Today were going to review part number 8-257-5UC3-EZ. This is the Dexter Trailer Hub and Drum Assembly for 2000 lb axles with electric brakes. This part does come with the inner and outer bearings, in this case it will be the same part number, L44649. It comes with the part number 10-9 grease seal. It comes with the five 1/2-inch cone seat lug nuts and the E-Z lube grease cap that fits on the outer edge of your hub there. And the reason this is an E-Z lube grease cap is because the center is actually a rubber plug that can be removed to gain access to the zerk fitting when you grease your spindle.
Now this application will fit most 2000 lb axles with the 1 and 1-1/6 spindles. It is for use with the 7-inch by 1-1/4 inch electric brakes only. The drum dimension on this is 7 inches by 1-3/4 wide and the bolt pattern is 5-lug on 4-1/2 inches. And to give you a few measurements on this, I need to mention that the bearing races are included also but they do come pressed in the hub. All of our hub and drum assemblies will come with the races already preinstalled.
The outer race would be right here. The inner race would be right in there. And let me give you the measurements. The drum size is 7 inches which we measured inside to inside would be 7 inches. The bolt pattern is 5-lug on 4-1/2 inch and the way to determine that is on a lug pattern that is an odd number of lugs like in this case five.
All you would need to do is measure from the center of one lug to the center of the lug right next to it. Either direction would work. So in this case if we measure it will be 2-5/8 inches. And if you look on the chart on the product page for this part number it would show you that the bolt pattern would be 5 on 4-1/2 inch bolt pattern. And that should do it for the review on part number 8-257-5UC3-EZ..
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.