You jump on the front forks to center/seat the axle bearing surfaces in the fork legs evenly onto the axle proper.
No other reasons.
The axle pinch bolts and the axle nut must be loose enough to attain this.
Doesn't matter how loose,loose enough to work.
SOP on any bike for me. It ain't science,just a procedure.
Bleed the calipers,farthest(clutch side)side first.
I enjoy the translations in the manual myself....