International Harvester 856 Tractor

The International Harvester 856 is a 1967-1971 row-crop tractor with a 95 hp claimed diesel PTO rating and a 6.7 L six-cylinder diesel engine. It is a capable classic for tillage, hay work, and PTO implements where a roughly 100 hp tractor is appropriate.

International Harvester 856 specifications

What the 856 is used for

The 856 has the power and weight for field cultivation, hay equipment, and medium-size tillage work. Its independent PTO and available 540/1,000 rpm speeds broaden implement compatibility.

Two- and four-wheel-drive versions were offered. The open operator station was standard and a cab was optional, so buyer expectations for comfort and weather protection should reflect the individual tractor.

Why the International Harvester 856 stands out

The 856 pairs the 6.7 L diesel with an 8-speed gear transmission or an available 16-speed Torque Amplifier arrangement. Diesel operating weight is listed at 10,290 lb, and the tractor uses a Category II rear hitch and 42-gallon fuel tank.

Buying a used International Harvester 856

On a Torque Amplifier-equipped 856, drive the tractor under load and confirm that both direct-drive and TA ranges engage, pull, and hold properly. Also inspect hydraulic response, PTO engagement, clutch behavior, brake performance, rear-axle condition, and evidence of regular engine and transmission-fluid maintenance.

International Harvester 856 frequently asked questions

How much PTO power does an International Harvester 856 diesel have?

It is rated at 95 hp claimed PTO power; TractorData lists 100.49 hp tested PTO power.

What transmission choices were available on the 856?

An 8-speed gear transmission and a 16-speed Torque Amplifier two-speed power-shift transmission were offered.

Does the 856 have independent PTO?

Yes. It has an independent rear PTO with 540 and 1,000 rpm speeds.

Specifications are commonly cited figures for general reference; exact figures vary by year and serial number, so confirm against TractorData.com and the machine's records. Values and prices of used tractors vary by condition and region. Page updated Aug 4, 2026.

Other International Harvester tractors