You'll see only two ports on the pump itself. As far as your slide operation goes, when the pump turns clockwise oil is forced out one port ... when turning counterclockwise ... oil is forced out the other. There is a check in the pump that seats when the pump shuts off ... it's that simple ... no directional valves ... no pilot check valves. Here's one Lippert tech sheet found on their website. There are many others.
http://www.lci1.com/images/support/lipsheet/0076.pdf