Somewhat disappointed

The pulley is riveted with some weird rivets. I took a die grinder to them and managed to separate the pulley and expose the bearing but no matter how hard I try I cannot get the "rivets" out of the hub portion. I have tried grinding them off flush, and pounding the living s^&t out of them and they will not loosen up or come out. I guess I will have to bite the bullet. The machine is a later model so I suspect it could be from late mid to late 90's so perhaps anywhere from 20 to 25 years old. I guess if it lasted this long if I go through all this it should last another 10 years anyway. **** at my age I don't even buy green bananas anymore so I am thinking with a little regular care it should be fine for a long time to come. **** it lived it's whole life up until last summer when I bought it mowing close to 2 acres. I only have a half acre so it should be fine. I just hate parting with the coin is all.
Once I have it all done I will flush the cooling system, replace the coolant with fresh, I touched up a couple little rust spots on the deck and sharpened the blades, installed a new belt as well so all should be well there.

Well I have the clutch assembly apart and I think I will be able to use some high quality hardened screws with aircraft nuts plus some loctite stud lock on them to hold the pulley back on to the clutch. I am going to get a second bearing, press it this week and put the machine together
We did have to open the riven holes up just a few thousandths to 1/4" I will post finished photos. Seemed like such a waste to throw out a whole clutch with basically no wear just because of a noisy bearing

So it's all together. I used hardened aircraft grade allen head bolts and hardened aircraft lock nuts along with Loctite blue thread locker. I got to thinking heck the fan is held on by simple bolts no lockers and it stays there. So with the quality of bolts/nuts plus the addition of Loctite Blue I seriously doubt I will ever have an issue plus if I ever have another bearing failure I can still get it apart.
Attached is the finished project. Cost? $10.00 for one bearing and a little time spent at the drill press plus some time pressing old bearing out and new one in. Lots easier to swallow than $250!