International Harvester 684

The International Harvester 684 is a tractor produced by International Harvester. It is equipped with a 239 ci 3.9 L engine. The listed engine power is Diesel (listed): 69 hp / 51.5 kW. Transmission: Torque Amplifier. Operating weight: 5620 to 6765 pounds.

Engine Power

Diesel (listed): 69 hp / 51.5 kW

Fuel & Capacities

20 gal 75.7 L

Transmission

Torque Amplifier

Operating Weight

5620 to 6765 pounds

Overview

	1977 - 1984 84 SeriesUtility tractor 84 Series Utility tractor

Production
Manufacturer	International Harvester
Utility tractor
Built in Doncaster, England
Original price was $21,100 in 1984

International Harvester 684 Engine
International Harvester 3.9L 4-cyl diesel
Engine details ...

International Harvester 684 Power
Engine	69 hp 51.5 kW
Drawbar (claimed)	55.9 hp 41.7 kW
PTO (claimed)	62.5 hp 46.6 kW
Plows	4
Drawbar (tested)	54.56 hp 40.7 kW
PTO (tested)	62.52 hp 46.6 kW
Performance test details ...

Mechanical
Two- or four-wheel drive
Power steering
Independent hydraulic wet disc brakes
ROPS canopy or cab optional

Capacity
Fuel	20 gal 75.7 L
Hydraulic system	9 gal 34.1 L

Hydraulics
Type	open center
Capacity	9 gal 34.1 L
Valves	1 or 2
Pump flow	13 gpm 49.2 lpm
	15.4 gpm (optional) 58.3 lpm

Tractor hitch
Rear Type	II
Control	position and draft control
Rear lift	3600 lbs 1632 kg

Power Take-off (PTO)
Rear PTO	independent
Clutch	hydraulic wet disc
Rear PTO Type	540

Dimensions & Tires
Utility Wheelbase	88 inches 223 cm
Row-crop Wheelbase	84.5 inches 214 cm
4WD Wheelbase	85.2 inches 216 cm
Low-profile Wheelbase	83.75 inches 212 cm
Weight	5620 to 6765 pounds
Front tire	7.50-16
Rear tire	16.9-30
Full dimensions and tires ...

Electrical
Ground	negative
Charging amps	45
Battery volts	12

References

1985 Farm Equipment Buyer's Guide published by CaseIH
1979 Buyer's Guide published by International Harvester
Buyer's Guide 1981 published by International Harvester
Buyer's Guide 1982 published by International Harvester
84 Series Hi-Performers published in 1978, by International Harvester
International Series 84 Utility/Row-Crop Tractors published in 1978, by International Harvester
International Series 84 tractors published in 1982, by International Harvester
International Series 84 Tractors published in 1983, by International Harvester
Agricultural Equipment Reference Catalog published in 1980, by International Harvester

Engine

Engine Detail — 239 ci / 3.9 L Diesel

Manufacturer	International Harvester D-239
Fuel Type	Diesel
Configuration	4-cylinder, liquid-cooled
Displacement	239 ci 3.9 L
Bore/Stroke	3.875x5.06 inches 98 x 129 mm
Power	69 hp 51.5 kW
Air cleaner	dry
Rated RPM	2400
Starter volts	12
Oil capacity	8.8 qts 8.3 L
Coolant capacity	14.4 qts 13.6 L

Transmission

Transmission options
8-speed syncromesh
16-speed two-speed power shift

Transmission — 8 forward and 4 reverse syncromesh

Type	syncromesh
Gears	8 forward and 4 reverse
Clutch	dry disc
Oil capacity	36 qts 34.1 L
Four synchronized gears in high, low, and reverse ranges.
With 16.9-30 rear tires.

Transmission — Torque Amplifier

Transmission	Torque Amplifier
Type	two-speed power shift
Gears	16 forward and 8 reverse
Oil capacity	36 qts 34.1 L
The optional Torque Amplifier (TA) provides a clutchless on-the-move shift from direct drive (DD) to a lower TA speed.
With 16.9-30 rear tires.

Dimensions

International Harvester 684 Tires
Ag front	7.50-16
Ag rear	16.9-30

Dimensions
Utility Wheelbase	88 inches 223 cm
Row-crop Wheelbase	84.5 inches 214 cm
4WD Wheelbase	85.2 inches 216 cm
Low-profile Wheelbase	83.75 inches 212 cm
Utility Length	142 inches 360 cm
Row-crop Length	139 inches 353 cm
4WD Length	147.2 inches 373 cm
Low-profile Length	142 inches 360 cm
Utility Width	74 inches 187 cm
Row-crop Width	75 inches 190 cm
4WD Width	74 inches 187 cm
Low-profile Width	78.5 inches 199 cm
Utility Ground clearance	17.75 inches 45 cm
Row-crop Ground clearance	17.75 inches 45 cm
4WD Ground clearance	17.75 inches 45 cm
Low-profile Ground clearance	10.7 inches 27 cm

International Harvester 684 Weight
Utility Shipping	5720 lbs 2594 kg
Row-crop Shipping	5970 lbs 2707 kg
4WD Shipping	6765 lbs 3068 kg
Low-profile Shipping	5620 lbs 2549 kg
Ballasted	9660 lbs 4381 kg

International Harvester 684 Height
Utility Steering wheel	63 inches 160 cm
Row-crop Steering wheel	63 inches 160 cm
4WD Steering wheel	63 inches 160 cm
Low-profile Steering wheel	56.5 inches 143 cm
ROPS	100 inches 254 cm

Tests

Nebraska Tractor Test 1314
Diesel 8-speed 2WD May 24 - June 4, 1979 Link: Nebraska Tractor Test 1314 file
PTO performance
Power at rated engine speed	62.52 hp 46.6 kW
Fuel use	4.2 gal/hour 15.9 l/hour
Power at rated PTO speed	58.75 hp 43.8 kW
Fuel use	3.8 gal/hour 14.4 l/hour
Drawbar performance
Max power	54.56 hp 40.7 kW
Fuel use	4.1 gal/hour 15.5 l/hour
Gear 1H used for power test.
Max pull	6858 lbs 3110 kg
Gear 2L used for pull test.

Photos

International Harvester 684

International 684 with cab.

Recommended Implements & Sizing Guide

Engineering recommendations for International Harvester 684 based on its 69 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	3 to 4 Bottom (16")3 - 4 铧 (40 cm)	Heavy Duty	Suitable for medium loam and stubble turnover.
Rotary Cutter / MowerMowing & Clearing	7 to 8 ft (84-96 in)2.1 - 2.4 m	Heavy Duty	Heavy-duty twin spindle cutter for overgrown acreage.
Rotary TillerSeedbed Prep	78 to 84 in200 - 215 cm	Heavy Duty	Heavy commercial tiller with multi-speed gearbox.
Disc HarrowSecondary Tillage	7 to 8 ft Tandem Disc2.1 - 2.4 m 对开双排耙	Medium Duty	Field leveling and clod breaking behind plows.
Hay BalerHay & Forage	4x4 to 4x5 Round Baler1.2x1.5 m 紧凑圆捆机	Heavy Duty	Silage and dry hay; 540 RPM PTO with slip-clutch.

Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for International Harvester 684.

Estimated Continuous Field Runtime: 5.6 hrs

Approximately 5.6 hours of continuous field operation at ~75% rated power on a full tank (20 gal / 75.7 L).

Estimated 75% Load Fuel Burn~3.6 gal/hr (13.6 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours