Vermeer 605J won't start a bale

I have a Vermeer 605J baler that has worked flawlessly for me for the 5 years I've owned it. Put it in the shop this winter and put in all new belts, a bunch of new bearings, and rebuilt the pickup.  Took it out this week to roll up some hay and when you start to drive into a windrow it will pick up the first 5' or so and just cram it in a wad between the pickup, starter roller, and the drum, until the pickup starts to slip. The core never starts to roll. It's always started a bale perfectly in the past.  The belts are routed just like the old ones, the shear bolts in the starter roller are ok. What am I missing??

 

Vermeer 605J won't start a bale