Removing and Replacing Trailer Spindles

Updated 10/16/2020 | Published 05/26/2011

Question:

I have a question about spindles , I know how to replace hubs on my pontoon trailer. But how do I change the spindles. Do they bolt on or have to be welded to axle. Thanks

asked by: Tiny G

Expert Reply:

To replace a spindle, the old one would need to be cut off, and the new one welded into place. This is NOT a job for the do-it-yourselfer. The new spindle must be absolutely square with the axle in order to prevent premature tire wear and wheel tracking problems. I would recommend finding a welder who is experienced with trailer axles. Your local RV dealer or repair facility could probably refer you.

In many cases, it's less expensive to simply replace the trailer axle itself. We offer a basic selection of replacement 2000 and 3500 lb axles. If you'd care to reply with the following information, I'd be happy to make a recommendation for a replacement axle. I'll need to know the reference numbers off the inner and outer wheel bearings as well as the hub face to hub face dimension and the distance between the spring seats, measured center hole to center hole. I'll provide some diagrams showing how to get these measurements.

expert reply by: Mike L

click to enlarge

Jesse

8/10/2020

Hi! Thank you very much for the feedback, had a quick question for you. Do you know if a machine exists to put together a spindle and an axle? Thanks!

Jon G.

8/21/2020

I wouldn't be surprised if there is a machine out there that does this but I'd imagine it would be more for the manufacturer side of things. If you are looking to replace the spindle on your axle then you're going to need to have a welder come out and do the installation. We recommend making sure the welder has experience with welding on trailer spindles to ensure it's done correctly.

Asifa

10/16/2020

@JonG The old trailer spindle is cut off at behind the oil seal and a new spindle is sleeved into the housing.Using both a shrink fit and plug welds, new chromoly tubing is welded in place.