International Harvester 434 Tractor

Manufacturer	International Harvester
Price	-
Model	434
Equipment Type	Utility Tractors
Factory	Louisville, Kentucky, USA

INTERNATIONAL HARVESTER 434 POWER

Engine

43hp / 32.1kW

ENGINES OVERVIEW

The International Harvester 434 features a versatile 2.5L 4-cylinder engine available in both diesel and gasoline variants, offering optimal performance and fuel efficiency for small to medium agricultural operations. The diesel engine provides enhanced torque and durability, making it ideal for heavy-duty tasks, while the gasoline option may offer lighter weight and lower initial costs. However, the choice of engine affects operational costs and maintenance, with diesel generally providing better long-term fuel economy but potentially higher upfront expenses.

Description

International Harvester 2.5L 4-cyl diesel/International Harvester 2.5L 4-cyl gasoline

ENGINE DETAIL 1

The International Harvester 434 features a robust 2.5L diesel engine delivering 43hp at 2000 RPM, making it suitable for light to moderate agricultural tasks. With a torque peak of 115.1 lb-ft at 1300 RPM, it provides effective pulling power, ideal for applications like hay baling or light plowing. The 12-volt starter and manageable oil capacity of 6 quarts facilitate ease of maintenance, but the relatively low power output may limit its performance in heavier, commercial-grade applications.

Description	International Harvester diesel 4-cylinder liquid-cooled
Displacement	154ci / 2.5L
Bore/Stroke	3.50x4.00inches / 89x 102mm
Power	43hp / 32.1kW
Rated RPM	2000
Torque	115.1lb-ft / 156.1Nm
Torque RPM	1300
Starter volts	12
Oil capacity	6 qts /5.7 L

ENGINE DETAIL 2

The International Harvester 434 features a reliable 4-cylinder gasoline engine with a displacement of 2.5L, optimized for moderate power output at a rated RPM of 2200, making it suitable for general agricultural tasks. Its bore and stroke dimensions (3.50 x 4.00 inches) suggest a focus on torque generation, enhancing performance during heavy load operations. However, the limited firing order of 1-3-4-2 may result in smoother operation but could impact overall efficiency when compared to more modern engines with varying firing sequences.

Description	International Harvester gasoline 4-cylinder liquid-cooled
Displacement	154ci / 2.5L
Bore/Stroke	3.50x4.00inches / 89x 102mm
Rated RPM	2200
Firing order	1-3-4-2

INTERNATIONAL HARVESTER 434 ENGINES

The International Harvester 434 tractor is equipped with a 2.5L 4-cylinder diesel or gasoline engine, offering versatility depending on fuel preference. Its 12.7-gallon fuel tank provides a balance between operating duration and weight management, making it suitable for moderate agricultural tasks. However, users must consider the engine type's torque characteristics for specific applications, with diesel offering better fuel efficiency and low-end power compared to gasoline.

Description	International Harvester 2.5L 4-cyl diesel/International Harvester 2.5L 4-cyl gasoline
Fuel tank	12.7gal / 48.1L

TRANSMISSION

The International Harvester 434 tractor features an 8-forward and 2-reverse gear configuration, providing versatile speed and torque options for various agricultural tasks. This transmission setup allows for efficient maneuverability in tight spaces while enabling operators to select appropriate gearing for different field conditions. However, the limited reverse options may pose challenges in scenarios requiring frequent backing, such as loading or navigating obstacles.

Gears

8 forward and 2 reverse

MECHANICAL

The International Harvester 434 features a 4x2 2WD chassis, providing limited traction on uneven terrain compared to 4WD models; this makes it suitable for flat, even fields. The mechanical steering system offers direct control, but can require more physical effort, impacting operator comfort during long hours. With an 8-speed transmission, the tractor provides flexibility in speed management, enhancing its versatility for various agricultural tasks, though it may lack the smooth shifting found in modern hydrostatic systems.

Chassis	4x2 2WD
Steering	mechanical
Cab	Open operator station
Transmission	8-speed

HYDRAULICS

Pump flow

7.0gpm / 26.5lpm

TRACTOR HITCH

Rear lift

2579lbs / 1169kg

POWER TAKE-OFF (PTO)

Rear RPM

540

INTERNATIONAL HARVESTER 434 TIRES

The International Harvester 434 tractor features an Ag front tire size of 7.50-16 and a rear size of 12.4-32, which provide good traction and stability on various terrains. Its relatively compact size and moderate horsepower make it suitable for small to medium agricultural tasks, but it may face challenges with heavier loads or in very soft soil conditions. Overall, this tractor is optimal for small farms or hobbyists requiring maneuverability and versatility in field operations.

Ag front	7.50-16
Ag rear	12.4-32

DIMENSIONS

Wheelbase	76.38inches / 194cm
Length	118.11inches / 299cm
Height	87.40inches / 221cm
Weight	4630lbs / 2100kg

DIMENSIONS & TIRES

The International Harvester 434 tractor, with a wheelbase of 76.38 inches, offers good stability and maneuverability for its weight class of 4630 lbs (2100 kg), making it suitable for small to medium-sized agricultural operations. The tire sizes—front 7.50-16 and rear 12.4-32—provide a balance of traction and flotation, critical for varying soil conditions. However, the limited rear tire width may pose challenges in heavy tillage scenarios, requiring careful weight management and possibly additional ballast for optimal performance.

Wheelbase	76.38inches / 194cm
Weight	4630lbs / 2100kg
Front tire	7.50-16
Rear tire	12.4-32

434 SERIAL NUMBERS

Location	Serial number plate on the right side of the 434 frame
1966	501 (gasoline)
1967	1050 (gasoline)
1968	1963 (gasoline)
1969	2441 (gasoline)
1970	2952 (gasoline)
1971	31618 (diesel)
Final	3359 (gasoline)

ELECTRICAL

Ground	positive
Charging system	Lucas generator
Charging amps	50
Battery CCA	1000

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