The New Holland 89850608 Thresher Speed Switch is an OEM component designed for accurate monitoring and control of thresher speed. This essential switch ensures optimal performance and safety in New Holland TR series combines, including models TR70, TR75, TR85, TR86, TR87, TR88, TR95, TR96, TR97, and TR98. It is also compatible with 1800 and 1900 series forage harvesters, such as 1880, 1890, 1895, 1900, and 1915 models. Manufactured to New Holland's specifications, this switch provides reliable operation for agricultural machinery.