Brake Master Cylinder for Massey Ferguson 300 Series LHM Mineral Oil System SKU: QT6792R

When your brakes start feeling spongy or you notice green fluid dripping from the master cylinder, it's time for a replacement. This brake master cylinder is specifically designed for late-model MF 300 series tractors that use LHM mineral oil - not your typical brake fluid. Getting the right cylinder means the difference between reliable stopping power and brake failure when you need it most.

Why the Right System Matters

• Specifically designed for late-model MF 300 series tractors that use LHM mineral oil - critical for proper seal compatibility
• Precision-machined cylinder bore ensures smooth piston movement and consistent brake pressure
• These tractors were built when farming meant heavy loads and long days, and reliable brakes aren't optional
• A repair kit is available separately (part 4630) for rebuilding existing cylinders if the casting is still good

This brake master cylinder fits late Massey Ferguson 300 series tractors including models 340, 342, 350, 352, 355, 360, 362, 365, 375, 390, 390T, 398, and 399. These are the models with serial numbers after V39466 (approximately 1987 and later) that require the specialized LHM mineral oil system. S&H Parts has the expertise to help you identify the right brake system for your specific 300 series model.