Engine Valve Cotter 3142W004, 4222141M1 Perkins

The Perkins 3142W004 / 4222141M1 Engine Valve Cotter is a genuine AGCO valve train component designed for Perkins 1000 Series and 1100 Series diesel engines. Also referred to as a valve keeper or valve lock, this precision-engineered part secures the valve spring retainer to the valve stem, ensuring stable valve operation under high engine speeds and demanding operating conditions. Manufactured from heat-treated hardened steel, the valve cotter is built to withstand continuous mechanical stress, vibration, and elevated temperatures inside the cylinder head assembly. Its precision-machined locking surfaces provide a secure fit within the valve stem groove, helping maintain proper valve positioning and reliable engine timing throughout engine operation. The Perkins 3142W004 valve cotter plays a critical role in the valve train system by preventing valve spring retainer movement and supporting consistent valve opening and closing cycles. Its durable construction helps reduce wear, improve long-term reliability, and maintain stable engine performance in agricultural, industrial, and power generation applications. Finished with a corrosion-resistant protective coating, this genuine Perkins component delivers dependable durability, accurate fitment, and OEM-quality performance for heavy-duty diesel engines operating in harsh environments.