Thank you for your reply, I just read the post and I have one more question before I take my spiral gear to a machine shop to have the part made out. I just took an other picture of the shaft and this is what I have,to the left I have a cone nut, washer and ordinary nut, to the right I have probably missing a cone nut, ordinary nut, washer, fan assembly, washer and a ordinary nut, is the the proper assembly that I have to do when I put everything together.
Merci a lot for your help.