I took off the lead screw, the cross slide, and the apron today. The purpose is to clean it, replace the half nuts, clean the lead screw, etc. The gearbox in apron had some amount of sludge. My friend, who generously spent 2 hours with me working on this lathe, took the apron home to wash it in his big parts washer to get rid of sludge and other crap. The gears and such, however, look to be in good shape.