The easiest way to check the ram seal is to pull both of the ram hoses off the 3 way, pull the 3 way hose off the LPR, connect one of ram hose to the LPR. Air up the marker up and if air blows out of the loose ram hose then the seal has failed. You need repeat this for the other side of the ram as in some rams the use a U-cup seals and they may only show a leak in one direction.