This hydraulic system gasket seals the joint between two mating surfaces in the hydraulic circuit of the parent combine. It prevents fluid leakage at the connection point, maintaining system pressure and preventing contamination ingress. A degraded gasket causes external oil seepage and a gradual loss of system pressure, which reduces implement response and can allow air entry into the fluid. This component matches the original seal groove geometry, ensuring proper compression when the joint is torqued to specification. Replace the gasket whenever the hydraulic connection is disassembled.