[Snowtractor]

The lunette ring is bolted to this hunk of cast metal and slides back and forth as pulling and pushing of the trailer applies. The crossbar that the hitch is in contact with ,and also attached to with the spring , increases either force or travel (I would have to measure the length of the levers welded to the crossbar ) to push on the hydraulic pump. The spring just keeps the crossbar tight to the end of the lunette ring shaft. And the pump is gone.