The International Harvester (IH) 674 diesel tractor is generally considered a solid and reliable utility tractor. Manufactured from 1973 to 1977 in Doncaster, England, the IH 674 was designed for general farm work and has earned a reputation for its durability and versatility. This model features a robust 3.9L four-cylinder diesel engine, providing ample power for various agricultural tasks.
The IH 674 offers a good balance of power and functionality, making it suitable for a wide range of farm applications. Its design incorporates several features that contribute to its overall performance and user-friendliness. Let's take a closer look at some key specifications of the IH 674 diesel tractor:
| Specification | Details |
|---|---|
| Engine | 3.9L 4-cylinder diesel (D239) |
| Power (PTO) | 61.56 hp |
| Transmission | 8 forward, 4 reverse gears |
| Weight | 5,644 lbs (2,560 kg) |
| Fuel Capacity | 20 US gallons (75.7 L) |
Engine and Performance
The heart of the IH 674 diesel tractor is its International Harvester D239 engine. This 3.9L four-cylinder diesel powerplant is known for its reliability and strong performance. With a bore and stroke of 98.0 mm x 129.0 mm and a compression ratio of 16:1, this engine delivers impressive power for its size.
One of the standout features of the D239 engine is its tested PTO power of 61.56 hp. This power output is more than sufficient for most farm tasks, including plowing, harrowing, and operating various implements. The engine's design also contributes to its fuel efficiency, with a fuel consumption rate of approximately 4.0 gallons per hour under normal working conditions.
The IH 674's engine is paired with a gear-type transmission featuring 8 forward and 4 reverse speeds. This transmission setup provides good flexibility for different tasks and working conditions. The live PTO is another valuable feature, allowing the operator to engage or disengage the PTO without stopping the tractor's movement.
Hydraulics and Hitch System
The hydraulic system of the IH 674 is designed to handle a variety of implements effectively. With a pump flow rate of 13 gallons per minute (49.2 L/min), it provides sufficient power for most hydraulic implements. This system supports the tractor's three-point hitch, which is rated as a Category II hitch.
One of the impressive aspects of the IH 674 is its lift capacity. The three-point hitch can lift up to 3,970 lbs (1,800 kg) at the hitch points. This substantial lifting capacity makes the tractor versatile enough to handle a wide range of farm implements, from plows and cultivators to seeders and sprayers.
Comfort and Ergonomics
While the IH 674 was primarily designed as a workhorse, it doesn't completely neglect operator comfort. The tractor features an open operator station as standard, but models equipped with a four-post ROPS (Roll-Over Protective Structure) or a full cab were also available.
The tractor is equipped with hydrostatic power steering, which significantly reduces operator fatigue during long working hours. This feature, combined with the tractor's relatively compact size, makes it maneuverable and easy to handle in tight spaces.
Durability and Maintenance
One of the key reasons for the IH 674's popularity is its durability. The tractor's robust construction and simple mechanical design contribute to its longevity. Many IH 674 tractors are still in service today, decades after their manufacture, which is a testament to their build quality.
Maintenance on the IH 674 is generally straightforward due to its mechanical simplicity. However, there are a few areas that require regular attention:
- The brakes and parking brake are known weak spots and may require more frequent maintenance
- Regular oil changes and filter replacements are crucial for engine longevity
- The hydraulic system should be checked regularly for leaks and fluid levels
Versatility and Applications
The IH 674 diesel tractor shines in its versatility. Its power output, combined with its robust hydraulic system and substantial lift capacity, makes it suitable for a wide range of farm applications. Some common uses include:
- Hay making operations (mowing, raking, baling)
- Light to medium tillage work
- Planting and seeding
- Operating loaders for material handling
- Powering stationary equipment through the PTO
Potential Drawbacks
While the IH 674 is generally considered a good tractor, it's not without its potential issues:
- Some users report hard starting in cold weather, which may be related to injection pump timing
- The tractor's age means that finding original parts can sometimes be challenging
- The open station models offer limited protection from the elements
- Compared to modern tractors, it lacks advanced features like electronic controls or precision farming capabilities
FAQs About IH 674 Diesel Tractors
- How much horsepower does an IH 674 diesel tractor have?
The IH 674 diesel tractor has a tested PTO horsepower of 61.56 hp. - Is the IH 674 good for small farm operations?
Yes, the IH 674 is well-suited for small to medium-sized farms due to its versatility and reliable performance. - What type of transmission does the IH 674 have?
The IH 674 features a gear-type transmission with 8 forward and 4 reverse speeds. - Can the IH 674 handle modern farm implements?
While it can handle many implements, its hydraulic flow and hitch capacity may limit use with some larger, modern equipment. - Are parts still available for the IH 674 tractor?
Many parts are still available, but some original components may be harder to find due to the tractor's age.
In conclusion, the IH 674 diesel tractor is generally considered a good, reliable workhorse for farm operations. Its strong engine, versatile hydraulic system, and durable construction make it a popular choice among farmers who appreciate its simplicity and effectiveness. While it may lack some modern features, its proven track record of performance and longevity makes it a solid option for those seeking a dependable utility tractor.