This comprehensive hydraulic valve O-ring seal kit (3907028M91) is specifically engineered for Massey Ferguson tractors, covering series from 5400 through to 7600. The kit includes 11 precisely manufactured seals and O-rings in various sizes, designed to service both manual and electric auxiliary hydraulic distributors. The red silicone O-rings, ranging from 2 cm to 3.5 cm in diameter, are crafted to maintain their integrity under high-pressure conditions, while the included metal washers provide essential spacing and support. Each component is manufactured to exact specifications, ensuring proper sealing and optimal hydraulic system performance. The complete kit weighs 50 grams and comes packaged in a compact 15 cm x 10 cm x 2 cm container. Perfect for maintaining your tractor's hydraulic system efficiency and preventing fluid leaks, this kit contains all the essential seals needed for a complete hydraulic valve service. Whether performing routine maintenance or repairs, this seal kit helps ensure your equipment operates at peak performance.