Vacum pump pulley bolt?
 

I am changing the Vac pump on my truck, 6.5 and notice there is no bolt in the vacuum pump holding the pulley on? Is this normal, or is it missing?
It doesn't make sense that a press fit pulley has no retainer bolt?
Pete

Normal for there to be an open hole there-the threaded hole is for the removal and install tool only-same as power steering pulley.