I recently ordered part number 19590023B, which is a replacement cylinder assemble from ProItalia. I received it today and it looks to me like it has a pressed in seal where the thrust bearing should be. Does anyone have any experience with this? It is blue seal and if you look where the mushroom should go you will see a seal lip. I do not dare reassemble it with the new part, I doubt it would last 30 seconds and could possible cause my piston to spin in the cylinder. Any and all help is appreciated.


I will be posting photos of my original piston, my spare, and my new OEM replacment.