Today were going to take a quick look at Dexters Trailer Hub and Drum Assembly part number 845476UC3. This hub and drum has a 5 on 4-3/4 bolt pattern and is designed for use with 3500 lb axles. To measure the bolt pattern since we cant easily go across due to the casting, well just measure from the center of one stud to the center of the next. On this one we get 2-3/4 inches which puts us at 5 on 4-3/4 bolt pattern. The drum has a gross weight capacity of 1750 lbs. You pair it with the opposite side and youll have your 3500 lb axle capacity.
Included with the hub and drum assembly you also find the seal, 5 conical lug nuts, a grease cap, the two bearings L68149 is the inner and L44649 is the outer, and the races already pressed into place inside the bore of the drum. Now on the interior we can measure our drum assembly. On the inside we have about 2-1/2 inches of depth which is right on for our 2-1/4 brake size. Across the drum on the interior well get our 10 inches. So again, this brake drum could be used with 10 by 2-1/4 inch brake assemblies.
And thats it for a quick look at Dexters Trailer Hub and Drum Assembly part number 845476UC3.
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.