BYGGMASKIN, SERSKILT TRAKTOR ELLER GREVMASKIN, MED ATMINSTONE EN PENDELAXEL

摘要

In a wheeled vehicle such as an excavator, a pivotable axle for two of the wheels can be locked against pivoting by means of two blocking cylinders each of which is controlled by its own valve. Each valve is closed by venting a control conduit and applying a valve member against a seating, the valve member being subjected to the action of a return spring.