Case IH 3688 Tractor Parts

3688 parts and accessories

The Case IH 3688 tractor, manufactured from 1981 to 1984, was a popular choice for farmers needing a reliable utility tractor. Powered by a 82 HP International Harvester DT-358 diesel engine, it delivered ample power for various field tasks. With a PTO horsepower rating of approximately 72, the 3688 offered the muscle needed to handle implements such as rotary cutters, balers, and planters, making it a versatile workhorse.

The Case IH 3688 was introduced as part of the '88 Series' tractor lineup, known for its modern styling and improved operator comfort compared to previous models. Production spanned from 1981 to 1984. The heart of the 3688 is an International Harvester DT-358 diesel engine, a 358 cubic inch (5.9L) inline 6-cylinder engine producing approximately 82 horsepower. Transmission options included a synchronized gear transmission with 8 forward and 4 reverse speeds, offering a good range for different field conditions. The tractor boasted a PTO horsepower of around 72, available in both 540 and 1000 RPM configurations. The hydraulic system delivered approximately 17 GPM of flow, powering up to two remote valves. The 3-point hitch was a Category II hitch, offering a lift capacity of around 4,300 lbs. Common farming applications included row crop work, hay production, livestock operations, and light tillage. Distinguishing features of the 3688 include its robust engine, synchronized transmission, and improved hydraulic capacity compared to smaller models in the Case IH lineup, making it a well-rounded utility tractor.

Specifications

Engine	International Harvester DT-358 82 HP 358ci Diesel
PTO HP	72 HP @ 540/1000 RPM
Transmission	Gear 8F/4R
Hydraulics	17 GPM, 2 remotes
3-Point Hitch	Category II, 4300 lbs
Fuel Capacity	35 gallons
Weight	7,665 lbs
Years Produced	1981-1984

Maintenance Tips

Change your engine oil and filter every 250 hours of operation using a high-quality oil that meets or exceeds manufacturer specifications.
Regularly inspect and maintain your hydraulic system, checking for leaks and ensuring proper fluid levels. Replace hydraulic filters per the manufacturer's recommended intervals to prevent contamination.
Use clean, high-quality fuel and add a fuel stabilizer during seasonal storage to prevent fuel degradation and keep your fuel system operating at its best.
Before storing your tractor for the off-season, perform a thorough inspection, lubricate all grease fittings, and consider covering the tractor to protect it from the elements.

History & Background

The Case IH 3688 debuted as part of the '88 Series', a significant step forward in tractor design for International Harvester before the Case IH merger. These models brought updated styling and enhanced operator comfort to the IH tractor line. While the 3688 didn't see major redesigns during its short production run, it remains a valued piece of agricultural equipment for its reliability and versatility.