Case IH 766 Tractor Parts

766 parts and accessories

The Case IH 766 tractor, manufactured from 1971 to 1976, became a favorite among farmers for its reliability and versatility. Powered by a robust International Harvester engine, it offered around 70 horsepower, making it suitable for a wide range of tasks. With a PTO horsepower of approximately 65, the 766 provided ample power for implements and became a workhorse on many farms.

The Case IH 766 was introduced in 1971 as part of the '66 series, replacing earlier International Harvester models. It was produced until 1976. This tractor was designed to provide a balance of power and economy for mid-sized farms. The 766 was powered by an International Harvester engine, available as either a 291 cubic inch diesel or a 304 cubic inch gasoline engine, both rated at approximately 70 horsepower. The transmission was typically a gear-drive type, offering various speed options including a Torque Amplifier (TA) for on-the-go shifting. The PTO horsepower was rated around 65 hp, available at 540 RPM. The hydraulic system provided ample flow for implements, with a capacity of approximately 14 GPM and options for multiple remote valves. It featured a Category II 3-point hitch, capable of lifting around 3,500 lbs. Common farming applications included row crop cultivation, hay baling, livestock feeding, and light tillage. Compared to the smaller 666, the 766 offered more power and hydraulic capacity. It distinguished itself from the larger 866 by its more compact size and lower initial cost.

Specifications

Engine	International Harvester 70 HP 291 ci Diesel / 304 ci Gas
PTO HP	65 HP @ 540 RPM
Transmission	Gear Drive, Multiple Speed Options (including TA)
Hydraulics	14 GPM, Up to 2 remotes
3-Point Hitch	Category II, 3500 lbs lift capacity
Fuel Capacity	25 gallons
Weight	7,500 lbs
Years Produced	1971-1976

Maintenance Tips

Change engine oil and filter every 125-250 hours, depending on operating conditions, using a high-quality oil meeting manufacturer specifications.
Regularly inspect hydraulic fluid levels and filters, changing the hydraulic fluid every 500-1000 hours to prevent contamination and maintain optimal performance.
Check the fuel system for leaks and ensure proper fuel filtration. Drain any water accumulation from the fuel tank and filter regularly.
Before seasonal storage, thoroughly clean the tractor, lubricate all grease points, and add fuel stabilizer to prevent fuel degradation. Consider storing indoors to protect against the elements.

History & Background

The Case IH 766 was launched in 1971 as part of the International Harvester '66 series, known for their improved operator comfort and enhanced features. While there weren't major redesigns during its production run, the 766 solidified International Harvester's reputation for building dependable and versatile tractors. It remains a significant model in agricultural history due to its widespread adoption and enduring popularity.

Frequently Asked Questions

What engine is in the Case Ih 766?

The Case IH 766 came with either an International Harvester 291 cubic inch diesel engine or a 304 cubic inch gasoline engine, both rated at approximately 70 horsepower.

What is the PTO horsepower on a 766?

The PTO horsepower for the Case IH 766 is approximately 65 horsepower, operating at 540 RPM.

What oil filter fits the 766?

The Case IH 766 typically uses a filter such as a WIX 51773 or equivalent NAPA 1773 for the diesel engine. For the gasoline engine, a filter like a WIX 51068 or equivalent NAPA 1068 is common. Always verify with your parts dealer to ensure proper fitment.

What are common parts needed for the 766?

Common wear parts for the Case IH 766 include engine oil filters, fuel filters, air filters, hydraulic filters, fan belts, hydraulic seals, steering components like tie rod ends, and clutch parts such as clutch discs and release bearings.

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