Today were going to review part number 8-219-13UC3. This is the Dexter Trailer Hub and Drum Assembly with the 8 on 6-1/2-inch bolt pattern for 9/16 studs. This trailer Hub and Drum Assembly will include the eight 9/16 cone seat lug nuts. It will include the inner bearing, part number 25580, the outer bearing part number 14125A, the grease cap and the 10-36 grease seal. Now the bearing races will also be included but they will already be preinstalled, as you can see, the outer races right here and the inner races already in there. All of our Hub and Drum assemblies when we ship out will have the races already pressed into the assembly.
Now this application will fit most 5200 to 7000-lb Dexter axles. It has a drum dimension of 12-inch diameter by 2-inch wide. The bolt pattern is 8 lug 6-1/2 inch pattern. The stud size is 9/16. Now the capacity on this assembly is 3500 lbs so when this one is used with one on the other side of the axle it will give you maximum capacity of 7000 lbs.
I do want to give you the few dimensions on here. The bolt pattern which will be 8 lugs 6-1/2 inches on a bolt pattern that has an even number of lugs which in this case would be 8, the easiest way is usually to measure from the center, pick any lug or wheel stud and from the center of that stud to the center of the stud directly across from it. In this case this is pretty high so its going to be hard to get an actual--it is 6-1/2 but its hard to get a good--the other way to get a good measurement is just measure from the center of this stud to the one right next to it, either direction. And its 2-1/2 inches. So basically that would tell you that this bolt pattern is an 8 lug 6-1/2 inch bolt pattern.
The other measurement is the drum dimension which would be 12 inches in diameter and that would measure the inside of the drum which is 12 inches and then the width would be 2 inches. So this Hub and Drum assembly will work with a brake assembly that is 12-inch by 2-inch wide. And that should do it for our review on part number 8-219-13UC3.
First off we will go ahead and take off the dust cap. In this case it is a bearing buddy. Next is taking out the locking pin, the cotter pin that goes through the center here. Once you have that lock washer off, just go ahead and take off the nut and pull your whole hub off. Now we are going to go ahead and inspect the hub and bearings here.
First off, we will take off the hub, then take off the nut on the inside, and we will pop the whole hub off and take it to the workbench and clean it up from there. You can see there is a lot of rust in there, there is a lot of condensation. Basically water got in there through either condensation or a seal leak. We definitely need to take it apart and clean it up. This has whats called a tang washer. Instead of a regular cotter pin that goes up and down, it has a little piece of metal that goes between the notches here and you have to push this back, flat, so you can take off the nut. And the whole thing just slides off. Sometimes if it gets caught on the hub here you can beat it to get it to come loose. We will go ahead and clean this spindle off here, and then we will put our hub back on. Give it a test fit first to make sure it all slides on pretty good and then go ahead and take it back off. What is good is to take a thin layer, it doesnt have to be much just a little bit, to kind of help the parts slide on a little bit more than they used to.
We get many many questions on how to make sure trailer hubs and brakes are safe for travel. Here Joe addresses some of those questions demonstrating how to thoroughly inspect the hubs, breaks and bearings. I know many of us take the performance of these assemblies for granted but if you are planning a long trip or just make short trips around town you should be aware of their condition. I like to say it is time well spent when it avoids break downs on the side of the highway.