Larger pics? I only see a thumbnail. If you click on your profile there's a user album where you can upload pictures.
It's labeled pump drive shaft w/cam. You can see how the part at lower right goes into the hole on the pump.NIce photo, but where's the piece that the cam shaft runs up and down? From what I understand that could be the cuprit that causes the metal particles in the fuel supply and then becomes a WMD.
Here is a pic of the piston cup/roller that runs in the aluminum bore and drives the high pressure piston of the high pressure part of the hpfp. When enough aluminum particles from the bore get fouled in the clearance space between the roller and roller mount it causes the roller to fail.No that's not it.
That indeed is the camshaft that drives the pump assembly. The piece I'm looking for has a roller on the bottom that follows the cam up and down.
I think the part must still be in the bore.
BTW, some now think that the shredded particles in VW's HPFP are very similar to the same wear issues in rack and pinion systems that use an aluminum case.