The Case International 685 Tractor, produced in the mid-to-late 1980s, represents a robust and versatile piece of agricultural machinery. As part of the esteemed Case International 85 series, this tractor is known for its durable construction and reliable performance, powered by a Case 3.1 Liter diesel engine delivering approximately 60-70 horsepower. Featuring an 8-speed constant mesh gearbox with optional Hi-Lo splitter and a dual-stage dry clutch, the 685 is designed for a wide range of farm tasks. Its engineering prioritizes functionality and longevity, making it a dependable workhorse for farm owners, independent mechanics, and agricultural technicians. This comprehensive service repair manual provides in-depth instructions for the maintenance and repair of the Case International 685 Tractor. It covers all major systems, including engine, transmission, brakes, electrical systems, cooling, fuel, and chassis. The manual details procedures for disassembly, reassembly, troubleshooting, diagnostics, and component replacement, enabling users to perform both basic upkeep and complex repairs independently. Its scope is designed to empower owners and technicians with the knowledge necessary to ensure the continued optimal performance and longevity of their tractor, offering detailed guidance on everything from routine lubrication to intricate system diagnostics.