5/16 STEEL CHECK BALL (Yale YT18361802)

A worn check ball can allow fluid to bypass, reducing system pressure and causing erratic operation. This aftermarket replacement part references Yale catalog number YT18361802. The check ball is a small spherical component that seats against a port to permit flow in one direction only. Its plain mechanical function is to block reverse flow when pressure differential shifts the ball against its seat. A common failure consequence is gradual leakage past the seat, which leads to slow or incomplete actuation of the connected mechanism. In a typical usage context, this ball is installed inside a valve body or pump cavity where it cycles repeatedly under pressure. Verify the serial number or application, then call (562) 693-7748.

Part number variants: YT18361802, yt18361802