Replacement Hub for Single-Axle Trailer with 5-on-4-1/2 Bolt Pattern Using L44649/L68149 Bearings

Question:

Im rebuilding a used trailer I just purchased. Its a single axle calkins I think and my hubs look rusted compared to the rest of the trailer. The spindle, bearings, races, and bearing buddies are all in great shape, but the hub is somewhat rusted and I need new bearing seals. Im debating if I should replace the entire hub/bearing assembly, or just buy new seals and run the hubs longer. I cant find any part # on the hub or seals, but the bearing part #s are L44649 and L68149. Can you please guide me which product options I have as far as either the hub assembly unit, or just the seal? I cant find which hub I need to buy knowing only the bearing numbers. Bolt pattern is 5x4.5 205/75/14 Thanks!

asked by: Ryan

Expert Reply:

Since your trailer is used and you may not know the level of routine maintenance it received from the previous owner I do suggest you replace your hubs, bearings, races and seals to ensure that everything is new and in good working order. This will prevent the awful possibility of having to pull things apart in the near future because one item has suddenly decided to fail. If everything is new you know you have a good service life ahead of you.

If you do want to replace just your inner grease seal you can find the correct part either by finding the original part number on the grease seal or by measuring your spindles at the point where the seal rides. You will also need the seal's outer diameter where it fits into the hub bore. Please refer to the linked diagram of a spindle and note location "B"; this is where the seal rides. You will need to measure with a precision caliper to 3 decimal points. Part numbers' locations are also highlighted in the diagram. I have linked you to our main page for grease seals where you can search based on the seal's dimensions. If you find a part number on your original seal you can search our site with that.

If you want to replace the hubs as I recommend you will need to know your axle's rated capacity; this should be noted on a sticker or plate on the axle. With that and your bearing numbers and bolt pattern you can use the filters on the page to narrow the results to those hubs with all the correct attributes.

For example, if your axle is rated for 2000-lbs and uses hydraulic drum brakes you can use Titan hub # T1544500042. If a 3500-lb axle you could use Dexter # 84546UC3.

For reference I have linked a helpful article concerning how to re-pack your bearings.

expert reply by: Adam R