Today were going to review part number 8-219-4UC3. This is the Dexter Trailer Hub and Drum Assembly with an 8 on 6-1/2-inch bolt pattern for 1/2-inch studs. This trailer Hub and Drum Assembly will include your eight 1/2-inch cone seat lug nuts. It will include the inner bearing, part number 25580, it will include the outer bearing part number 14125A, it will include the grease seal which is a 2-1/8 inch diameter grease seal, and will also include the grease cap which goes over the hub right there. Now the bearing races are included also. They are already installed, pressed into the hub.
There is the outer, and when I spin this around youll be able to see the inner race right there. The application on this Hub and Drum Assembly will fit the 5200 to 7000-lb Dexter axles. It has a drum dimension of 12 inches by 2 inches wide. The stud diameter for the wheel studs is 1/2 inch. The bolt pattern is an 8 lug 6-1/2 inch pattern.
Now the capacity on this Hub and Drum assembly is 3500 lbs. So when this one is used with another Hub and Drum Assembly on the other side of the axle it will give you the max of 7000 lbs. I do want to give you a few dimensions. The bolt pattern which we mentioned is 8 lugs 6-1/2 inch. So basically the way you would measure that is on a Hub and Drum that has an even amount of lugs which in this case would be eight, you just take one or pick any of the studs and measure from the center of that to the one directly across from that.
So if you go from center to center it will be 6-1/2 inches and that will give you the 8 lug 6-1/2 inch bolt pattern. The other dimension I would want to give to you is the drum size. It is 12 inches. Thats the measurement of the inner of the drum. And then the width will be 2 inches.
So this Hub and Drum assembly will work with 12-inch by 2-inch brake assemblies. And that should do it for our review on part number 8-8-219-4UC3.
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.