How to Correctly Pre-Load New Trailer Hubs

Whenever you install new hubs or new bearings and races into an old hub, you should pre-load the trailer bearings.  It is very important that this is done to avoid catastrophic damage to the hub or trailer.  When a hub is not preloaded the races are not seated properly in their machined stop points in the hub. This will allow the trailer hub to move around on the spindle after a few miles and scar the spindle and/or the hub may even come off the trailer completely.

To help with the pre-loading procedure for new trailer hubs or newly installed trailer races Champion Trailers has provided a “How To” for the everyday trailer owner to follow.

Please feel free to contact our technical department at 1.800.229.6690 or generalsales@championtrailers.com if you have and questions or concerns. 

Pre-Loading Trailer Hub and Bearings 101

Step 1:  To pre-load the trailer hub, install the spindle washer and spindle nut onto the spindle with the hub and bearings in place after the trailer hub has been packed with grease.

Step 2:  Tighten the spindle nut finger tight (until snug) and then with channel-lock pliers or a crescent wrench, tighten the spindle nut another 1/4 turn or about 15 to 20 ft pounds of torque.

Step 3:  Now turn the hub ten to 15 revolutions. This will fully seat the races to their machined stop points in the trailer hub

Step 4:  Now loosen the spindle nut very loose, and then re-snug to finger tight, and engage the nut retaining device (some reverse lubricating spindles use a tab washer for the retaining device).

 

Be aware that the nut retaining device (tang washer, tab lock washer, or cotter pin) are a one time use device.  Never reuse these items!  All retaining devices can be purchased at http://www.championtrailers.com/trailer-spindle-accessories/

* Champion Trailers will not be held liable for incorrect preloading or installed trailer races or hubs*

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