Replaced a leaking line going to my ram last week, and now the drive still doesnt want to go up. It will go up and down fine while at rest, but underway it will not. Could there be air in the lines? How would I go about bleeding the system?

the sys. is self bleeding, you sould not have to do anything but run it up and down a few times, make sure your oil tank is full, if it's not coming up under way either there are lines that got crossed somewhere or the pressure relief valves in the valve body are not working, check your lines for proper routing and then pressure check the sys.