1120 crank assembly nut loosening

Bkpigs

Member
I replaced the seals and a bearing on the crank assembly on my Hesston 1120. Now I cannot keep the 1-5/8 nut tight. I will snug it up and it will run like a sewing machine. When I idle the tractor up the nut will loosen and it will begin to hammer. What am I missing on how to keep it snugged up?
 
never mind. I found the set screw that goes through the pulley that will keep it from backing off.
 

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