| Manufacturer | International Harvester |
| Price | 21,100(USD) |
| Model | 684 |
| Equipment Type | Utility Tractors |
| Factory | Doncaster, England |
NEBRASKA TRACTOR TEST 1314 2
| Description | Diesel 8-speed 2WD May 24 - June 4, 1979 Link: Nebraska Tractor Test 1314 file PTO performance Drawbar performance Gear 1H used for power test Gear 2L used for pull test |
| Power at rated engine speed | 62.52hp / 46.6kW |
| Fuel use | 4.1gal/hour / 15.5l/hour |
| Power at rated PTO speed | 58.75hp / 43.8kW |
| Max power | 54.56hp / 40.7kW |
| Max pull | 6858lbs / 3110kg |
INTERNATIONAL HARVESTER 684 POWER
| Engine | 69hp / 51.5kW |
| Drawbar (claimed) | 55.9hp / 41.7kW |
| PTO (claimed) | 62.5hp / 46.6kW |
| Plows | 4 |
| Drawbar (tested) | 54.56hp / 40.7kW |
| PTO (tested) | 62.52hp / 46.6kW |
ENGINE DETAIL
The International Harvester 684 is equipped with a D-239 diesel engine, featuring a displacement of 3.9L and generating 69hp at 2400 RPM, which provides a good balance of power suitable for moderate agricultural tasks. Its dry air cleaner aids in maintaining engine cleanliness but may require more frequent checks in dusty conditions. With oil and coolant capacities of 8.8 qts and 14.4 qts respectively, routine maintenance for optimal performance and longevity is crucial, particularly during extended operations.
| Description | International Harvester D-239 diesel 4-cylinder liquid-cooled |
| Displacement | 239ci / 3.9L |
| Bore/Stroke | 3.875x5.06inches / 98x 129mm |
| Power | 69hp / 51.5kW |
| Air cleaner | dry |
| Rated RPM | 2400 |
| Starter volts | 12 |
| Oil capacity | 8.8qts / 8.3L |
| Coolant capacity | 14.4qts / 13.6L |
INTERNATIONAL HARVESTER 684 ENGINE
The International Harvester 684 features a robust 3.9L 4-cylinder diesel engine, known for its reliability and efficiency in agricultural operations. Key advantages include moderate fuel consumption and a sufficient power output for medium-duty tasks, making it suitable for tilling or hauling loads. However, challenges may arise in terms of parts availability due to its age, necessitating a thorough assessment of the machine's overall condition before purchase.
| Description | International Harvester 3.9L 4-cyl diesel |
TRANSMISSIONS OVERVIEW
The International Harvester 684 features an 8-speed syncromesh transmission combined with a 16-speed two-speed power shift, providing versatile gear options for varying field conditions. The syncromesh design facilitates smoother gear changes, reducing operator strain and wear on components. However, the complexity of a two-speed power shift may pose maintenance challenges, particularly in agricultural settings where reliability is crucial.
| Description | 8-speed syncromesh 16-speed two-speed power shift |
TRANSMISSION 1
The International Harvester 684 features a syncromesh transmission with 8 forward and 4 reverse gears, enhancing ease of shifting during operation. Its dry disc clutch offers durability but requires careful maintenance to prevent slippage, especially in challenging agricultural conditions. With an oil capacity of 36 quarts, ensuring timely oil changes is crucial for optimal performance and longevity of the tractor's drivetrain components.
| Type | syncromesh |
| Gears | 8 forward and 4 reverse |
| Clutch | dry disc |
| Oil capacity | 36qts / 34.1L |
| Description | Four synchronized gears in high, low, and reverse ranges |
SPEEDS 1
| Description | With 16.9-30 rear tires |
TRANSMISSION 2
The International Harvester 684's two-speed power shift transmission with 16 forward and 8 reverse gears enhances operational efficiency, allowing seamless transitions via the Torque Amplifier (TA), which enables shifting without clutch engagement. The 36-quart oil capacity ensures optimal lubrication and cooling, vital for maintaining sustained performance under heavy loads. Key advantages include improved maneuverability in varied terrain and reduced operator fatigue, but reliance on the TA may increase maintenance complexity and potential failure points over time.
| Transmission | Torque Amplifier |
| Type | two-speed power shift |
| Gears | 16 forward and 8 reverse |
| Oil capacity | 36qts / 34.1L |
| Description | The optional Torque Amplifier (TA) provides a clutchless on-the-move shift from direct drive (DD) to a lower TA speed |
SPEEDS 2
| Description | With 16.9-30 rear tires |
MECHANICAL
The International Harvester 684 features a versatile 4WD option, enhancing traction and stability for varied field conditions. Its independent hydraulic wet disc brakes provide reliable stopping power, particularly beneficial in wet or muddy environments, while the power steering enhances maneuverability. The available 8-speed syncromesh and 16-speed two-speed power shift transmissions allow for efficient load handling and versatility in speed control, making it well-suited for both agricultural and industrial applications.
| Chassis | 4x2 2WD/4x4 MFWD 4WD |
| Steering | power |
| Brakes | independent hydraulic wet disc |
| Cab | ROPS canopy or cab optional |
| Transmissions | 8-speed syncromesh 16-speed two-speed power shift |
CAPACITY
| Fuel | 20gal / 75.7L |
| Hydraulic system | 9gal / 34.1L |
HYDRAULICS
| Type | open center |
| Capacity | 9gal / 34.1L |
| Valves | 1 or 2 |
| Pump flow | 13gpm / 49.2lpm 15.4gpm / 58.3lpm (optional) |
TRACTOR HITCH
| Rear Type | II |
| Control | position and draft control |
| Rear lift | 3600lbs / 1632kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Clutch | hydraulic wet disc |
| Rear RPM | 540 |
INTERNATIONAL HARVESTER 684 TIRES
The International Harvester 684 tractor features a front tire size of 7.50-16 and rear tires of 16.9-30, providing a balanced weight distribution for improved traction and stability in agricultural applications. The larger rear tires enhance flotation on soft soil conditions, making it ideal for tillage and planting tasks. However, the narrower front tire may lead to reduced stability on steep terrain, requiring careful operation in hilly fields.
| Ag front | 7.50-16 |
| Ag rear | 16.9-30 |
DIMENSIONS
| Utility Wheelbase | 88inches / 223cm |
| Row-crop Wheelbase | 84.5inches / 214cm |
| 4WD Wheelbase | 85.2inches / 216cm |
| Low-profile Wheelbase | 83.75inches / 212cm |
| Utility Length | 142inches / 360cm |
| Row-crop Length | 139inches / 353cm |
| 4WD Length | 147.2inches / 373cm |
| Low-profile Length | 142inches / 360cm |
| Utility Width | 74inches / 187cm |
| Row-crop Width | 75inches / 190cm |
| 4WD Width | 74inches / 187cm |
| Low-profile Width | 78.5inches / 199cm |
| Utility Ground clearance | 17.75inches / 45cm |
| Row-crop Ground clearance | 17.75inches / 45cm |
| 4WD Ground clearance | 17.75inches / 45cm |
| Low-profile Ground clearance | 10.7inches / 27cm |
INTERNATIONAL HARVESTER 684 WEIGHT
| Utility Shipping | 5720lbs / 2594kg |
| Row-crop Shipping | 5970lbs / 2707kg |
| 4WD Shipping | 6765lbs / 3068kg |
| Low-profile Shipping | 5620lbs / 2549kg |
| Ballasted | 9660lbs / 4381kg |
INTERNATIONAL HARVESTER 684 HEIGHT
| Utility Steering wheel | 63inches / 160cm |
| Row-crop Steering wheel | 63inches / 160cm |
| 4WD Steering wheel | 63inches / 160cm |
| Low-profile Steering wheel | 56.5inches / 143cm |
| ROPS | 100inches / 254cm |
DIMENSIONS & TIRES
The International Harvester 684 tractor, with a utility wheelbase of 88 inches, offers stability for various agricultural tasks, while its lighter row-crop incarnation (84.5 inches) enhances maneuverability in tighter spaces. Weighing between 5,620 to 6,765 pounds, this tractor provides a solid foundation for pulling power, although careful consideration of tire selection (7.50-16 front, 16.9-30 rear) is crucial for maximizing traction and minimizing soil compaction. The versatility in wheelbase configurations allows users to adapt the tractor for different applications, ensuring optimal performance in diverse farming scenarios.
| Utility Wheelbase | 88inches / 223cm |
| Row-crop Wheelbase | 84.5inches / 214cm |
| 4WD Wheelbase | 85.2inches / 216cm |
| Low-profile Wheelbase | 83.75inches / 212cm |
| Weight | 5620 to 6765 pounds |
| Front tire | 7.50-16 |
| Rear tire | 16.9-30 |
684 SERIAL NUMBERS
| Location | Front axle support on right side of tractor |
| 1978 | 501 |
| 1979 | 1687 |
| 1980 | 3533 |
| 1981 | 6037 |
| 1982 | 8001 |
| 1983 | 8512 |
ELECTRICAL
| Ground | negative |
| Charging amps | 45 |
| Battery volts | 12 |