Trying to install the Airdog 100. Everything was going well until I went to disconnect fuel tank suction connection. I have been fighting this thing for the last three hours. I can push the ear on top in easily, however I can not get the ear on the bottom to push in so I can pull the hose off to put the new hose for the Airdog on. I have considered pulling the bed, but I would also have to pull the gooseneck hitch off, too. I have consulted Chiltons and Haynes manuals, and they say you have to pull the connections to drop the tank. The tank is full of fuel.