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The hub-centric locating method of maintaining wheel concentricity with the hub itself allows the use of the shoulder nuts.
On many lighter cuty vehicles and rigs the cone nuts perform both a clamping and centering role.
Oil bath hubs are a long time commercial set-up seen on the front axles of heavy duty trucks. My International 4400 had oil bath on it's steers and those hubs with 10k on that axle never got as warm as my trailer hubs did with far less weight on each axle.
A very good move going to these types of ideas that have been time proven on heavy duty equipment for years.
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Sandra, Bruce
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