Solution for Replacement Hubs on 1970's Homemade Trailer

Question:

I have an OLD trailer. registered as homemade, from mid 70s. Used only for very lightweight aluminum fishing boat. I want to replace hubs. Using micron i have 1.24 on inner bearing. 1.23 on outer bearing. 1.49 for under grease sleeve? 480x12 inch tires. 5x4.5. 1st question would be what axle number/part number hub do i need? looking for pre-assembled/pre greased. 2nd question: is that small a difference in axle measurement a big concern?

asked by: Mark P

Expert Reply:

Starting with the first question, with or without that variance there are no hubs that use that bearing combination. It is likely an obsolete axle/hub based on the bearings and age of the trailer. This means the only solution would be to replace the axle that uses a modern bearing combination which will allow you to replace the hubs as well.

To find the right replacement axle you will need the axle capacity as well as the length. I would check the axle tag to see if the capacity is listed. For the length you will need the hub face to hub face measurement. See the attached video which shows exactly how to measure.

For example, if your measurement was 89" and you have a 3,500 lb axle you could use the # e65GR. This also comes with hubs that use a 5 on 4-1/2 bolt pattern. It is nice if the spring center measurement matches, but that isn't necessary. You can always cut off the spring seats and weld on # TRSS238 to match what you currently have. The same is true if you have a different capacity axle, but you would need a different spring seat.

Regarding your second question, the 0.01" difference in your measurements is more than likely a slight measuring error. Considering the fact that you will need to replace the axle, hubs, and bearings I wouldn't be too concerned with it.

expert reply by: Robin H