear setup, final drive inspection
TECHNICAL SPECIFICATIONS:
- Engine: International C-113, 113 cu in (1.85L), 4-cylinder, naturally aspirated
- Fuel type: Gasoline/distillate (A/B), vaporized fuel (AV/BN)
- Power: approximately 15-16 drawbar HP, 20 belt HP
- Engine speed: 1400 RPM governed
- Bore x Stroke: 3.0 x 4.0 inches
- Transmission: 4-speed sliding gear, 1 reverse
- Drive: 2-WD only
- Front tire: 4.00-15 4-ply, Rear tire: 9-24 4-ply
- Weight: approximately 1780 lb (808 kg)
- Wheelbase: 71 inches
DIAGNOSTIC INFORMATION:
- Magneto timing: alignment of timing marks, impulse coupler function check
- Compression testing: acceptable ring seal condition for vintage engine
- Carburetor float level: fuel level at nozzle orifice, needle and seat inspection
- Engine overheating: thermosiphon system flow check, radiator tube inspection for blockage
- Transmission slipping: gear engagement depth check, shift fork wear assessment
- Magneto failure: condenser breakdown testing, breaker point gap verification (typically 0.015 inch)
- Oil pressure: visual drip-feed system inspection, oil pump wear check
- Starting difficulties: impulse starter function, valve timing on reassembly
ILLUSTRATIONS & DIAGRAMS INCLUDED:
- C-113 engine exploded views with part numbers
- Magneto assembly and timing detail
- Carburetor cross-section with jet identification
- Transmission and rear axle exploded assembly
- Farmall A dimensional drawings
- Touch-control hydraulic schematic (if applicable)
- Adjusted tread width spacing diagrams
COMPATIBILITY:
- Covers models: Farmall A, AV, B, BN
- Production years: 1939-1948
- Service manual reference: GSS-5031
- Searchable PDF document format
FILE PROPERTIES:
- Format: Searchable PDF
- Language: English
- Delivery: Instant digital download
- Access: Download anytime after purchase
