All right, this quick little video is on something that comes up really really often in the field and there's sort of the beginner side of it and then there's a more advanced side. The beginner side is technicians who are new, forgetting to connect the side of their hose with the core depressor onto a Schrader core and so they're, not pulling vacuum or they're, not getting any pressure through and charging a recovery. And it's really important that new technician pays attention to which side of the hose has the core depressor on the hose itself. The next thing is thinking about the depth of the core depressor and a lot of texts.

Don't know that sometimes you can adjust that depth either by turning counterclockwise or clockwise, that the quarter press are on the inside of the hose or by pulling it in or out with needle nose, that's another technique and then and then finally, how to replace the seals On your hoses, which is quite easy, but there's a nice little tool that I'm going to show you how to use and finally, the inner workings of a core max core and what to do. If you run into one of those, especially if you want to pull a vacuum, so pressing in cores, is actually a little more complicated than a lot of technicians give it credit for so this is a core depressor. That's inside of a quarter. Inch is sort of typical, easy connection, port, which is really a flare.

This is what a typical port is. You have the rubber seal around here and then on the inside. That's your quarter, president and the same thing with these, but these two are a little different with how the core depressor works on the inside you'll notice. If I take this Court remover tool, which is this is the little yellowjacket seal tool, but it's got a courtroom over here.

If I take that - and I put it on here - turn it squeaks a lot, but it doesn't come out. If I take this one here and I turn it just keep twisting until comes out and what you'll notice is, if you look really close that these threads, these little ridges are tapered like threads. I should say you see: they've got a little angled home, whereas if I take this guy out and I got ta - pull it out with needle nose which it's nice to use, I use these new backs really really neatly same needle nose. I pull this guy out.

You notice that it still has ridges, but the ridges aren't angled. You can see it better if I show the two next to each other, seeing the one on the left is angled, the one on the right is just straight in so these are two different types of quart removers and they both work with these typical. You know Richie, Yellow Jacket, rubber seals. That seems, like almost everybody uses, if you're going to be working either in pressure or vacuum, with quarter-inch hoses, where you're going on to the port and you're not going to remove the course.

The typical way to do it would be to use cord oppressors or cord oppressors in the ends of the quarter inches, but there is another option, which is this type of cord oppressor. This is the Anka tools, blue vac cord oppressor. When you turn it counterclockwise, it pulls that depressor in and then, when you're ready to push in the core, then it moves inward and depresses the core. Just so that you know exactly what we're talking about, I'm going to show you what a quarter looks like.

I'm sure you've probably already seen before, but a core has a very low internal volume. They can move through it. So when you open that it's just a tiny little orifice, they can make it pass there so pushes through the top here and then flows that way. When this is unsealed by being pushed in, and so you can push it in further using the quarter pressure like this or even use the one on the hoses now, I want to show you quickly here this little tool, because this is a neat little thing.

I keep this in my bag and it's got extra seals in it, but it's also got this hook, so I'm going to go ahead and just replace one of the seals on here. So you can see what that looks like it's got this hook here see this one, the other one actually both of these feels pretty good, but we'll just replace this one just for the sake of it. So you can take this in here and then you kind of twist it kind of hooks it out there. We go so that one's a little bit worn and that's what it looks like with no seal in it and no border press redness.

Let me put a new seal in and then you can use the backside of this to help press it in so now, let's press it in and then on this one. This is the one that you just force into place, and one thing to consider with these, and this comes up a lot is whenever you have a hose or a tool that is having a lot of loss when you take it on and off it's often because This cord oppressor is sticking too far out, so if the quarter press are sticking too far out kind of like, let's give an example here. So if I put this one in this little guy in and I leave it sticking out too far, what will happen? Is it will start to depress the Schrader before the seal is engaged so it'll start to depress that freighter here and open that up before the seal has a chance to engage, and you get a lot of leakage when you take it on and off so what You want, is you want your core depressor in as far as it can go, while still doing the job of actually depressing the core? So like that, right there that's in pretty pretty far, and so that's likely to still do the job of pushing the core and once you tighten it all the way down, but it won't engage too early or late or disengage too late, which is going to reduce Your leakage, so that's a pretty handy thing now. Another thing is I'm going vacuum you'd like to get your cores out and so a lot of people who use core remover tools and they'll come across.

Sometimes these types of cores. This is called a core max core and this type of core can't be removed with the typical core remover. It's actually threaded in place now, some guys, don't like these enough that they'll, actually just you, know, make a new port, so if they can remove the core, but one thing is interesting about these: is they have much greater internal volume? You'll have to back this out. So that when I depress this, it opens with a much greater volume than what you would get if you were going through a Schrader.

So if you're going to be pulling a vacuum on a system with a core man, you can use these court oppressors and without having to remove the core completely and you'll, still get a very fast vacuum in comparison with the system that has some old Schrader quarters. Like these ones here, hopefully, that's instructive. How to replace the seals the way to set your core depressors further in as far as you can, while still doing the job of depressing the cores for allowing refrigerant flow and what to do. If you run across one of these core max cores, because again the biggest mistake that I see going to make as it relates to all this is trying to use a hose.

That does not have a core depressor on a core and then that won't work at all. You won't get any flow unless you have some way of pushing down on that core. Hey thanks for watching this video. Hopefully that helps you know what to do.

If you need to replace your seals, how to prevent refrigerant loss by getting your core depressor in the right spot and then what to do, if you run into a core max core on a commercial unit, thanks for watching we'll catch you on the next one.