WhichTractor
  • Rigid chassis
  • WhichTractor size: Utility
  • No lab test on file
  • 1980–1989
  • 1,735 built

It was ranked on an engine power figure whose source does not say gross or net. WhichTractor size, not the maker’s category

Derived by WhichTractor from a sourced three-point linkage. How we decide what a machine is

International Harvester 743 specs: hp, weight, years

IH D-239 four-cylinder diesel. The manufacturer claimed 66 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.

Engine power, claimed · gross or net not stated

66 hp

49 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “IHC 743”, claimed

This is the maker’s own figure, measured at the engine. Power at the PTO is lower — by how much, for this machine, nobody has measured.

Weight
6,349 lb
3-point lift
6,947 lb
Hyd. flow
7.9 gpm
Top speed
18.6 mph

International Harvester 743 specs: key facts

  • The International Harvester 743 was built from 1980 to 1989.

  • The International Harvester 743 has a claimed engine power (gross or net not stated) of 49 kW (66 hp); it has no measured PTO figure.

  • The International Harvester 743 was offered in two-wheel-drive and four-wheel-drive versions.

  • The International Harvester 743 has a IH D-239 engine, a 4-cylinder 3.91 L diesel unit.

  • The International Harvester 743 weighs 2,880 kg (6,349 lb) unladen.

  • The International Harvester 743 has an independent rear PTO running at 540 rpm / 1000 rpm.

  • The three-point hitch of the International Harvester 743 lifts 3,151 kg (6,947 lb) at the lower-link ends.

  • The hydraulic pump of the International Harvester 743 delivers 30.0 L/min (7.9 gpm).

Source · Traktorenlexikon, “IHC 743”

International Harvester 743 tractor
Photo: joost j. bakker, CC BY 2.0 via Wikimedia Commons · Wrong photo?

How much horsepower does a 743 have?

The only figure for the 743 is 66 hp (49 kW) of claimed engine power, gross or net not stated, no test standard stated — not power at the shaft.

Engine, claimed (gross/net not stated)
66 hp

Source · Traktorenlexikon, “IHC 743”

What engine is in a 743?

A 743 has an IH D-239, a 4-cylinder 3.91 L diesel engine.

Engine — 743 engine specifications
Make & modelIH D-239
Cylinders4, liquid-cooled
Displacement238.7 ci · 3.91 L
Max torque166 lb·ft · 225 N·m @ 1,598 rpm
InjectionDirect injection method
Electrical system12 V

Source · Traktorenlexikon, “IHC 743”

How much will a 743 lift, and what is its hydraulic flow?

A 743 lifts 6,947 lb (3,151 kg) at the lower-link ends.

Hydraulics & PTO — 743 hydraulics and PTO specifications
Pump flow7.9 gpm · 30.0 L/min
Lift at ends6,947 lb · 3,151 kg
Rear PTOIndependent, engine-driven, 540 rpm / 1000 rpm @ 1,920 engine rpmGround-speed PTO available

Source · Traktorenlexikon, “IHC 743”

What transmission does a 743 have?

Transmission specifications for the 743 are below.

Transmission — 743 transmission specifications
ClutchDry dual clutch
BrakesPedal operated dry double disc brake acting on differential side shafts
SteeringHydrostatic ZF steering with common oil reservoir and one double-acting steering cylinder
Top speed18.6 mph · 30 km/h

Source · Traktorenlexikon, “IHC 743”

How much does a 743 weigh?

A 743 weighs 6,349 lb (2,880 kg) unladen.

Weights & dimensions — 743 weights and dimensions
Unladen weight6,349 lb · 2,880 kgtwo-wheel-drive version
Maximum permissible mass12,125 lb · 5,500 kg
Maximum front axle load5,291 lb · 2,400 kg
Maximum rear axle load8,885 lb · 4,030 kg
Wheelbase86.2–87.6 in · 2,190–2,226 mmthe article lists alternatives
Length148.4 in · 3,770 mmtwo-wheel-drive version
Width80.3 in · 2,040 mm
Height100.0 in · 2,540 mm
Ground clearance18.0 in · 457 mmtwo-wheel-drive version
Front track52.9–73.1 in · 1,343–1,856 mmtwo-wheel-drive version
Rear track62.2–78.0 in · 1,580–1,982 mmtwo-wheel-drive version
Turning radius, braked12.1 ft · 3.70 mtwo-wheel-drive version

Source · Traktorenlexikon, “IHC 743”

What oil does a 743 take, and how much?

A 743 engine takes 9.5 qt (9 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.

743 fluid capacities, grades and service intervals
SystemCapacity
Engine oil9.5 qt · 9 LSource: Traktorenlexikon, “IHC 743” · single source, not independently verified
Transmission48.1 qt · 46 LSource: Traktorenlexikon, “IHC 743” · single source, not independently verified
Hydraulic19.0 qt · 18 LSource: Traktorenlexikon, “IHC 743” · single source, not independently verified
Front axle5.5 qt · 5.25 LSource: Traktorenlexikon, “IHC 743” · single source, not independently verified
Cooling system20.6 qt · 19.5 LSource: Traktorenlexikon, “IHC 743” · single source, not independently verified

Always confirm against the operator’s manual for your machine before service.

Which tractors compare with a 743?

Within 10% of its 66 hp of claimed engine power, the same type, and first built within 15 years of it.

Common questions about the International Harvester 743

Is a 743 two-wheel drive or four-wheel drive?

The International Harvester 743 was offered in two-wheel-drive and four-wheel-drive versions.

What PTO does a 743 have?

A 743 has a independent 540 rpm / 1000 rpm rear PTO.

What serial numbers does a 743 carry?

The source prints serial numbers DO3 0165 D 001000 to DO3 0165 D 002971. It does not say whether that is the tractor’s or the engine’s number, and we never work out a year from a serial number.

Sources and how this page was built

Compiled from Traktorenlexikon, “IHC 743”.

Sources checked

14 SEP 2026

Spotted an error?

Sources

Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution

  1. Traktorenlexikon: IHC 743 — CC BY-SA 4.0, WIKIBOOKS-TL-53516 · revision 887174. Wikibooks contributors (Traktorenlexikon). Original document