How to adjust the cylinder limiter of freight car dumper

1. First, push the handle of the pneumatic control valve to the "lifting" section, and the compressed air passes through the limit valve to the air cavity of the lifting valve, so that the port P of the lifting valve is communicated with the port C, and the high-pressure oil enters the oil cylinder.

2. Secondly, the cylinder is extended and the car body is lifted. When the vehicle body is lifted to a set angle, the oil cylinder or bracket contacts and pushes the valve stem of the limit valve, and the limit valve works, that is, the compressed air from the air inlet to the air outlet of the limit valve is cut off, the lifting valve keeps the oil cylinder lifted, and the corresponding oil cylinder or bracket is welded on the cylinder base cylinder to further push the valve stem of the limit valve.

3. Finally, the exhaust port of the limit valve is opened, the compressed air from the air control valve of the control air chamber in the poppet valve remains disconnected, the poppet valve is reset to the initial state, and the cylinder stops lifting.