Yep, it should be fairly obvious. Getting the old bearing out is sometimes a little difficult. Just be careful putting in the new one. They are not fragile, but are easier dented than the big tapered roller wheel bearings.
I have changed a lot of those bearings over the years. They are not especially heavily loaded and should last a long time, but didn't on my truck and my friend's trucks.
The problem is with the seals. There is just too much lateral movement for the seals to do a really good job. There is no problem with hitting water puddles on the highway, or splashing through potholes in the woods. But as soon as the axle goes under the water more than a couple of inches, the water starts moving in.
Since my equipment spends a lot of time in deep water, that is a problem.
If this is the Jaws Blazer, you should not have a problem with that. Just be sure to pack the bearings with a good waterproof grease like a boat trailer wheel bearing grease, since its not supposed to be greasable without taking it apart.
Another problem with the seals, was the fact that once the water got past the spindle bearings, it would find its way to the hubs and wheel bearings.
I found a solution several years ago. They make a greasing adapter for that spindle. You take the hub off, and screw the adapter onto the spindle using the threads that hold on the axle nuts.
Then you start pumping grease. It takes a few pumps to fill the adapter, then a lot to pump the spindle full around the axle, but eventually the old grease comes out the back side of the spindle.
The advantage to that is not only greasing the spindle bearings, but it leaves the spindle full of grease that blocks the water from migrating from the backside of the spindle to the front.
But, like I say, you don't need that for the Amityville PD Blazer.