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Farmall 756

The Farmall 756 is a tractor produced by Farmall. It is equipped with a 291 ci 4.8 L engine. The listed engine power is 76.56 hp 57.1 kW. Transmission: Torque Amplifier. Operating weight: 8,350 lbs 3787 kg.

Engine Power
76.56 hp 57.1 kW
Fuel & Capacities
LP gas
Transmission
Torque Amplifier
Operating Weight
8,350 lbs 3787 kg

Overview

Farmall 756 tractor photo
1967 - 1971 56 SeriesRow-Crop tractor 56 Series Row-Crop tractor
Production
Manufacturer
Farmall (a part of International Harvester)
Row-Crop tractor
The Farmall 756 was not tested at Nebraska, the tests for the Farmall 706 were used.
Variants
IH 756
standard chassis
Farmall 756
row-crop chassis
756 Custom
economy model
Farmall 756 Power
Drawbar (claimed)
68 hp 50.7 kW
PTO (claimed)
76.5 hp 57.0 kW
Drawbar (tested)
67.46 hp 50.3 kW
PTO (tested)
76.56 hp 57.1 kW
Performance test details ...
Mechanical
Two- or four-wheel drive
Steering
hydrostatic power
Independent hydraulic disc brakes
Cab optional with heat and A/C
Tractor hitch
Rear Type
2
Type
IH Fast Hitch
Power Take-off (PTO)
Rear PTO
independent
Rear PTO Type
1000
540/1000
Engine RPM
540@2100
1000@2100
Dimensions & Tires
Wheelbase
105 inches 266 cm
Weight
8,350 lbs 3787 kg
Front tire
6.50-16
Rear tire
15.5-38
Full dimensions and tires ...
Electrical
Charging system
alternator
Charging amps
55
Batteries
1 (gas/LPG)
2 (diesel)
Battery volts
12 (gas/LPG)
6 (diesel)
Battery AH
60 (gas/LPG)
130 (diesel)
References
756 references literature
Farm Loaders published in 1970, by International Harvester
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 1971 Buyer's Guide published by International Harvester
Farmall 756 and 856 Tractors published by International Harvester
Farmall 756 Tractor published by International Harvester
Farm Equipment Reference Catalog published in 1968, by International Harvester
Farm Equipment Reference Catalog published in 1970, by International Harvester
*Publication contains known errors.

Engine

Engine options
International Harvester 5.1L 6-cyl diesel
International Harvester 4.8L 6-cyl gasoline
International Harvester 4.8L 6-cyl LP gas

Engine Detail — 310 ci / 5.1 L Diesel

Manufacturer
International Harvester D-310
Fuel Type
Diesel
Configuration
6-cylinder, liquid-cooled
Displacement
310 ci 5.1 L
Bore/Stroke
3.875x4.375 inches 98 x 111 mm
Air cleaner
dual dry elements
Compression
16:1
Rated RPM
2300
Starter volts
12
Oil capacity
12 qts 11.4 L
Coolant capacity
23.5 qts 22.2 L

Engine Detail — 291 ci / 4.8 L Gasoline

Manufacturer
International Harvester C-291
Fuel Type
Gasoline
Configuration
6-cylinder, liquid-cooled
Displacement
291 ci 4.8 L
Bore/Stroke
3.75x4.39 inches 95 x 112 mm
Air cleaner
dual dry elements
Compression
7.6:1
Rated RPM
2300
Starter volts
12
Oil capacity
9 qts 8.5 L
Coolant capacity
20.5 qts 19.4 L

Engine Detail — 291 ci / 4.8 L LP Gas

Manufacturer
International Harvester C-291
Fuel Type
LP gas
Configuration
6-cylinder, liquid-cooled
Displacement
291 ci 4.8 L
Bore/Stroke
3.75x4.39 inches 95 x 112 mm
Air cleaner
dual dry elements
Compression
7.6:1
Rated RPM
2300
Starter volts
12
Oil capacity
9 qts 8.5 L
Coolant capacity
21 qts 19.9 L

Transmission

Transmission options
8-speed
16-speed two-speed power shift

Transmission — gear

Transmission
gear
Gears
8 forward and 4 reverse
Clutch
dry disc
Oil capacity
68 qts 64.4 L
Four gears each in high, low, and reverse ranges.
With 15.5-38 rear tires.
756 gear speeds

Transmission — Torque Amplifier

Transmission
Torque Amplifier
Type
two-speed power shift
Gears
16 forward and 8 reverse
Clutch
dry disc
Oil capacity
68 qts 64.4 L
The Torque Amplifier (TA) provides a power shift from direct drive (DD) to a lower speed for every gear and range.
With 15.5-38 rear tires.
756 Torque Amplifier two-speed power shift speeds

Dimensions

Farmall 756 Tires
Ag front
6.50-16
Ag rear
15.5-38
Dimensions
Wheelbase
105 inches 266 cm
Length
164 inches 416 cm
Width
92 inches 233 cm
Height (steering wheel)
82 inches 208 cm
Shipping weight
8,350 lbs (diesel) 3787 kg

Tests

Tractor Tests
NTTL 955: 310 diesel Torque Amplifier 2WD
NTTL 956: 291 LP gas Torque Amplifier 2WD
NTTL 957: 291 gas Torque Amplifier 2WD
Nebraska Tractor Test 955
310 diesel Torque Amplifier 2WD November 14 - 28, 1966 Link: Nebraska Tractor Test 955 file
PTO performance
Power at rated engine speed
76.09 hp 56.7 kW
Fuel use
5.0 gal/hour 18.9 l/hour
Power at rated PTO speed
71.84 hp 53.6 kW
Fuel use
4.7 gal/hour 17.8 l/hour
Drawbar performance
Max power
67.46 hp 50.3 kW
Fuel use
5.0 gal/hour 18.9 l/hour
Gear 1-High-Direct used for power test.
Max pull
8,416 lbs 3817 kg
Gear 3-Low-TA used for pull test.
Nebraska Tractor Test 956
291 LP gas Torque Amplifier 2WD November 14 - 28, 1966 Link: Nebraska Tractor Test 956 file
PTO performance
Power at rated engine speed
76.3 hp 56.9 kW
Fuel use
8.4 gal/hour 31.8 l/hour
Power at rated PTO speed
70.98 hp 52.9 kW
Fuel use
7.6 gal/hour 28.8 l/hour
Drawbar performance
Max power
66.53 hp 49.6 kW
Fuel use
8.3 gal/hour 31.4 l/hour
Gear 1-High-Direct used for power test.
Max pull
8,387 lbs 3804 kg
Gear 3-Lo-TA used for pull test.
Nebraska Tractor Test 957
291 gas Torque Amplifier 2WD November 16 - 28, 1966 Link: Nebraska Tractor Test 957 file
PTO performance
Power at rated engine speed
76.56 hp 57.1 kW
Fuel use
6.3 gal/hour 23.8 l/hour
Power at rated PTO speed
71.8 hp 53.5 kW
Fuel use
5.8 gal/hour 22.0 l/hour
Drawbar performance
Max power
65.67 hp 49.0 kW
Fuel use
6.3 gal/hour 23.8 l/hour
Gear 1-High-DD used for power test.
Max pull
8,387 lbs 3804 kg
Gear 3-Low-TA used for pull test.

Photos

Farmall 756

Farmall 756

Farmall 756.

Farmall 756.

Farmall 756.

Farmall 756.

Recommended Implements & Sizing Guide

Engineering recommendations for Farmall 756 based on its 76.56 HP power envelope and ASAE agricultural standards.

Implement & OperationRecommended SizeWorkload RatingEngineering Notes
Moldboard PlowPrimary Tillage
3 to 4 Bottom (16")3 - 4 铧 (40 cm)Heavy DutySuitable for medium loam and stubble turnover.
Rotary Cutter / MowerMowing & Clearing
7 to 8 ft (84-96 in)2.1 - 2.4 mHeavy DutyHeavy-duty twin spindle cutter for overgrown acreage.
Rotary TillerSeedbed Prep
78 to 84 in200 - 215 cmHeavy DutyHeavy commercial tiller with multi-speed gearbox.
Disc HarrowSecondary Tillage
10 to 14 ft Tandem / Offset3.0 - 4.2 m 重型交错耙Heavy DutyAggressive residue cutting in corn/cotton stubble.
Hay BalerHay & Forage
4x4 to 4x5 Round Baler1.2x1.5 m 紧凑圆捆机Heavy DutySilage and dry hay; 540 RPM PTO with slip-clutch.
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for Farmall 756.

Estimated Continuous Field Runtime: 1.6 hrs

Approximately 1.6 hours of continuous field operation at ~75% rated power on a full tank (6.3 gal / 23.8 L).

Estimated 75% Load Fuel Burn~4 gal/hr (15.1 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours

Farmall 756 Specification Unit Converter

Convert power, fluid capacities, and operating weights between metric and imperial standards for Farmall 756.

Converted Equivalents:

Horsepower (HP)76.6 hp
Kilowatts (kW)57.1 kW
Metric Horsepower (PS / CV)77.6 PS

Direct Competitor Comparison

Compare Farmall 756 against same-era industry alternatives in the same horsepower class.

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Engine Power:76.56 hp 57.1 kW
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