Уплотнительное кольцо тормозного поршня бортового редуктора Caterpillar 5393039

The Final Drive Brake Piston O Ring Seal functions as a pressure-retaining sealing element positioned between the brake piston and its bore inside the final drive braking assembly. During brake activation, hydraulic fluid is directed toward the piston, and the seal compresses radially to close the clearance gap and prevent pressure escape. The containment ensures that hydraulic force converts directly into mechanical piston movement. By eliminating internal leakage paths, the seal preserves braking responsiveness and force.Attributes:• Forms a compressed sealing barrier between piston and cylinder bore.• Blocks hydraulic fluid from bypassing the piston during actuation.• Eliminates internal leakage paths within the brake chamber.Applications: The Final Drive Brake Piston O Ring Seal is positioned around the brake piston inside the final drive braking chamber, where it contains hydraulic pressure and enables accurate piston movement during brake engagement and release.