4430 belt replacement

I need to replace the AC and fan belts on my john deere 4430.  I know I have to take off the hydraulic pump drive coupler, but I'm having issues.  I got the lock nuts off, but the 2 bolts won't come out.  Are they threaded into the coupler?  I tried turning one out and it got really tight.  I was afraid it I might break it.  Any ideas??

Also, are there only 2 bolts?

If I get the bolts out will the coupler just come off, does it slide back and off??

 

Thanks

4430 belt replacement