| Manufacturer |
International Harvester |
| 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 |
INTERNATIONAL HARVESTER 766 POWER
| Drawbar (tested) |
73.37hp / 54.7kW |
| PTO (tested) |
85.45hp / 63.7kW |
ENGINES OVERVIEW
The International Harvester 766 tractor offers a choice between a 4.8L 6-cylinder gasoline engine and a more powerful 5.9L 6-cylinder diesel, catering to various agricultural needs with fuel efficiency and torque characteristics. The gasoline variant may provide quicker starts and smoother operation, while the diesel engine excels in heavy-duty tasks and longevity, making it ideal for larger farming operations. However, diesel maintenance could be more complex and carrying a higher initial cost may be a consideration based on operational requirements.
| Description |
International Harvester 4.8L 6-cyl gasoline/International Harvester 5.9L 6-cyl diesel |
ENGINE DETAIL 1
The International Harvester 766 features a robust C291 gasoline engine with a displacement of 291 cubic inches (4.8L), providing a balance of power and efficiency for medium-duty agricultural tasks. Its dual-stage dry air cleaner enhances engine longevity by minimizing dirt ingress, while the 2400 RPM rated speed allows for effective performance under load. However, this model’s gasoline engine may offer lower fuel efficiency compared to diesel alternatives, which could impact operational costs during prolonged use.
| 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 International Harvester 766 features a robust D360 diesel engine with a displacement of 5.9L, providing significant torque for heavy-duty tasks. Its high compression ratio of 17:1 and rated RPM of 2400 indicate efficiency and power, ideal for agricultural applications or plowing. However, operators should be mindful of maintenance needs for the liquid-cooled system, which can impact operational uptime if not properly managed.
| 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 |
INTERNATIONAL HARVESTER 766 ENGINES
The International Harvester 766 tractor is equipped with two engine options: a 4.8L 6-cylinder gasoline engine and a 5.9L 6-cylinder diesel engine, providing versatility in fuel choice depending on usage. The fuel tank capacity of 37 gallons (140 liters) allows for extended operational time, beneficial for heavy-duty agricultural tasks. However, operators should consider the higher operational costs associated with gasoline engines compared to diesel, which typically offer better fuel efficiency and torque for demanding applications.
| Description |
International Harvester 4.8L 6-cyl gasoline International Harvester 5.9L 6-cyl diesel |
| Fuel tank |
37gal / 140.0L |
TRANSMISSIONS OVERVIEW
The International Harvester 766 features an 8-speed sliding gear transmission complemented by a 16-speed partial power shift, offering enhanced versatility in varying terrain and crop conditions. The dual transmission setup allows for smoother gear transitions and better torque management, advantageous for heavy-duty applications. However, the complexity of the partial power shift may pose maintenance challenges, necessitating regular inspections to ensure optimal performance and longevity.
| Description |
8-speed sliding gear 16-speed partial power shift |
TRANSMISSION 1
The International Harvester 766 features a sliding gear transmission with 8 forward and 4 reverse gears, offering versatile speed options for various agricultural tasks. The dry disc clutch provides reliable engagement, but may require more maintenance than hydraulic systems. This tractor is ideal for moderate to heavy-duty applications, balancing power with manageable gear selection.
| 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 International Harvester 766 features a partial power shift transmission with a Torque Amplifier (TA), enhancing operational flexibility by enabling on-the-go shifting between high and low ranges. With 16 forward and 8 reverse gears, this tractor provides versatile speed control suitable for various agricultural tasks. However, the dry disc clutch may require more maintenance compared to hydraulic setups, potentially affecting performance under heavy loads.
| 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 International Harvester 766 features a 4x2 2WD chassis, which provides less traction in uneven terrain compared to 4WD options, but can offer better fuel economy on flat surfaces. Its hydrostatic power steering enhances maneuverability, particularly beneficial in tight spaces, while the hydraulic dry disc brakes provide reliable stopping power under various loads. The transmission system, with options for 8-speed sliding gear or 16-speed partial power shift, allows for versatile speed management, making it suitable for diverse agricultural tasks, though the lack of an enclosed cab may limit operator comfort in harsh weather.
| 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 |
INTERNATIONAL HARVESTER 766 TIRES
The International Harvester 766 tractor features a robust tire configuration with 9.5L-15 in front and 18.4-34 in the rear, enhancing traction and stability for agricultural tasks. The larger rear tires provide improved load-bearing capacity and reduce soil compaction, making it ideal for heavy tillage or hauling operations. However, users should consider the potential for increased turning radius and maintenance on larger tires in tight field conditions.
| 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 International Harvester 766 features a wheelbase of 102.7 inches (260 cm), providing stability for heavy tasks while enhancing maneuverability in tight spaces. Weighing 10,300 lbs (4,672 kg) and equipped with front tires sized 9.5L-15 and rear tires 18.4-34, it offers a balanced load distribution essential for traction during field operations. However, its weight may pose challenges in soft soils, potentially leading to rutting or compaction, necessitating careful operation in such conditions.
| 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 |
