friction plates 3.8mm in service limit

steel plates 1.9mm how ever i cant find the service limits in the manual

springs 47.5mm in service limit

my question is what is the size and service limit of the steel plates ?
I don't think there are any service limits as such. Just check to make sure they are not warped or have any Blueing on the surface.steel plates 1.9mm how ever i cant find the service limits in the manual