The Massey Ferguson MF398 tractor, a robust agricultural machine likely produced in the late 1980s to early 1990s, represents a significant offering from a manufacturer with a long and respected heritage in agricultural machinery. Known for their durability and reliability in demanding environments, Massey Ferguson tractors like the MF398 are engineered to provide dependable performance for a wide range of farming operations. This tractor embodies a period of advancement in agricultural technology, focusing on essential functionality and operator efficiency. This comprehensive Factory Service Repair Manual provides complete coverage for the Massey Ferguson MF398 tractor, serving as an indispensable resource for owners and technicians. It details scheduled maintenance, lubrication, filter changes, and adjustments, alongside step-by-step repair procedures and diagnostic guides for all major systems, including the engine, cooling, fuel, powertrain, electrical, and hydraulic systems. With hundreds of pages of information, including detailed illustrations, photos, and wiring diagrams, this manual empowers users to perform everything from basic upkeep to complete overhauls, ensuring the continued optimal performance and longevity of their MF398 tractor.