Grease is Leaking From the Back of the Hub at the Seal Rather than at the Front

Published 04/22/2016

Question:

One of the spindles when greasing the grease comes out around seal instead of outer bearing. New seals ,bearings and race.

asked by: Mark R

Expert Reply:

It is possible that you have single lip seals and need to replace them with double lip seals to avoid the grease leaking from the back of the hub. A double lip seal will have a stronger seal for EZ lube spindles such as # TRU74FR. The force of the grease being pumped in is too much for single lip seals to handle. Also, if using a powered grease gun, whether if it is electric or pneumatic, can also create too much pressure even for a double lip seal.

If you can tell me the seal number you have now I can recommend a double lip seal.

If you have double lip seals already and they leak then it could mean that you have the wrong size seal or it isn't installed straight and flush with the hub, or there could be a problem with the hub itself. My first reaction is that you have single lip seals but if not let me know and we can determine what the problem is.

expert reply by: Michael H