International Harvester 743

The International Harvester 743 is a tractor produced by International Harvester. It is equipped with a 238.65 ci 3.9 L engine. The listed engine power is Diesel (listed): 67 hp / 50.0 kW. Transmission: Synchron. Operating weight: 6349 to 7738 pounds.

Engine Power

Diesel (listed): 67 hp / 50.0 kW

Fuel & Capacities

28.0 gal 106.0 L

Transmission

Synchron

Operating Weight

6349 to 7738 pounds

Overview

	1981 - 1985

Production
Manufacturer	International Harvester
Built in Neuss, Germany

International Harvester 743 Engine
International Harvester 3.9L 4-cyl diesel
Fuel tank	28.0 gal 106.0 L
Engine details ...

International Harvester 743 Power
Engine	67 hp 50.0 kW

Mechanical
Two- or four-wheel drive

Hydraulics
Pump flow	7.9 gpm 29.9 lpm

Tractor hitch
Rear lift	6945 lbs 3150 kg

Power Take-off (PTO)
Rear PTO Type	540

Dimensions & Tires
Wheelbase	87.80 inches 223 cm
Weight	6349 to 7738 pounds
Front tire	7.50-16
2WD Rear tire	16.9/14-30
Full dimensions and tires ...

Engine

Engine Detail — 238.65 ci / 3.9 L Diesel

Manufacturer	International Harvester D-329
Fuel Type	Diesel
Configuration	4-cylinder, liquid-cooled
Displacement	238.65 ci 3.9 L
Bore/Stroke	3.875x5.06 inches 98 x 129 mm
Power	67 hp 50.0 kW
Rated RPM	2300

Transmission

Transmission options
8-speed
16-speed

Transmission — Synchron

Transmission	Synchron
Gears	8 forward and 4 reverse

Transmission — 16 forward and 8 reverse

Gears

16 forward and 8 reverse

Dimensions

International Harvester 743 Tires
2WD Standard tires (ag)	Front: 7.50-16. Rear: 16.9/14-30
4WD Standard tires (ag)	Front: 9.5/9-24. Rear: 16.9/14-30

Dimensions
Wheelbase	87.80 inches 223 cm
Length	148.82 inches 378 cm
Height	103.15 inches 262 cm

International Harvester 743 Weight
2WD ROPS	6349 lbs 2879 kg
2WD Cab	6867 lbs 3114 kg
4WD ROPS	7209 lbs 3270 kg
4WD Cab	7738 lbs 3509 kg

Photos

International Harvester 743 tractor photo

Recommended Implements & Sizing Guide

Engineering recommendations for International Harvester 743 based on its 67 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 743.

Estimated Continuous Field Runtime: 8 hrs

Approximately 8 hours of continuous field operation at ~75% rated power on a full tank (28 gal / 106 L).

Estimated 75% Load Fuel Burn~3.5 gal/hr (13.2 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