If you've ever watched the oil pressure gauge drop or heard that telltale engine knock that means trouble, you know how important clean oil is to your tractor's heart. This filter serves the legendary Ferguson TEF20 "Little Grey Fergie" and Massey Ferguson FE35 - tractors that revolutionized farming in the 1940s and 50s and became some of the most popular small tractors ever built. Whether you're powering a sawmill, baling hay, or working around the farmyard, this filter keeps your engine's oil clean and flowing like it should. What You're Getting 138mm long design that fits the unique oil system requirements of these classic 4-cylinder engines Paper filtration element that captures harmful contaminants without restricting oil flow Built-in bypass valve system ensures oil circulation even if the filter gets restricted, protecting your engine from oil starvation Direct replacement for original equipment - no modifications or adapters needed Built for Classic Farm Work These 20-horsepower workhorses handled everything from plowing small fields to powering sawmills and hay balers. The tractors this filter serves were workhorses of British agriculture, commonly used for field cultivation, hay making, livestock management, and mixed farming - today they're highly valued by collectors and small-scale farmers who appreciate their simple, reliable design. Made to Last The paper filtration medium provides excellent contaminant removal efficiency while maintaining proper oil flow rates for vintage engine designs, with quality construction that ensures reliable performance throughout the recommended 200-hour service interval. This filter is specifically engineered for the lower oil pressures and flow rates typical of 1950s-1960s tractor engines. Installation Notes Install with the engine cool and oil drained to working level - always replace the gasket and hand-tighten an additional three-quarters turn after gasket contact. Change your oil and filter every 200 operating hours to keep these vintage engines running strong. Always verify your specific tractor model and engine serial number compatibility before installation, as some early and late production models may have different specifications.