How To Determine The Correct Hub/Drum Assembly Based on Spindle Size

Question

Question:

I am looking to install electric brakes on my 2012 Carson Flatbed trailer. I am interested in the Dexter brakes, item #23-468-469. I was looking at Hub/Drum assembly item #84546UC3-EZ which fits a #84 spindles my question is: how do I determine which spindle my trailer has? Thank you

asked by: Larry N

1

Helpful Expert Reply:

To determine your spindle size, you can either pull one hub off your trailer and look at the bearing numbers on the face of the inner and the outer bearing, or you can measure the spindle itself.

I've attached an article and a photo to assist. If you measure the spindle, you will want to use a digital caliper like # PTW80157 because the precise measurement in the locations where the bearings sit and where the seal sits will determine the correct spindle size.

Once you have the spindle measurements or bearing sizes, we can confirm a hub/drum assembly for your trailer.

expert reply by: Jason S

1

click to enlarge

Answer 1

Hello Mike. It sounds like you are wanting to add electric brakes to your boat trailer that currently has no brakes. This is possible, but you will first need to make sure that your axle is equipped with a brake flange at the base of the spindle. The…

view full answer...

Answer 2

I do have an option for you but we no longer carry 10 x 1-3/4" brake assemblies. I recommend upgrading to 10 x 2-1/4" brakes as this is the more common size for 3,500 lb axles and will provide greater stopping power. For a set of 10 x…

view full answer...

Answer 3

We do have the regular Dexter Axle brakes and their Nev-R-Adjust equivalents. The regular (manually adjusted) brakes that you are wanting are listed as part #23-26 for the Left Hand side and part #23-27 for the Right Hand side. Their Nev-R-Adjust…

view full answer...

Answer 4

First you will need to remove the old hydraulic equipment. Remove the surge coupler or actuator, remove all the lines, and finally remove the brake assemblies. If you have 10 inch diameter hub and drums, you may need to replace those as well. If you…

view full answer...

Answer 5

You can refer to the linked photo that shows how to measure both the diameter and depth of a boat trailer hub/drum. When selecting new hubs there are several characteristics you need to match up to ensure compatibility. Those are weight rating (to…

view full answer...

Answer 6

The spindle dimensions are as follows: A is the mounting dimension, B is the seal dimension, C is the inner bearing surface, D is the outer bearing surface and E is the diameter of the threaded portion of the spindle for spindle nut selection. Say…

view full answer...

Answer 7

I have attached a chart you can check out that describes the torque needed per wheel size, wheel stud size and material. For an 8-inch wheel with a 1/2-inch wheel stud the torque is 75 to 86 ft-lbs. For a 15 inch steel wheel with 1/2 inch wheel studs…

view full answer...

Answer 8

Trailer wheel bearings are specific to the spindle that is installed on the axle that is on your trailer. You will need to safely support the trailer, remove the wheel and tire, remove the grease cap, remove the cotter pin and washer that secures the…

view full answer...

Answer 9

The BTR and BT8 denotations refer to the spindle, not the trailer hub. The difference between a BTR and BT8 spindle is that the BTR spindle uses a 1.063" diameter L44649 bearing and the BT8 spindle uses a 0.99" diameter L44643 bearing. In…

view full answer...

Answer 10

I am not 100 percent sure what you are asking but it sounds from what I can gather that your bearings don't fit? If that is indeed the case then you need to ensure you have the right size bearings, and there are only two ways to accomplish that.…

view full answer...

Answer 11

We have a slightly larger diameter (3-1/8 inch) endcap that's constructed of TPR , part #YR135-5Y. This endcap is designed for a 5/8 inch shaft. We don't have a blue 2-3/4 inch TPR endcap that's compatible with a 5/8 inch shaft.

view full answer...

Answer 12

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

view full answer...