AGCO 731155M1 Engine Valve Cotter

he AGCO 731155M1 Engine Valve Cotter is a precision-engineered valve train component designed to securely lock the valve spring retainer to the valve stem within the cylinder head assembly. Manufactured from heat-treated high-strength alloy steel, this critical engine component ensures reliable retention of the valve assembly under continuous high-speed operation, vibration, and thermal cycling. Operating within the engine's valve mechanism, the cotter creates a secure mechanical connection between the valve stem and spring retainer, preventing unintended movement and maintaining proper valve timing and operation. Its precision-machined tapered profile provides a firm locking action when installed, allowing the valve train to withstand millions of opening and closing cycles throughout the engine's service life. Designed to meet OEM specifications, the AGCO 731155M1 offers dependable performance in demanding agricultural, industrial, and heavy-duty engine applications where durability, accuracy, and long-term reliability are essential.