Replacement Hub for Trailer with 84 Spindle Dimensions  

Adding brake mounting flanges to a spindle is something that only a qualified welder with experience welding them on should do. A much easier solution would be to go with a spindle that has a flange mounted to it already like the part #TRU74FR that…

Since your axle diameter is 3 inch that would mean that your axle capacity is between 5.2k and 7k so for a replacement spindle the EZ Lube Spindle part #TRU37FR would fit and work well. This has a 5 bolt spindle though.

I went out to the warehouse to take some measurements of trailer spindle #TRU37FR for you. The stub is actually 3-3/8 inches from the end to the brake flange. It is 3 inches from the end to where the weld is for the brake flange. The brake flange…

If you take a look at the provided photo, you can see the pertinent dimensions of the #TRU37FR spindle.

I do have a hub and bearing assembly that will allow you to replace the hubs on your mobile home axle however, mobile home axles are intended for a one time single use only, therefore there is a limitation to readily available replacement parts. When…

Square axles can be tough to determine capacity. Often times the same spindle fits a range of axle capacities. The best way to determine the capacity is to get the inner and outer bearing numbers stamped into the metal of the bearings like you did.…

The measurements that you are referring to (listed below) are the actual diameter of the axle itself. By shaft size I am guessing you are referring to the spindle? The spindle actually doesn't go all the way through the axle as you can see when…

The #42 E-Z Lube Spindle part #TRU37FR has a brake mounting flange which matches the industry standard of 5 on 3-7/8". I have attached a photo below.

I had our warehouse measure the #84 E-Z Lube Spindle w/ Brake Flange for 3,500-lb Trailer Axle - 1-3/4" Diameter #TRU74FR you were looking at and from the front of the brake mounting flange to the tip of the spindle measures 5-3/8", and…

Mobile home axle components are considered one time use and are mainly all non-standard parts which means that if you attempt to replace anything on them you find that nothing fits or matches. If you went with a new spindle like the part #TRU37FR…

Trailer spindles should only be installed by a qualified fabricator with trailer axle experience who has the necessary equipment to square up a trailer spindle. It's not a project for someone who's pretty good at welding since if the spindle…

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.