Description

When you hear gear whine getting louder or notice transmission oil pooling under your MF 300 series tractor, chances are a worn range box seal is letting gear oil escape. Nothing kills transmission gears faster than running low on oil, so addressing seal problems before they leave you with expensive gear damage is the smart move.

What You’re Getting

Precision-fit seal designed specifically for the range box in MF 300 series tractors
Quality construction that handles the pressure and temperatures inside your transmission
Direct replacement seal that prevents gear oil leaks and contamination
Proper seal material that resists breakdown from gear oil and temperature cycling

Built for Real Farm Work

This range box gear seal fits the 300 series Massey Ferguson tractors that have been the backbone of farm operations since the 1980s. The 362-375 models were perfect for medium-scale operations, while the powerful 390-399 series handled intensive cultivation, heavy plowing, and large-scale harvesting operations. Whether you’re running a utility model for chores or a big 390 for heavy field work, keeping that transmission properly sealed is essential.

Made to Last

Range box seals deal with constant pressure changes and temperature swings that would destroy ordinary seals. This one’s engineered to handle the tough environment inside your transmission, maintaining a tight seal against gear oil while resisting the heat and pressure that comes with hard work.

Installation Notes

Range box work requires splitting the tractor or significant disassembly, so most operators tackle this during other major service. Clean everything meticulously; any debris will quickly damage new gears. While you’re in there, it’s the perfect time to inspect other transmission components and change the gear oil.