<ol class="steps">
 	<li>Oil is forced into the right half of the hydraulic cylinder.</li>
 	<li>The piston-plunger assembly moves to the left. Oil is displaced out of the left half of the hydraulic cylinder and the water in the left high pressure cylinder is pressurized.</li>
 	<li>The plunger moves to the left.</li>
 	<li>Once pressure has begun to build, the high pressure water is forced out of the intensifier through the center of the check valve.</li>
 	<li>While the piston-plunger assembly is moving to the left, it is also allowing fresh water to flow into the right high pressure cylinder through the inlet holes of the check valve.</li>
 	<li>When the plunger-piston assembly has reached the end of its stroke to the left, the right high pressure cylinder is now full of water.</li>
 	<li>The directional control valve receives a signal via a proximity sensor near the piston to reverse the flow of hydraulic oil. Oil is now forced into the left half of the hydraulic cylinder and the piston moves to the right.</li>
 	<li>Oil is displaced out of the right half of the hydraulic cylinder while the water in the right high pressure cylinder is pressurized by the right plunger.</li>
</ol>