they weren't working well, more like barely, when i got 1750. Got new discs, took apart. seals are all good no leaks, Actuator plates, old disc were glazed pretty good. Took 3M mini green corp 36grit  disc, sanded actuator surfaces and outer cover surfaces  real good to rough up (break glaze), then hit them with 3M brown roloc disc to remove sharpness from sanding. Applied CRC stalube brake synthetic Moly grease to balls, and some in bottom of wells. Reassembled, did rough adjust, worked real good, reset adjustment after driving. Love those brakes!!! Gonna need them to no till seed on hills, bit heavy tiller is.