Replacement Grease Seal for Boat Trailer Hub

Question:

The new rear seal on my boat trailer hub is loose in the hub. Should I be worried about bearing failure? If I need a new hub, will your company have one for me? The hub is a six lug even pattern. The inner bearing number is LM48548 and the outer is M12648.

asked by: Guy G

Helpful Expert Reply:

The grease seal in the back of your hub should be a snug fit; otherwise grease could escape and leave your bearings without sufficient lubrication. You should be able to find a part number on the grease seal itself to help you locate the correct replacement. The seal's outer diameter should be a snug fit with the hub's inner bore. You can measure the rear hub bore with a caliper like # PTW80157 to determine the correct outer diameter for the seal; and you can measure the spindle where the seal rides to find the required seal inner diameter.

Please refer to the linked diagram that shows the point on a spindle where the seal rides, point B, which will tell you the required inner diameter for the new seal. You can then use the linked seal page to check for one with the correct inner and outer dimensions.

We do not offer any hubs that use your same bearing set. New hubs must use the same bearings in order to ensure they will fit on your spindles.

expert reply by: Adam R