Description
When your brake pedal starts feeling spongy or you’re noticing brake fluid stains under your tractor, it’s time to take a closer look at that master cylinder. This comprehensive repair kit contains all necessary seals, gaskets, and components to rebuild your brake master cylinder, getting your brakes back to that firm, reliable feel they had when your tractor was new.
What You’re Getting
- Complete seal and gasket set designed specifically for John Deere 40 series brake systems
- Premium materials engineered to withstand the unique demands of agricultural hydraulic systems, including higher operating pressures and extended service intervals
- All necessary components for a complete master cylinder rebuild in one convenient kit
- Direct replacement seals that restore proper hydraulic pressure and eliminate leaks
Built for Real Farm Work
Your John Deere 40 series tractor—whether it’s a smaller 1640 for around the barnyard or a bigger 3640 for serious fieldwork—needs brakes you can count on. These tractors handle everything from loader work to pulling heavy implements across uneven terrain, and reliable stopping power isn’t optional when you’re navigating steep hills with a full manure spreader or making quick stops around livestock.
Made to Last
Brake master cylinders take serious abuse on farm tractors, exposed to extreme temperatures from freezing winter mornings to scorching summer engine heat, but this kit features robust seals that won’t deteriorate from constant pressure cycles or prolonged brake fluid exposure.
Installation Notes
Installation requires brake system disassembly and should only be performed by qualified technicians familiar with hydraulic brake systems. Make sure you have fresh brake fluid on hand – it’s the perfect time to flush the system. Bleeding the system properly after installation is crucial – start with the wheel furthest from the master cylinder and work your way closer.




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