2350 fuel pump tappets

[simon999]

I removed head of fuel pump . My engine which was assembled april 2014 already had steel plungers. But since I opened head ai put new plungers and barrels.
When I took old tappets they had brass pins and they pressed inside
   
The new tappets are different they have black hardened steel pin. That pin is not pressed in so I can push out with my fingers.

   
Question is when tappets move in the pump that pin slide and do any damage in the pump? Cause it is not pressed in or have a snap ring on the side