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How to Identify Correct Replacement Bearings and Seals for Boat Trailer


Hello, I am going to change the bearings on my boat trailer. What do I need to do or to provide to insure that I purchase the correct parts? Thank you.


Helpful Expert Reply:

Replacing your boat trailer's wheel bearings and seals is easiest if you pull one of the hubs and remove the inner and outer bearings and grease seal. The part numbers for these items usually appear as shown in the linked photo, and knowing the part numbers is the surest way to know you have selected the correct replacement parts. If you cannot get the part numbers please let me know and I will give you help with how to measure the spindles and hubs for the parts' sizes.

We offer individual bearings, races and seals and also kits that include the most popular combinations. The linked page displays all such items. And the article included for you provides a table that shows the most common bearings, races and seals based on the axle's weight rating; this can usually be found on a sticker on the axle itself.

When you re-pack your bearings you will want to remove as much of the old (and potentially contaminated) grease as possible from the hub interior and spindles. This will also allow you to inspect the spindle for any signs of heat-related damage.

A bearing installation kit like # PTW83020 will make it easier to get the new parts in place; please refer to the linked video for illustration. Packing them with fresh grease is easiest if you use a packing tool such as # ALL647646. Use marine-grade wheel bearing grease like # L54FR.

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