Tried the gravity bleed but it was not working. Went out and got a hand pump kit. It had no real instructions. It explained what the kit did but did not say how to use it. So I did my best and ended up getting fluid to to to calipers but it was mixed with air for a long time. I did not think that there was that much air in those little lines. I did all the calipers the same way and then did a really big gravity bleed. I raised the tungue up about 6 feet. When I cracked open the bleeders I had no air for 15 minutes . That was on each one. So I think the hand pump was working but I was drawing air out through bleeder valve threads. Got it all together and ran some tests and everything looks good. Tires lock up in reverse with out the power connected. Pulling the boat tomm. Hope all is well. It is a long drive home.