This document provides comprehensive factory service repair information for Massey Ferguson MF3650, MF3655, and MF3660 tractors. Massey Ferguson is a reputable manufacturer with a long heritage in agricultural machinery. These tractor models represent a significant era in their product line, built with an emphasis on reliability and robust engineering for demanding agricultural applications. While specific production years are not detailed, this manual covers the essential knowledge required to understand, maintain, and repair these powerful machines. The purpose of this manual is to serve as an indispensable resource for owners, operators, and maintenance technicians. It offers detailed, step-by-step instructions, technical specifications, and diagnostic procedures for all major systems, including the engine, transmission, hydraulic system, electrical system, and more. With hundreds of pages of factory-trained technician-level content, complete with illustrations and diagrams, this manual empowers users to perform routine maintenance, troubleshoot complex issues, and conduct in-depth repairs, ultimately ensuring the longevity and optimal performance of their Massey Ferguson tractors.