Questions on M hydraulics

My '46 M has live remote hydraulics courtesy of an M&W pump behind the distributor and a Gresen (Minneapolis) two-position valve (stamped 2701) piped into the original belly reservoir. I've not yet been able to test them, but I'm considering getting a tandem disk and am wondering how things hook up. There are two hoses running to quick-disconnect fittings at the rear of the tractor. Is one a pressure line and one a return? What kind of cylinder should I be looking for to raise the disk? When I pull back on the valve control, the engine lugs; when I push forward, there's no change in engine speed.

Thanks in advance -

For the remote cylinder, the stroke will be determined by the distance disc lift mechanism has to move to provide a complete lift of the disc. The cylinder diameter required will determined by the weight of the disc and by the pressure rating of your pump.

Your local C-IH dealer or Central Tractor can help with valve and cylinder selection. Or if neither are nearby, an industrial fluid power (hydraulics) distributor is also good source of guidance and parts.