this is the last item to remove before the diffuser
it is a carbon seal so one must take caution not to chip it.
make sure you dont do what i did and removal all of the diffuser to compressor bolts prior to this.Leave atleast 4.
here is all the components that make up the number too bearing and seal.
the bearing housing and pinch plate and seal retainer is getting swopped out for the reworked versions.
this is all about keeping these items cooler