I Have a Diplomat ADP 8322 Dishwasher,?

When the arm in the bottom rotates the water it keeps catching on the pipe that passes from the top of the dishwasher to the bottom. It keeps popping out as the clip that secures into the holes has worn. It is a shaped pipe from the top of the dishwasher along the back and into two holes at the bottom, I believe it is what passes the water between the top and bottom arms?