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Sake lock but?


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I think you mean "stake" vs "sake".  Its intent is to positively keep a retaining nut in place.   Typically a staked nut is used in an application where the consequences of a nut backing off is high or critical - sprocket, drive shaft, etc.  In the internet photo the blue are inspection ("witness") marks, but also illustrate how the shoulder of the nut is bent in to the recess on the driving shaft, usually with a drift, punch or maybe a chisel.  You'll always need a new nut when doing this.  If you look at the one you're working with, you'll probably note it looks similar to this.  If you have not already, you'll need to bend the portion of the nut out of the shaft's recess prior to removal.   The 4th gen FSM does show that staking is required, so it's not something to be overlooked. 

 

image.png.b6f914049058c486f1f584b827286aeb.png

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