"Tuner are you saying the the 85 ft lb of torque does load the collar/spacer and the inner race of the bearing??"
Yes, it is possible, IF the "stack" of the compressed parts is shorter than the nut will compress all the way down the stack. Some of these nuts have a recess cut into them, to make sure that the stack is tightened all the way with the nut torque spec. IF the stack is just at the distance the nut has to move, and it stacks as well, with a lower crush distance, then, yes, the nut torque will be fine, peer spec, but the parts stack will not have that torque value. This would take the nut hitting the splined area just right to not set torque correctly on the parts stack.
"And yes it was leaking just a bit of fluid through those seals which are being replace. So that may have made it worse???"
Possible on the making it worse if the sprocket and parts weren't tight as they should be, but, from the seal to collar, or, through the O ring on the shaft inside the collar??? BIG difference, seal, messy all over, O ring, will show paths on the sprocket faces that oil has permeated out the splined area, and flung out to the outer diameters of the sprocket, also making oil paths that look like they came from each side of the sprocket. Is there a two line oil path all the way around the sprocket path on the cases??
Simpler, it is a lot like a water hose for the main seal, water all over the place, hose with a round pattern water path being flung out in a circle, water goes out in a circular direction from the center of the wheel on the sprinkler head.
EDIT: I just took another couple of looks on the video, and I don't think the O ring on the shaft is the oil leak, looks more like the seal itself. Also, put the stack back together and leave the locating tab in place on the sprocket, measure the distance from the end of the splines poking out of the washer, and compare them to the relief in the inner side of the nut. Example: stack, .150, nut, .155, or stack .159, and the relief .200, what do you have????
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