Try posting this in the Case forum too, I believe the 1212 DB and the 1210 Case are the same tractor... The only thing I can think of (and don't take my word on it, I've never worked on either brand) would be if you have a diverter valve or something similar to send power to your remotes, it could be malfunctioning (leaking through the spools) or in the wrong position. Unless (if it's like the Massey's), you've had the lift cover off, in which case the levers that actuate the valve body on the pump could be in the wrong spot. They can be a PITA to get back where they belong