Note. Never reuse an old washer and hub nut.
Loosen the castle nut of the hub and re-tighten it to a torque of 20 kgf·m, thereby ensuring the preload of the bearing, then tighten the hub nut by 90°.
In case of discrepancy between the hole for the split pin and the slot in the nut, unscrew the nut a little to the nearest slot, lock the hub nut with the split pin.
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