Introduction
International Harvester 684 Utility Tractor
The International Harvester 684 is a utility tractor produced between 1977 and 1984 in Doncaster, England. Designed for general agricultural tasks, this model serves as a mid-range workhorse known for its mechanical reliability and structural versatility.
Engine and Performance
The tractor is powered by the International Harvester D-239 liquid-cooled diesel engine. This 4-cylinder powerplant features a 239 cubic-inch (3.9 L) displacement and delivers a rated output of 69 horsepower (51.5 kW) at 2400 RPM. The engine utilizes a dry air cleaner and operates on a 12-volt starting system.
Transmission and Drivetrain
The 684 offers two transmission configurations. The standard unit is an 8-speed syncromesh transmission with four synchronized gears across high, low, and reverse ranges. An optional Torque Amplifier (TA) provides a two-speed power shift, expanding the range to 16 forward and 8 reverse gears, allowing for clutchless shifting between direct drive and a lower reduction speed.
Hydraulics and Hitch
Equipped with an open-center hydraulic system, the tractor provides a pump flow of 13 gpm (49.2 lpm), with an optional upgrade to 15.4 gpm (58.3 lpm). The system includes 1 or 2 valves and has a hydraulic capacity of 9 gallons. The rear Category II hitch features integrated position and draft control, supporting a lift capacity of 3600 lbs (1632 kg).
Chassis and Operation
The chassis is available in both two-wheel and four-wheel drive configurations. Operator control is facilitated by power steering and independent hydraulic wet disc brakes. The machine supports various configurations, including ROPS canopy or enclosed cab options, and utilizes a rear independent PTO operating at 540 RPM via a hydraulic wet disc clutch.
Conclusion
With its robust D-239 engine and flexible transmission options, the International Harvester 684 is well-suited for a variety of utility applications, ranging from field cultivation to implement operation, making it a dependable choice for mid-sized farming operations of its era.
Production Information of International Harvester, 684
- Original price was $21,100 in 1984
- Utility tractor
- Built in Doncaster, England
| Manufacturer | International Harvester |
|---|
Dimension and Tires Information of International Harvester, 684
| Utility Wheelbase | 88 inches [223 cm] |
|---|---|
| Low-profile Ground clearance | 10.7 inches [27 cm] |
| 4WD Ground clearance | 17.75 inches [45 cm] |
| Low-profile Wheelbase | 83.75 inches [212 cm] |
| Low-profile Length | 142 inches [360 cm] |
| 4WD Wheelbase | 85.2 inches [216 cm] |
| 4WD Width | 74 inches [187 cm] |
| Row-crop Width | 75 inches [190 cm] |
| Utility Length | 142 inches [360 cm] |
| Row-crop Wheelbase | 84.5 inches [214 cm] |
| 4WD Length | 147.2 inches [373 cm] |
| Utility Width | 74 inches [187 cm] |
| Row-crop Length | 139 inches [353 cm] |
| Row-crop Ground clearance | 17.75 inches [45 cm] |
| Utility Ground clearance | 17.75 inches [45 cm] |
| Low-profile Width | 78.5 inches [199 cm] |
| Ag front | 7.50-16 |
|---|---|
| Ag rear | 16.9-30 |
Engine Specifications of International Harvester, 684
- International Harvester D-239
- Liquid-cooled
- Diesel
- 4-cylinder
| Oil capacity | 8.8 qts [8.3 L] |
|---|---|
| Displacement | 239 ci [3.9 L] |
| Air cleaner | Dry |
| Bore/Stroke | 3.875x5.06 inches [98 x 129 mm] |
| Coolant capacity | 14.4 qts [13.6 L] |
| Starter volts | 12 |
| Rated RPM | 2400 |
| Power | 69 hp [51.5 kW] |
Transmission Information of International Harvester, 684
Transmission variants 1
- Four synchronized gears in high, low, and reverse ranges.
| Type | Syncromesh |
|---|---|
| Oil capacity | 36 qts [34.1 L] |
| Gears | 8 forward and 4 reverse |
| Clutch | Dry disc |
Transmission variants 2
- The optional Torque Amplifier (TA) provides a clutchless on-the-move shift from direct drive (DD) to a lower TA speed.
| Transmission | Torque Amplifier |
|---|---|
| Oil capacity | 36 qts [34.1 L] |
| Type | Two-speed power shift |
| Gears | 16 forward and 8 reverse |
- 8-speed syncromesh
- 16-speed two-speed power shift
Mechanical Specs of International Harvester, 684
- Two- or four-wheel drive
- ROPS canopy or cab optional
- Power steering
- Independent hydraulic wet disc brakes
Power Information of International Harvester, 684
| Rear PTO | Independent |
|---|---|
| Clutch | Hydraulic wet disc |
| Rear PTO Type | 540 |
Hydraulics Specifications of International Harvester, 684
| Type | Open center |
|---|---|
| Type(optional) | 15.4 gpm (optional) [58.3 lpm] |
| Pump flow | 13 gpm [49.2 lpm] |
| Capacity | 9 gal [34.1 L] |
| Valves | 1 or 2 |
Three-Point Hitch of International Harvester, 684
| Rear Type | II |
|---|---|
| Control | Position and draft control |
| Rear lift | 3600 lbs [1632 kg] |
Electrical System of International Harvester, 684
| Ground | Negative |
|---|---|
| Charging amps | 45 |
| Battery volts | 12 |
Where it sits
With 69 HP, the International Harvester 684 sits between 574 (67 HP) and 685 (71 HP) in International Harvester's range. Its power puts it in the 50th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the International Harvester 684 have?
The International Harvester 684 delivers 69 HP.
What years was the International Harvester 684 produced?
The International Harvester 684 was produced in 1977-1984.
What engine does the International Harvester 684 have?
The International Harvester 684 is powered by a Diesel, 4-cylinder engine.
What transmission does the International Harvester 684 use?
The International Harvester 684 uses a Syncromesh transmission.
Is the International Harvester 684 4WD?
The International Harvester 684 is available in 2WD/4WD.