13 Maintenance 13.5 Engine 67089 Fit a suitable hose on the drain cock (1). Place the end of the hose into a container. Open the drain cock (1) carefully. The pressure inside the system is relieved and the coolant escapes. 1 23478 44 1 45 29585 Slacken off cover (1) to the stop and relieve the excess pressure. Unscrew cover (1). 1 Any possible vacuum in the system is relieved, the remaining coolant flows out of the drain tap. Bolt on cover (1). Close drain tap. from serial no. ... 29602 46 1 up to serial no. ... 23479 47 298 00 0293 210 2 - BA DOMINATOR 150/140/130 - 12/09