Cummins N14 A/C compressor bolts breaking

I have a Cummins N14 that keeps breaking the a/c compressor pivot bolts. It is the York style compressor. I have replaced the bolts about 4 times in the last month. I've put a new a/c compressor, new accessory drive pully and new belts on. The a/c belt is jumping a lot. I'm out of ideas. Any help would be appreciated.

 

These 2 bolts are the ones that keep breaking. I have tried grade 5 and grade 8 bolts

 

They have shoulders and they fit in the holes pretty easy. I've had the truck for over 3 years and it just started doing this in the last month and I can't get the belt to stop jumping.

 

They are a little lose but not real bad

 

Belt was doing it before the new compressor. I changed the compressor thinking it was bad since the belt was jumping and breaking the bolts but I'm starting to think the compressor wasn't bad. The high side is smooth. I don't have a gauge to check the belt but I can adjust it to where it doesn't jump as bad then after I drive for a little while it starts jumping bad again