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International Harvester 743
The
International Harvester 743 is a 2-wheel drive or 4-wheel drive farm tractor.
This model was manufactured between 1981 and 1985. The International Harvester
743 is equipped with a 239 cubic inches (3.9L) IH D239 four-stroke four-cylinder
direct injection naturally aspirated liquid-cooled diesel engine with a rated
power of 67 hp (50 kW) and 235 Nm (173 lb-ft) of maximum torque at 1600 rpm.
The Synchron transmission consists of a dry clutch and 2-speed
powershift gearbox with 16 forward and 8 reverse gears. Max travel speed
(forward/reverse): 18.6 mph (29.9 kph) and 10 mph (16.1 kph).
The open center hydraulic system includes a gear pump with a rated
capacity of 7.9 gal/min (29.9 l/min). The hydraulic pressure is 167 bar
(2450 psi). The 2-wheel drive models are equipped with 7.50x16 front
tires and 16.9x30 rear tires. The 9.50x24 front tires and 16.9x30 rear
tires are used for tractors with 4-wheel drive. The wheel base is 87.7
in (2220 mm) for 2WD models and 86.6 in (2190 mm) for 4WD models.
| Engine Model |
International Harvester D-239 |
| Engine Type |
4-stroke, 4-cylinder liquid-cooled diesel |
| Number of Cylinders |
4 |
| Displacement, cu in (L) |
239 (3.92) |
| Engine Bore, in (mm) |
3.87 (99.0) |
| Engine Stroke, in (mm) |
5.06 (129.0) |
| Aspiration |
Natural |
| Rated Engine Power, hp (kW) |
67.0 (50.0) |
| Rated Engine Speed, rpm |
2300 |
| Maximum Torque, Nm (ft-lbs) |
235 (173) |
| Torque Speed, rpm |
1600 |
| Compression |
15:1 |
| Fuel System |
Direct injection |
| Fuel Tank Capacity, gal (L) |
28.0 (106.0) |
| Oil Capacity, qts (L) |
9.5 (9.0) |
| Coolant Capacity, qts (L) |
18.5 (17.5) |
| Electrical System Rating, Volts |
12 |
| Charging System |
Alternator |
| Alternator Rating, Amps |
55 |
| PTO Operational Type |
Independent |
| PTO Horsepower, hp (kW) |
55.8 (41.4) |
| PTO Clutch Type |
Hydraulic |
| PTO Speeds, rpm |
540 |
| Transmission Type |
Synchron |
| Gearbox Type |
16F/8R, 2-speed powershift |
| Number of Forward Gears |
16 |
| Number of Reverse Gears |
8 |
| Clutch Type |
Dry disc |
| Maximum Forward Speed, mph (kph) |
18.6 (29.9) |
| Maximum Reverse Speed, mph (kph) |
10.0 (16.1) |
| Drive Wheels |
2WD/4WD |
| Steering Configuration |
Front Steer |
| Steering System |
Hydrostatic power |
| Brakes Type |
Hydraulic wet disc |
| Front Tire Size (2WD) |
7.50x16 |
| Rear Tire Size (2WD) |
16.9x30 |
| Front Tire Size (4WD) |
9.50x24 |
| Rear Tire Size (4WD) |
16.9x30 |
| Front Tread, in (mm) |
52.9-73.1 (1340-1850) |
| Rear Tread, in (mm) |
58-77.7 (1470-1970) |
| Hydraulic System Type |
Open Center |
| Implement Pump Flow, gpm (Lpm) |
7.9 (29.9) |
| Hydraulic Capacity, gal (L) |
3.2 (12.1) |
| Hydraulic Pressure, Bar (psi) |
167 (2450) |
| Number of Standard Remote Valves |
1/2 |
| 3-Point Hitch Category |
2 |
| Standard Lift Capacity at lift pin, lb (kg) |
6945 (3150) |
| Wheelbase (2WD), in (mm) |
87.7 (2220) |
| Wheelbase (4WD), in (mm) |
86.6 (2190) |
| Length, in (mm) |
148.8 (3780) |
| Height (Cab), in (mm) |
103.2 (2620) |
| Ground Clearance, in (mm) |
21.9 (550) |
| Turning Radius, in (mm) |
178 (4500) |
| Weight (2WD), lb (kg) |
6850 (3115) |
| Weight (4WD), lb (kg) |
7720 (3510) |
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| Farm Tractors Technical Specifications |
