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Today we're gonna be taking a look at some vital components for our trailer. Specifically, bearings, races, seals, and caps.One part of having a trailer is gonna be the maintenance on it, and our bearings are gonna play a crucial part to make sure that we can get from point A to point B safely.Now if you're not quite sure of how to find your bearings, or where exactly they are in your trailer, we'll give you a representation of how to find them.First and foremost, you wanna chalk the wheels and safely support your trailer so you can remove the tire.Next, we can remove the grease cap. That'll be on the front.And behind there, you're gonna find a castle nut and a cotter pin. Now keep in mind, there will be a lot of grease in there, so you may need to wipe some things off, but we can remove the cotter pin, and then we'll unthread the castle nut that's holding everything in place.Now, in some cases, you may not have a cotter pin. It may be a washer that has a tab on it, but in any case, you're gonna be removing that so we can access the bearings inside the hub here.Now, with that, you're gonna pull on the hub, and the bearing in the front will probably fall off, so you're gonna wanna make sure you support it when you pull it out. And in this demonstration, we don't have everything pressed in, but the inner bearing and the seal would come off with it as well, leaving you with just your spindle here.With everything taken apart, now would be a great time to check the spindle.
You wanna make sure that there's no major gouges, because a lot of times when you have an old or damaged bearing, what will happen is it'll ride crooked on the spindle, causing a lot of damage, and we don't wanna have to go through the whole same process again later on. So if you do have any damage, you may need to replace the spindle or the axle itself.Now, when we pulled our hub off, most likely the bearing fell out, but if it did stay inside, you can go ahead and pull the bearing out, and if you look on the inside of your hub, there's gonna be that shiny silver surface. That's gonna be the race. The main purpose of the race is really just so that the bearing has a surface to ride on so that we don't have to worry about the hub being messed up, it's gonna be a replaceable surface.On the backside of the hub, you're gonna have the seal. Now, ours isn't pressed in right now.
It's just sitting in here. So we can give you an idea of how everything looks, but once we get the seal out, you're gonna have the bearing on the inner side, and another race.Now that we've identified our components, let's show you how to find the correct replacements for your trailer.When looking for bearings, all of our bearings are gonna have a number on them. So you're gonna wanna clean it off really well and find the number that's printed on the inside of the bearing. Now, if that's worn off or you can't find it, or it's really hard to read, there is another way to find out what size it is.You're gonna wanna use a digital caliper. That way we can measure the inner diameter of our bearing so we can make sure that it's gonna fit our spindle.
The reason why we're gonna measure the inside diameter of our bearing is because if we look from a side view, it is tapered, but the inside diameter is gonna be a straight shot, and that's what's gonna slide onto our spindle.When looking for a race, it is important to remember that the bearing and race are gonna be matched up. There's no wiggle room where the bearing's gonna be moving around in there, but it still can turn freely.Now, just like our bearings, there is gonna be some numbers printed on our races. Again, if you can't find it, it's worn off or it's too hard to read, instead of measuring the inner diameter, we're gonna be measuring the outer diameter of our race. And the reason why we're measuring the outer diameter is because our race is going to sit inside of our hub, and we need to make sure that it's gonna fit inside the hub bore.When looking for seals, it's not gonna be that easy. We're not gonna have a number that we can go off of.
So again, we're gonna take our micrometer, and we're gonna be measuring both the inner, as well as the outer diameters.Now, the reason for both measurements is because we wanna make sure that the outer diameter is gonna match up to our hub bore on the back, so that the seal can seat in there nicely. And the reason for the inner diameter measurement is because we wanna make
