A page about the clutch, clutch plates and measurements.
At first the M72 had a single friction plate, but that was changed into double friction plate’s. Probably the friction wasn’t enough for the weight, driving under heavy circumstances in harsh environment. It seems to been used for a very short time! On the drawing there already 2 friction plates.
Pressure plates and end plates seems to be the same for all Ural and Dnepr engines.
Pins are pushed in a bit more, according to tech. drawing they should be, 64.5 minus 20 minus 19 = 25.5