Checkboard,
Yes, as others have already pointed out, the 737-300 hydraulic system is indeed different to the 737-200. In fact the 737-200 hydraulics probably share more similarities with the 727 than with the later 737's. ie. System A uses Engine Driven Pumps, System B uses Electric Motor Driven Pumps and a Hydraulic Ground Interconnect joins the two together for ground purposes......
Cheers!
GTG!
