Control device for raising and lowering of a hydraulically controlled lifting mast of an industrial or forklift truck has an outflow piston manometer that is regulated using a control spring that is controlled by a control element

摘要

Control device in which lifting and lowering is controlled using valves and piston manometers. An outflow piston manometer (ADW) has a load pressure acting on one side and a return flow pressure acting on the other via a control spring (RF) that is controlled by a control element (PK) through a connection to the return flow and outflow side by lowering of the spring force in a neutral position to zero, while being tensioned in a control position.