The JCB 02912259 is a genuine OEM thermostat designed for JCB Dieselmax engines. This critical engine component ensures optimal operating temperature by regulating coolant flow, opening at 82°C. It is compatible with a wide range of JCB machinery, including 3CX and 4CX backhoe loaders, various Loadall models, Fastrac tractors, and JS series excavators, ensuring efficient engine performance and longevity. This part replaces previous numbers 320/04589 and 320/04589A.