The JCB ER136574 is a genuine OEM PTO engage switch designed for various JCB Fastrac tractor models, including 3155, 3170, 3185, 3190, 3200, 3220, 3230, 7185, 7200, 7230, 7270, 8250, 8280, 8310, 8330, 8330T, 8330T-4WS, 4160, 4190, 4220, 4220T, 4220T-4WS, 4220-4WS, and 4220-4WS-T. This essential component ensures proper engagement and disengagement of the power take-off system, crucial for operating implements. Weighing approximately 0.05 kg, it is a direct replacement part for maintaining optimal machine functionality.