TAV Driven Pulley Locknut Question?

#1
Well I have a new generic TAV. It came with the driven pulley locknut (nylock) loose. Is this an adjustment or should I simply torque it to a certain spec. Or just go ahead and tighten it? Sorry for the newbie question but I did search and came up short. Three letter words like "nut" and "TAV" are hard to get good results searching. Thank You for any help or guidance!
 
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