I attached the process on how to get the pulley back on. If you don't have this tool then you can probably rent it from a parts store in most cases. Unfortunately these have to be pressed on. Just don't try to hammer it on because that will bend or break something and then you will have to replace it.
Let me know if you have other questions. Thanks.
Images (Click to enlarge)
Thursday, August 1st, 2019 AT 8:28 PM