| Manufacturer |
Farmall |
| Price |
13,400(USD) |
| Model |
766 |
| Equipment Type |
Row-Crop Tractors |
| Factory |
Rock Island, Illinois, USA |
NEBRASKA TRACTOR TEST 1094 2
| Description |
Gasoline Torque Amplifier 2WD 4/20/1972 Link: Nebraska Tractor Test 1094 file PTO performance Drawbar performance Gear 1-Hi-TA used for power test Gear 2-Lo-Direct used for pull test |
| Power at rated engine speed |
79.73hp / 59.5kW |
| Fuel use |
7.3gal/hour / 27.6l/hour |
| Power at rated PTO speed |
73.96hp / 55.2kW |
| Max power |
71.32hp / 53.2kW |
| Max pull |
8,841lbs / 4010kg |
NEBRASKA TRACTOR TEST 1117 2
| Description |
Diesel Torque Amplifier 2WD November 10 - December 5, 1972 Link: Nebraska Tractor Test 1117 file PTO performance Drawbar performance Gear 1-Hi-TA used for power test Gear 2-Lo-Direct used for pull test |
| Power at rated engine speed |
85.45hp / 63.7kW |
| Fuel use |
6.1gal/hour / 23.1l/hour |
| Power at rated PTO speed |
85.66hp / 63.9kW |
| Max power |
73.37hp / 54.7kW |
| Max pull |
9,236lbs / 4189kg |
FARMALL 766 POWER
| Drawbar (tested) |
73.37hp / 54.7kW |
| PTO (tested) |
85.45hp / 63.7kW |
ENGINES OVERVIEW
The Farmall 766 tractor offers robust engine options, featuring a 4.8L 6-cylinder gasoline engine, ideal for lighter agricultural tasks, or a more powerful 5.9L 6-cylinder diesel engine, which provides enhanced torque and fuel efficiency for heavier-duty applications. Key advantages of the diesel variant include better fuel economy and longevity, while the gasoline engine may have lower initial costs and simpler maintenance requirements. Consider operational needs, as the gasoline engine is suited for short-duration tasks, while the diesel engine excels in prolonged heavy-duty work.
| Description |
International Harvester 4.8L 6-cyl gasoline International Harvester 5.9L 6-cyl diesel |
ENGINE DETAIL 1
The Farmall 766 features a robust International Harvester C291 gasoline engine, offering a displacement of 4.8L for efficient power delivery. Its dual-stage dry air cleaner ensures optimal engine performance in dusty conditions, while its rated RPM of 2400 provides adequate torque for various farming tasks. However, the gasoline engine may result in higher operating costs compared to diesel alternatives, making it a suitable choice for operations prioritizing lower initial investment over fuel efficiency.
| Description |
International Harvester C291 gasoline 6-cylinder liquid-cooled |
| Displacement |
291ci / 4.8L |
| Bore/Stroke |
3.75x4.39inches / 95x 112mm |
| Air cleaner |
dual stage dry |
| Rated RPM |
2400 |
| Starter volts |
12 |
ENGINE DETAIL 2
The Farmall 766, powered by the International Harvester D360 diesel engine, features a robust 5.9L displacement with a high compression ratio of 17:1, optimizing fuel efficiency and torque at lower RPMs. With a bore and stroke of 98x129 mm, it delivers a balanced performance suitable for heavy-duty agricultural tasks at its rated RPM of 2400. The 12V starter ensures reliable ignition, making it advantageous for cold starts but may pose challenges in extreme low temperatures if battery maintenance is overlooked.
| Description |
International Harvester D360 diesel 6-cylinder liquid-cooled |
| Displacement |
360ci / 5.9L |
| Bore/Stroke |
3.875x5.0625inches / 98x 129mm |
| Compression |
17:1 |
| Rated RPM |
2400 |
| Starter volts |
12 |
FARMALL 766 ENGINES
The Farmall 766 tractor is equipped with either an International Harvester 4.8L 6-cylinder gasoline engine or a more robust 5.9L 6-cylinder diesel engine, offering flexibility based on fuel preferences and operational requirements. Its 37-gallon (140.0L) fuel tank provides extended runtime, essential for long farming operations without frequent refueling, especially when paired with the diesel option for improved fuel efficiency. However, the gasoline engine may deliver lower torque output compared to diesel, making it less suitable for heavy-duty applications.
| Description |
International Harvester 4.8L 6-cyl gasoline International Harvester 5.9L 6-cyl diesel |
| Fuel tank |
37gal / 140.0L |
TRANSMISSIONS OVERVIEW
The Farmall 766 tractor features an 8-speed sliding gear transmission with an optional 16-speed partial power shift, enhancing versatility in varying terrain and crop conditions. The partial power shift allows for smoother gear transitions, improving efficiency during field operations. However, the complexity of the transmission may increase maintenance demands and repair costs, crucial factors for farmers considering long-term ownership.
| Description |
8-speed sliding gear 16-speed partial power shift |
TRANSMISSION 1
The Farmall 766 features an 8 forward and 4 reverse sliding gear transmission, allowing for versatile speed control and maneuverability, particularly in tight spaces. Its dry disc clutch offers reliable engagement and disengagement, but may require more maintenance compared to wet clutches. This combination is ideal for varied farming operations, performing efficiently in both low and high range tasks, though it may present challenges in heavy-duty scenarios requiring frequent gear changes.
| Type |
sliding gear |
| Gears |
8 forward and 4 reverse |
| Clutch |
dry disc |
| Description |
Four gears (1-4) in low and high ranges |
TRANSMISSION 2
The Farmall 766 tractor features a partial power shift transmission with 16 forward and 8 reverse gears, providing versatile speed options for various field tasks. The integrated Torque Amplifier allows for on-the-move shifting between direct drive and low-speed, enhancing operational efficiency, especially during heavy load situations. However, maintaining the dry disc clutch requires attention to prevent slippage issues that could affect performance.
| Transmission |
Torque Amplifier |
| Type |
partial power shift |
| Gears |
16 forward and 8 reverse |
| Clutch |
dry disc |
| Description |
Four gears (1-4) in two ranges (low/high) with the Torque Amplifer (TA) power shift The TA allows a shift-on-the-move between direct drive and a lower speed |
MECHANICAL
The Farmall 766 features a 4x2 2WD chassis, making it ideal for flat terrain and light-to-moderate agricultural tasks; however, it may struggle with traction in hilly or muddy conditions. Its hydrostatic power steering enhances maneuverability, providing operator comfort during extended use. The 8-speed sliding gear transmission, with an optional 16-speed partial power shift, allows for versatile speed control, catering to various field operations while maintaining efficiency and fuel economy.
| Chassis |
4x2 2WD |
| Steering |
hydrostatic power |
| Brakes |
hydraulic dry disc |
| Cab |
Open operator station Cab optional |
| Transmissions |
8-speed sliding gear 16-speed partial power shift |
HYDRAULICS
| Type |
open center |
| Pump flow |
12gpm / 45.4lpm |
TRACTOR HITCH
POWER TAKE-OFF (PTO)
| Rear PTO |
independent |
| Rear RPM |
540, 1000 |
FARMALL 766 TIRES
The Farmall 766 is equipped with Ag front tires (9.5L-15) and Ag rear tires (18.4-34), providing a solid balance of stability and traction in field conditions. The rear tires offer substantial ground contact, enhancing soil compaction control and reducing slip during tillage operations, thereby improving fuel efficiency. However, the tractor's weight distribution may challenge maneuverability in tighter spaces, so consider wheel modifications or tire pressure adjustments for optimal performance in confined areas.
| Ag front |
9.5L-15 |
| Ag rear |
18.4-34 |
DIMENSIONS
| Wheelbase |
102.7inches / 260cm |
| Operating weight |
10,300lbs / 4672kg |
| Ballasted weight |
11,880lbs / 5388kg |
| Front tread |
60 to 84inches / 152to 213cm |
| Rear tread |
56 to 100inches / 142to 254cm |
DIMENSIONS & TIRES
The Farmall 766 tractor features a wheelbase of 102.7 inches, providing stability during field operations, which is advantageous for both plowing and hauling tasks. Weighing 10,300 lbs, its robust structure aids in traction, particularly in heavy soils, although this weight may present challenges in soft or muddy conditions. The front tire size (9.5L-15) and rear tire size (18.4-34) enhance load distribution and enable the tractor to handle a variety of agricultural implements effectively.
| Wheelbase |
102.7inches / 260cm |
| Weight |
10,300lbs / 4672kg |
| Front tire |
9.5L-15 |
| Rear tire |
18.4-34 |
766 SERIAL NUMBERS
| Location |
Left side of clutch housing |
| 1971 |
7101 |
| 1972 |
7416 |
| 1973 |
9611 |
| 1974 |
12378 |
| 1975 |
14630 |
| 1976 |
16840 |
