| Manufacturer | International Harvester |
| Price | 11,300(USD) |
| Model | 674 |
| Equipment Type | Utility Tractors |
| Factory | Doncaster, England |
NEBRASKA TRACTOR TEST 1128 2
| Description | Gasoline 8-speed 2WD April 26 - May 17, 1973 Link: Nebraska Tractor Test 1128 file PTO performance Drawbar performance Gear 3L used for power test. Gear 2L used for pull test. |
| Power at rated engine speed | 58.53hp / 43.6kW |
| Fuel use | 5.5gal/hour / 20.8l/hour |
| Power at rated PTO speed | 56.01hp / 41.8kW |
| Max power | 51.97hp / 38.8kW |
| Max pull | 6,583lbs / 2986kg |
NEBRASKA TRACTOR TEST 1129 2
| Description | Diesel 8-speed 2WD April 28 - May 17, 1973 Link: Nebraska Tractor Test 1129 file PTO performance Drawbar performance Gear 3L used for power test. Gear 2L used for pull test |
| Power at rated engine speed | 61.56hp / 45.9kW |
| Fuel use | 4.0gal/hour / 15.1l/hour |
| Power at rated PTO speed | 58.79hp / 43.8kW |
| Max power | 54.45hp / 40.6kW |
| Max pull | 6,833lbs / 3099kg |
INTERNATIONAL HARVESTER 674 POWER
| Drawbar (tested) | 54.45hp / 40.6kW |
| PTO (tested) | 61.56hp / 45.9kW |
ENGINES OVERVIEW
The International Harvester 674 tractor offers a choice between a 3.9L diesel engine, known for its fuel efficiency and torque output, and a 3.3L gasoline engine, which provides quicker throttle response. The diesel variant excels in heavy-duty applications and long operating hours, while the gasoline engine may be preferable for lighter tasks due to its lower initial cost and ease of maintenance. Consider the operational demands and fuel availability when choosing between the two engines to optimize performance for your specific agricultural or construction needs.
| Description | International Harvester 3.9L 4-cyl diesel International Harvester 3.3L 4-cyl gasoline |
ENGINE DETAIL 1
The International Harvester 674 is powered by a D239 diesel engine, providing robust performance with a displacement of 3.9L and a compression ratio of 16:1, ideal for efficient fuel combustion and torque generation. The dual-stage dry air cleaner enhances engine longevity by improving air filtration, making it suitable for dusty field conditions. Operating at a rated RPM of 2400, this tractor balances power and efficiency, making it versatile for various agricultural applications but could face challenges in high-altitude settings where air density decreases.
| Description | International Harvester D239 diesel 4-cylinder liquid-cooled |
| Displacement | 239ci / 3.9L |
| Bore/Stroke | 3.875x5.06inches / 98x 129 mm |
| Air cleaner | dual stage dry |
| Compression | 16:1 |
| Rated RPM | 2400 |
| Starter volts | 12 |
ENGINE DETAIL 2
The International Harvester 674 features a C200 gasoline engine with a displacement of 3.3L and a relatively low compression ratio of 7.33:1, enhancing fuel efficiency but limiting power output. The dual-stage dry air cleaner ensures improved engine longevity by providing effective filtration, crucial in dusty environments. Operating at a rated RPM of 2400, this tractor is suitable for moderate-duty agricultural applications, balancing power and economy for tasks such as tilling or hauling.
| Description | International Harvester C200 gasoline 4-cylinder liquid-cooled |
| Displacement | 200.3ci / 3.3L |
| Bore/Stroke | 3.8125x4.39inches / 97x 112 mm |
| Air cleaner | dual stage dry |
| Compression | 7.33:1 |
| Rated RPM | 2400 |
| Starter volts | 12 |
INTERNATIONAL HARVESTER 674 ENGINES
The International Harvester 674 tractor is equipped with either a 3.9L 4-cylinder diesel engine or a 3.3L 4-cylinder gasoline engine, offering versatility in fuel options. The 20-gallon (75.7L) fuel tank provides extended operation time, advantageous for larger agricultural tasks without frequent refueling. Consider the diesel engine for better fuel efficiency and torque, particularly in heavy-duty applications, while the gasoline variant may appeal for lighter, cost-sensitive operations.
| Description | International Harvester 3.9L 4-cyl diesel International Harvester 3.3L 4-cyl gasoline |
| Fuel tank | 20gal / 75.7L |
TRANSMISSION
The International Harvester 674 features an 8-speed forward and 4-speed reverse gearbox, enhancing versatility for various tasks, from plowing to transport. Its dry disc clutch provides a reliable engagement under normal operating conditions but may require adjustment over time to maintain performance. This tractor is well-suited for medium-duty agricultural applications, but operators should be mindful of clutch wear during heavy usage.
| Type | gear |
| Gears | 8 forward and 4 reverse |
| Clutch | dry disc |
MECHANICAL
The International Harvester 674 features a 4x2 2WD chassis, suitable for flat terrains with limited traction challenges in slippery conditions. Its power steering enhances maneuverability, while the hydraulic wet disc brakes provide reliable stopping power, reducing maintenance compared to dry systems. The 8-speed gear transmission allows versatile speed management, making it ideal for various farming tasks but may limit performance in steep or uneven landscapes.
| Chassis | 4x2 2WD |
| Steering | power |
| Brakes | hydraulic wet disc |
| Cab | Open operator station. Four-post ROPS and cab available. |
| Transmission | 8-speed gear |
HYDRAULICS
| Pump flow | 13gpm / 49.2lpm |
TRACTOR HITCH
| Rear Type | II |
| Control | position and draft control |
| Rear lift | 3969lbs / 1800kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540 |
INTERNATIONAL HARVESTER 674 TIRES
The International Harvester 674 tractor features agricultural tires sized 7.50-16 in the front and 16.9-30 in the rear, optimizing stability and traction in field operations. This configuration offers a balance between maneuverability and power, making it suitable for medium-duty tasks such as plowing and hauling. However, the rear tire size may limit its capability on steeper inclines, thus challenging performance in uneven terrains.
| Ag front | 7.50-16 |
| Ag rear | 16.9-30 |
DIMENSIONS
| Wheelbase | 84.5inches / 214cm |
| Length | 131inches / 332cm |
| Width | 70inches / 177cm |
| Height (steering wheel) | 62inches / 157cm |
| Height (cab) | 93inches / 236cm |
| Operating weight | 5,650lbs / 2562kg |
| Ballasted weight | 8,690lbs / 3941kg |
| Clearance (rear axle) | 23inches / 58cm |
| Front tread | 54 to 80inches / 137to 203 cm |
| Rear tread | 56 to 76inches / 142to 193 cm |
DIMENSIONS & TIRES
The International Harvester 674 tractor features a compact 84.5-inch wheelbase, which enhances maneuverability in tight spaces and makes it suitable for smaller farms or orchards. Weighing 5,650 lbs, its heft provides stability during operation, particularly when using heavy implements, but may limit mobility on soft or muddy terrain. The tire specifications (7.50-16 front and 16.9-30 rear) suggest good traction and load distribution, while also indicating potential challenges in achieving optimal flotation in soft ground conditions.
| Wheelbase | 84.5inches / 214cm |
| Weight | 5,650lbs / 2562kg |
| Front tire | 7.50-16 |
| Rear tire | 16.9-30 |
674 SERIAL NUMBERS
| Location | Transmission housing, left side |
| 1973 | 100001 |
| 1974 | 101862 |
| 1975 | 103172 |
| 1976 | 105946 |
| 1977 | 107555 |
ELECTRICAL
| Ground | negative |
| Battery volts | 12 |