1.Clockwise Rotate the handwheel at top of the pressure regulator( release the spring of the pressure regulator ). 

2. Slowly counterclockwise rotate the lateral handwheel of the pressure regulator to place in "off" position, at the same time close the oil circuit shutoff valve (clockwise). 

3. Close the second pulse orifice (pay attention to whether the oil pressure is reduced and the low pressure regulating valve is fully opened or not). 

4. Close the primary and the secondary valves of the pulse chamber to the steam pipe.