How would one install these rivits?

~If the pulley is off the tractor just use a short hydraulic jack inside the pulley to buck the rivet & either heat the rivet on the outside of the pulley & flatten it into the chamfered pulley hole with a flat punch & hammer, or you can do it cold with an air chisel using a flat ended hammer tool.

~If the pulley is still on the tractor you can buck the rivet using a flat piece of steel inside the pulley using 2 C clamps to hold the steel tight to the rivet head & pulley. The rivet can then be flattened using either the heat or air chisel method.

~I have heard of people shortening the rivet slightly then using a welder to weld the rivet into the pulley chamfer but I haven't ever tried that myself. I use the air chisel method with a 5/16" flat ended drift tool & find it looks exactly like a production rivet job..... ....