ARRANGEMENT IN CONTROL DEVICE OF WORK MACHINE

摘要

A method for removing impurities from a control device of a work machine and a control device. The control device (1) comprises a trackball (4), from which impurities are flushed away. Flushing medium and impurities collected below the trackball are led along a discharge channel outside the control device. The entry of impurities into a component space comprising electronics is prevented. The discharge channel has a collecting cup for collecting impurities and leading them by means of a hose to a connecting part that has a conical mating surface for receiving the hose.