International Harvester 1256

The International Harvester 1256 is a tractor produced by International Harvester. It is equipped with a 406.9 ci 6.7 L engine. The rated power output is 116.12 hp 86.6 kW. Transmission: Torque Amplifier. Operating weight: 9940 to 11030 pounds.

Overview

	1967 - 1969 Standard-tread tractor
1967 - 1969
Standard-tread tractor

Production
Manufacturer	International Harvester
Standard-tread tractor
Built in Rock Island, Illinois, USA
Original price was $10,700 in 1969

Variants
Farmall 1256	row-crop
IH 1256	standard

International Harvester 1256 Engine
International Harvester 6.7L 6-cyl diesel
Fuel tank	42 gal 159.0 L
Engine details ...

International Harvester 1256 Power
PTO (claimed)	113 hp 84.3 kW
Drawbar (tested)	102.03 hp 76.1 kW
PTO (tested)	116.12 hp 86.6 kW
Performance test details ...

Mechanical
Two- or four-wheel drive
Power steering
Independent hydraulic dry disc brakes
Open operator station. Two-post ROPS optional. Cab optional with heat and air-conditioning.

Hydraulics
Type	open center
Valves	1
Pump flow	8 gpm 30.3 lpm

Tractor hitch
Rear Type	III/II

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	1000
Engine RPM	1000@2100

Dimensions & Tires
Wheelbase	105 inches (Farmall) 266 cm
	92 inches (International) 233 cm
Weight	9940 to 11030 pounds
Front tire	10.00-16
Rear tire	18.4-38 (Farmall)
Full dimensions and tires ...

Electrical
Charging system	alternator
Charging amps	55
Batteries	2
Battery volts	6
Battery AH	204

References
Spring 1968 Buyer's Guide published by International Harvester
Summer-Fall 1968 Buyer's Guide published by International Harvester
World Wide Farm Equipment Buyer's Guide published in 1968, by International Harvester*
Spring 1969 Buyer's Guide published by International Harvester
1256 Turbo Tractors published by International Harvester
Farm Equipment Reference Catalog published in 1970, by International Harvester
*Publication contains known errors.

Engine

Engine Detail — 406.9 ci / 6.7 L Diesel

Manufacturer	International Harvester DT407
Configuration	turbocharged diesel, 6-cylinder, liquid-cooled
Displacement	406.9 ci 6.7 L
Bore/Stroke	4.321x4.625 inches 110 x 117 mm
Air cleaner	dual dry elements
Compression	17:1
Rated RPM	2400
Starter volts	12
Oil capacity	15 qts 14.2 L
Coolant capacity	24 qts 22.7 L

Transmission

Transmission options
8-speed gear
16-speed partial power shift

Transmission — 8 forward and 4 reverse gear

Type	gear
Gears	8 forward and 4 reverse
Oil capacity	68 qts 64.4 L
The 1256's transmission provides four gears (1-4) in high, low, and reverse ranges.
With 18.4-38 rear tires.

Transmission — Torque Amplifier

Transmission	Torque Amplifier
Type	partial power shift
Gears	16 forward and 8 reverse
Oil capacity	68 qts 64.4 L
Four gears (1-4) in two ranges (low/high) plus reverse range. The Torque Amplifier (TA) allows a clutchless shift from direct drive (DD) to the lower TA speed in all gears and ranges.
With 18.4-38 rear tires.

Dimensions

International Harvester 1256 Tires
Standard tires (ag)	Front: 10.00-16. Rear: 18.4-38 (Farmall)
	Front: 11.00-16. Rear: 24.5-32 (International)

Dimensions
Wheelbase	105 inches (Farmall) 266 cm
	92 inches (International) 233 cm
Length	164 inches 416 cm
Width	92 inches 233 cm
Height (steering wheel)	86 inches 218 cm

International Harvester 1256 Weight
Shipping	9940 lbs (Farmall) 4508 kg
	11030 lbs (International) 5003 kg
Operating	10405 lbs 4719 kg
Ballasted	13810 lbs 6264 kg

Tests

Nebraska Tractor Test 971
Diesel Torque Amplifier 2WD April 15 - 30, 1968 Link: Nebraska Tractor Test 971 file
PTO performance
Power at rated engine speed	116.12 hp 86.6 kW
Fuel use	7.5 gal/hour 28.4 l/hour
Power at rated PTO speed	113.33 hp 84.5 kW
Fuel use	6.8 gal/hour 25.7 l/hour
Drawbar performance
Max power	102.03 hp 76.1 kW
Fuel use	7.6 gal/hour 28.8 l/hour
Gear 1H-TA used for power test.
Max pull	11,104 lbs 5036 kg
Gear 3L-TA used for pull test.

Photos

1969 International 1256 tractor.

International 1256 with dozer blade.

International 1256 with dozer blade.