844 Hydraulics Course Notes — Page 33

The fluid in chamber C is therefore obliged to pass through the dash-pot which slows down the fluid movement, which in turn slows down the movement of the slide-valve. Thus the slide-valve will not move to the « exhaust » position unless there is a positive effort on it for a certain period period of time. No correction occurs for small rapid wheel movements. Movement of the slide-valve from the « exhaust » position to « cut-off ».