International Harvester 523 Overview
The International Harvester 523, built from 1965-1972, uses a 179 ci 2.9 L direct-injection engine with oil-bath air cleaning. Its electric starting is supplied at 12 volts, giving the model a distinctive engine profile.
Drive details include an 8 forward and 4 reverse gearbox and the Agriomatic S partial power-shift option. The rear PTO is independent at 540 (1.375), and the hydraulic system holds 4.3 gal 16.3 L with 7.5 gpm 28.4 lpm pump flow.
Quick Answers
- Engine displacement179 ci 2.9 L, with direct injection.
- Transmission8 forward and 4 reverse, or Agriomatic S partial power shift.
- Rear PTOIndependent, with a 540 (1.375) specification.
- Hydraulic capacity4.3 gal 16.3 L.
Engine and Power
The 179 ci 2.9 L engine uses direct injection, oil-bath air cleaning, and electric starting.
Diesel engine
| Displacement | 179 ci 2.9 L |
|---|---|
| Bore Stroke | 3.875x5.0625 inches 98 x 129 mm |
| Fuel System | direct injection |
| Air Cleaner | oil bath |
| Starter | electric |
| Starter Volts | 12 |
Manufacturer
Manufacture years
Transmission
An 8 forward and 4 reverse arrangement uses a 279.4mm dry disc clutch; Agriomatic S provides a partial power-shift alternative.
8-speed transmission
| Gears | 8 forward and 4 reverse |
|---|---|
| Clutch | 279.4mm dry disc |
Agriomatic S
| Name | Agriomatic S |
|---|---|
| Type | partial power shift |
| Gears | 12 forward and 4 reverse |
PTO and Hitch
The independent rear PTO carries a 540 (1.375) specification, alongside a II/I rear hitch with 3748 lbs 1700 kg lift.
Rear PTO
Rear PTO type
Rear hitch
Rear lift
Hydraulics
Hydraulic capacity is 4.3 gal 16.3 L, with pump flow listed at 7.5 gpm 28.4 lpm.
Capacity
Pump flow
Accuracy Note
Tractor specifications can vary by year, region, factory configuration, installed equipment, and later repairs. Match serial range, engine, transmission, PTO setup, and model code before ordering parts or doing service work.