On my 06 Ranger I adjusted the rear brake shoes so that there is equal drag on both drums, ( I checked it carefully several times) but the drivers side drum feels warmer than the passenger side drum, after using the brakes. Is it possible that there is air in the passenger side brake line preventing the shoes from pushing out as hard as the drivers side shoes? Thanks

check to see if that sides brake cylinder is receiving brake fluid pressure

pop the bleeder valve open and check

Yes, the passenger side is getting fluid. I bled them twice, but by myself using a plastic vacuum pump, it didn't work real great, it was hard to get the fluid out of any of the lines because I couldn't get a real good seal.

in order to bleed air bubbles out of brake lines , the bubbles need pressure behind them to force them out