• Rigid chassis
  • WhichTractor size: Compact
  • No lab test on file
  • 1966–1974
  • 7,814 built

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 323 specs: hp, weight, years

INTERNATIONAL-HARVESTER DD-111 three-cylinder diesel. The manufacturer claimed 25.6 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.

Engine power, claimed · gross or net not stated

25.6 hp

19.1 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “McCormick 323”, 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
4,136 lb
Hyd. flow
6.6 gpm
Top speed
12.4 mph

International Harvester 323 specs: key facts

  • The International Harvester 323 was built from 1966 to 1974.

  • The International Harvester 323 has a claimed engine power (gross or net not stated) of 19.1 kW (25.6 hp); it has no measured PTO figure.

  • The International Harvester 323 is two-wheel drive (2WD).

  • The International Harvester 323 has a INTERNATIONAL-HARVESTER DD-111 engine, a 3-cylinder 1.83 L diesel unit.Source 2

  • The International Harvester 323 weighs 1,876 kg (4,136 lb) unladen.

  • The International Harvester 323 has an independent rear PTO running at 540 rpm.

  • The hydraulic pump of the International Harvester 323 delivers 25.0 L/min (6.6 gpm).

Source · Traktorenlexikon, “McCormick 323”

How does the 323 compare with its class?

  • Strength:

    A 60 L fuel tank is high for its class — 62% above the median of 37 L across the 100 machines within 10% of its power that hold this figure.

Derived by WhichTractor from 126 comparable records. How we work this out

Illustration of the 1966–1974 International Harvester 323, a 26 hp farm tractor, a drawing generated from its specification record
Illustration — not a photograph

How much horsepower does a 323 have?

The only figure for the 323 is 25.6 hp (19.1 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)
25.6 hp

Source · Traktorenlexikon, “McCormick 323”

What engine is in a 323?

A 323 has an INTERNATIONAL-HARVESTER DD-111, a 3-cylinder 1.83 L diesel engine.

Engine — 323 engine specifications
Make & modelINTERNATIONAL-HARVESTER DD-111Source 2
Cylinders3, liquid-cooledSource 2
Displacement111.4 ci · 1.83 LSource 2
Max torque80 lb·ft · 109 N·m @ 1,480 rpm
Injectionwhirl prechamber injection
Electrical system12 V

Source · Traktorenlexikon, “McCormick 323”

How much will a 323 lift, and what is its hydraulic flow?

Hydraulic and PTO specifications for the 323 are below.

Hydraulics & PTO — 323 hydraulics and PTO specifications
Pump flow6.6 gpm · 25.0 L/min
Pressure3,553 psi · 245 bar
Hitch categoryCategory 1
Rear PTOIndependent, engine-driven, 540 rpm @ 1,780 engine rpmEngages under load
PTO shaft1 3/8" - 6 splines

Source · Traktorenlexikon, “McCormick 323”

What transmission does a 323 have?

Transmission specifications for the 323 are below.

Transmission — 323 transmission specifications
ClutchPedal operated dry Fichtel and Sachs single disc clutch
BrakesPedal operated International Harvester disc brake on differential half shafts
SteeringMechanical Ross steering
Top speed12.4 mph · 20 km/h

Source · Traktorenlexikon, “McCormick 323”

How much does a 323 weigh?

A 323 weighs 4,136 lb (1,876 kg) unladen.

Weights & dimensions — 323 weights and dimensions
Unladen weight4,136 lb · 1,876 kg
Wheelbase71.5 in · 1,815 mm
Length124.6 in · 3,165 mm
Width64.6 in · 1,642 mm
Height56.5 in · 1,434 mm
Ground clearance14.3 in · 363 mm
Front track48.2–73.8 in · 1,225–1,875 mm
Rear track48.2–75.8 in · 1,225–1,925 mm
Turning radius, braked9.4 ft · 2.85 m

Source · Traktorenlexikon, “McCormick 323”

What oil does a 323 take, and how much?

A 323 engine takes 4.3 qt (4.1 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.

323 fluid capacities, grades and service intervals
SystemCapacity
Engine oil4.3 qt · 4.1 LSource: Traktorenlexikon, “McCormick 323” · single source, not independently verified
Transmission35.9 qt · 34.0 LSource: Traktorenlexikon, “McCormick 323” · single source, not independently verified
Hydraulic13.5 qt · 12.8 LSource: Traktorenlexikon, “McCormick 323” · single source, not independently verified
Cooling system7.7 qt · 7.3 LSource: Traktorenlexikon, “McCormick 323” · single source, not independently verified

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

Which tractors compare with a 323?

Within 10% of its 23.5 hp at the PTO as the maker claimed it, with no laboratory test on file, the same type, and first built within 15 years of it.

Common questions about the International Harvester 323

Is a 323 two-wheel drive or four-wheel drive?

The International Harvester 323 is two-wheel drive (2WD).

What PTO does a 323 have?

A 323 has a independent 540 rpm rear PTO on a 1 3/8" - 6 splines shaft.

What serial numbers does a 323 carry?

The source prints serial numbers NT 900.001 to 907.817. 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, “McCormick D-324 Farmall”; and Traktorenlexikon, “McCormick 323”.

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: McCormick 323 — CC BY-SA 4.0, WIKIBOOKS-TL-118068 · revision 1059854. Wikibooks contributors (Traktorenlexikon). Original document
  2. Traktorenlexikon: McCormick D-324 Farmall — CC BY-SA 4.0, WIKIBOOKS-TL-118023 · revision 1056722. Wikibooks contributors (Traktorenlexikon). Original document