This video is brought to you by spore'ln quality, integrity and tradition. Today we are back and we are going to go ahead and replace some bearings on this unit to refresh your memory. This unit has some bearings that are just inside. I don't know if you can hear that or not it's in the Bering, it's not necessarily in the mower, it's not in the motor.

I can turn it off. I can hear both bearings grinding right now. It looks like the seals are busted on the bearing too, because the grease is all on the outside, so this is gon na be a chore, because this is a double wheel and the bearings you can't get them out because of the placement you got to take The wheels off so we've got some new parts or going to I got another person here with me today. We've got a bunch of stuff right here.

I went ahead and ordered a new shaft, two bearings and two blower wheels and we'll see what we can get to and what we can get on film. The first thing we have to do is we need to take this whole assembly out. If you've ever worked on these Lennox units, they got two screws right here. The whole thing slides out, but we're not gon na work on it in the unit, we're gon na pull the whole assembly out and set it on some ladders.

So that way we can really get some work on it to make our jobs easier. We're gon na go ahead and take the motor off the unit and lay it down so that we wouldn't have to worry about the weight of the motor, so we're gon na get that disassembled, then we'll pull it out and go from there. So these are nice and that they do slide out. So you can grease the bearings and different things, so that is cool, but so what we're gon na do is unhook electrical to the motor, take the motor set it on top and then go from there.

You got to watch out when you're pulling these out this one's. Had it happen where the wires get pinched. You know it'll rub the wires, so this one's happened on it before so you just got to be careful when you're yanking on these things so but yeah we're gon na unhook the motor all right, we're gon na go ahead and shoot this with a penetrating oil. Get all the stuff lubricated we're not looking at it, but get the oil on there, so it can start doing its work.

We'll definitely sand everything too and clean it. All up we made use some cinder blocks, got the blower assembly out. So now we can better get in here and be able to do everything we need to do. Since we got it apart, we can do a heat, exchanger inspection.

I don't think there's gon na be any problems, good, we'll do a better one later, but everything looks good, so these blower wheels also are very caked with dirt and stuff too so they're gon na get some more airflow by us. Replacing these all right now we're just going to confirm before we start hacking anything up. We already checked the wheel, sighs those were good. We got to check the shaft, sighs, real, quick, make sure that's good and check the bearing size, and then we can start cutting things apart.

So we're going to work on this keyway right here. That's what holds the pulley basically in place and then the set screw keeps us steady so that we doesn't move back and forth. What we're going to do is the picky layout it give it some wd-40 or penetrating oil. I used a medium.

You can get this loose there, you go. You got ta watch out too because, as your allen, wrench starts to go bad you'll think it's coming loose, but really it's just stripping in there. I probably should get a better Alan. This is my tiny one that I keep in my bag.

Don't lose any set screws, save them all okay. So then, what you're going to do is take a set of dikes or wire cutters and try to pinch the key, tight and use leverage to pull down. See it's not working all right, so they don't always work the way I wanted them to. Sometimes you can get those keys out.

I couldn't so. I've got my pulley puller on here and we're just going to go ahead and use the impact and very carefully drive. It off can be difficult, see it's it's not that's why it's like wanting to pull one yeah something's, not even what is it I mean it seems like it's. There we're losing it.

They're gon na try to get a better grip on it straight. Come on over. Here all hold the arms, you get the one behind you. It should be perfect.

The perfect there's that there's that it impact it, we packed it a little bit, make sure that we're stray. We are we're good, okay, let's put some penetrating oil on here, they're right here, I'll try to hold sign it. We got tight man, so we pulled it off with the keys still in there. So now we can get it off clean it up and reuse.

It now that I got the shaft off now. I want to explain something to you. No, this is never a perfect science, I'm sure there's a lot of people watching, saying hey. I would have done this.

I would have done that life happens. You know it's been a while, since I've done any Power Transmission bearing work or anything, we used to do a lot of it, but now that the equipment's gotten so cheap everybody just replaces everything. I was actually surprised. They repaired this one but um so anyways we're just gon na start, disassembling everything there's a very good chance.

I'm gon na end up cutting the shaft off, but I can't get my I'm gon na try to use my bandsaw if I can, but I can't get it in here with this. Bearing so we're gon na try to pull the bearing off first and then we'll so, like I said it's not perfect, she's got to kind of do what you can do your best, all right, like Reb, it's almost like some metric Cowen grabs will grab me up. Bearing over there open it up and see those guys, oh it's a star! That's why this morning, but I mean I should grab though okay go down and see if I have any of these fittings, if we get one of those star bits um another name. Well, that's off a little bit out of time.

I will try to pull it there enough. I think it'll come right off she's, more sandpaper, what right here? Okay, so it's get some penetrating oil right in these little grooves this guy's already loose. Of course, that's what we're gon na do here is I'm gon na try to grip the race on the bearing and move the shaft, so I can keep it in one spot, maybe, but also don't want to yeah nothing to work. Darien is actually coming apart.

So don't want to grip this because this is tightening down on the shaft and trying to get the race above that, if I can. Okay, let's try this. Maybe I shouldn't have. If I keep that there's - and I think I got a better all that I'm trying to do is break the bearing race free of the shaft there we go got it so I'm using the weight of the wheels and everything to spin it free.

So now I can get some panacek and this guy's loose. That thing should slide right off now. So if I was changing just this bearing we'd be in luck, I wouldn't have to change the whole shaft and the blower wheel. Life happens, slides right off cleanliness.

Is your best friend clean it? You can see too that looks like the bearing seal had failed, because that's all the grease coming out with one spa matter. It was over greased and it blew the sea alone. That happens too. The next question is: can I get this in there to cut it? It would be so close, it might work cut the shaft, I'm just wondering: what's gon na be easier, get in there and cut it or just fight it and try to get the whole shaft out well, I know for sure this has to come off, so we're Gon na take that off real quick, no matter what we do, this we've got to remember how it went together too.

Why don't we set this like this? That's where it goes. We've got that we do me a favor and go downstairs just take the bucket with you and ask the manager for a bunch of towels yeah we're gon na go through our lot here. Real quick question is: can I get this in here now whoo? I can look at that you're gon na test the strength of a m12 bandsaw. Now how good the see wisely it's cutting through like bottles, and I beat the crap out of this place more than halfway through the shaft right now.

That's awesome. I take back all the bad things I said about. You is that nice, so now we got it cut. I can drop the wheel out, so we're gon na go focus on the other side.

Now see we got to do to get the other side loose. I probably should have loosened this before I cut the shaft on the other side, see if we can get this race loose, I'm very impressive on the walk all right, so we're trying to loosen this race over here this one Mike, I didn't think straight. I should have listened like cut down free hold this back. This way cut this off, so this one's free there.

So that's free! We can slide that one out. Okay. Next, I'm gon na go ahead and cut this to get this out of our hair. Let's move this over just cutting to give ourselves space to work in here.

Damn that's crazy! It cuts right through that steel into the okay, keep this together. So we know how to assemble it, and hopefully now that we got the blower wheels free, we're gon na pull them out this way. But we got to get these little brackets right here off. So there's usually a couple screws we'll take those off then we'll pull the blower wheels out and we'll work on getting the keyways out of them.

Okay, so we flipped the housing over we're doing one at a time. So we don't get confused. We're gon na put the bracket back right here then we're going to flip it over and mount it back, and then we'll worry about the shaft and everything in a minute and we've got the old blower. We always still need to get the key out of here, but we'll do that in a few minutes, we're going to just doing it one step at a time that way we don't get confused and put blower wheels in backwards or anything all right.

We've got the blower wheels in. We took it one piece at a time so now we're going to feed the shaft through, and then we got to focus on getting those keys out of those things. Actually I'll probably do the keys first. So that way we can figure that out.

So these use a very interesting-looking key in that it looks like this, so it slides in and stocks. So this one wasn't coming out, so I cut the wheel fold it out this one right here. I just hit the shaft and it popped right out, so we're good. We got the keys now, so we're gon na start assembling the other one.

So we just slowly push the throat of the shaft through making sure that we're not damaging the wheel put the bearing on slid it through this side, we'll put the keys in after and then we're going to put the brackets that hold the bearings in now and Then that'll stabilize everything so we're just piece by piece putting this back together, we went ahead and tighten these brackets. We tighten the bearings down, we lift it. Luckily, we have all the old spots, so we lifted everything back up to where it was now we're to the point where we're centering the blower wheels, because the blower wheels are still loose so we're just finding the happy medium. This one looks like it's got too much, so we need to go back a little bit more, so we just kind of push it that way, just kind of get an idea right.

There get an idea right there, maybe a little bit more. This way, maybe right there up a little bit too much. It's just finding the happy medium of the centering of the blower wheel and then we're going to put the keys back in and then tighten the wheels down on the keyway. What you do is lay down a piece of sandpaper like this and then just rub it on the sandpaper to clean it off.

Now, when you get a nice clean and then up here we're gon na have to you get the point, then you got a nice clean key put it in there put a little wd-40 on the shaft, so you can push the key right in so there's a Problem here, it's okay, we're gon na push the whole shaft. This way a lot, because this whole shaft, there's not enough room for the key so take the whole shaft - will have to recenter everything so take the whole shaft and push it. This way find out. Remember how much it was sticking out.

Maybe like this much. I think on that side. Wasn't it very much you need to go? We need to get it basically about right. There go ahead and clean up these other keys, so we've got everything torqued down nice and tight good flows.

Easy blower wheels are centered as best as possible moves freely, so we're gon na wipe down this blower housing and then slide it back in. We push the blower assembly back in. We tried to clean it off as much as possible. I'm gon na go, get new belts and I'm gon na get a new pulley too.

If I can, but I got it in there cuz. I want to bump it and get it running before they get too many customers in there, because just from eyes, agitated and moving everything, I'm sure we're gon na blow dust down in the building. So so I got my guy another person, that's working with me going downstairs and we're gon na bump start it and he's gon na. Let me know if it blows dust into the bar area, so you can hear the sound difference.

Much quieter. So I'm still gon na put a new motor, pulley and belt on this guy too, but at least we can have it running, so we can cool off their dining room, we're also gon na check and adjust the charge too. I have a feeling that the charge the last time I checked it was low because it seemed low because it was airflow that wheel was really dirty. Okay, so we're going to replace this pulley and I already pulled the set screw out and we just take the ball joint separator or I call it a tuning fork and pop it, and it applies pressure evenly comes right off, makes your life a lot easier.

Alright, so we kind of want to start with this, the other one, because we really don't want to mess with the balance too much if you want to try to match it up remember this is what sets the speed this adjustable. Pulley is what sets the speed of the blower assembly. So if you want to increase the airflow, you adjust the motor pulley. Now I have a feeling I'm going to be speeding this one out, because I feel like we're running low airflow on this unit, but I can't really speed it up too much, because this building has been balanced mess with the air balance of the building.

So being careful about getting the wd-40 or the penetrating oil, you don't want it to get in surface, I'm just gon na turn it until the keyway and I can push the key in once. I can push the key in. I am very careful because you don't want to mess the bearing up on the motor when you go to some laptops, nothing heavy fitting. So I need the sand that, because there's a pretty big group on there, I forgot Xero's, I'm actually gon na pull the cassette screw out to make sure that the key is underneath.

It is the whole point of that key is for the setscrew to press against it. You can pull the the setscrew out. You want to make sure the key is firmly under then, when we tighten it we're gon na. Do what I call running in we're going to tighten it back it off and then you'll notice that every time you go tighter every time you back it off and then tighten it again, you'll be able to go tighter.

What you're doing is you're set. I said fern everything looks good, electricals good push it back in just did what I said not today, better watch out wires would get tangled up enough. So I like these wipes, everybody makes different types of wipes, but they work really good for cleaning your tools off. These are by for once, yeah the yellow decrease.

After, like barring jobs and stuff, where it's real greasy, I'm always in there pointing my jewels off stocks. Everything it's covered in grease. You know when you get it on your gloves, we're currently recovering the gas out of each stage of that guy and weighing the charge back in, because when I had originally diagnosed this unit, it was acting like it out low charge. But, like I had said already, I was worried about the airflow because of the bad berry and them dirty blower wheels.

So we're gon na go ahead and weigh the charge back in and then we'll do an evaluation on the system once we're done with all that units been running for a while we're just going through the charge so third stage, we really didn't, have to add any Gas, I think a couple ounces, I'm just evaluating everything. It's looking pretty good numbers are a little off, but we still haven't quite stabilized yet, and I don't have the first stage running because we're currently recovering the gas out of that one. We already charged up the second one, so that'll be the next one. I checked.

So third stage is looking pretty good. My approach is a little bit low, but I know it's not overcharged. It's possible. The condenser could be a little dirty.

My split is low, but I also a miss you, the compressor right now, so that explains that I'm not going to be too worried about this one. This one looks pretty good to me for the most part, so we're gon na go ahead and jump on over to the second stage, see how that one's looking. So this is the second compressor we're running a little low on the head pressure. I'm gon na have to probably check some numbers because we shouldn't have a negative approach.

Temperature. I probably need to adjust the air outside air temperature right now, but this one is not scaring me. The pressures. Look.

Ok, it's about 75 degrees, 76 degrees outside. So we're just gon na keep watching it again. I don't have to be careful because I don't have all the compressors running right now and it does say to have all the compressors running when you're checking approach, temps and then also my capacity and my airflow is gon na, probably be off. I'm assuming because I don't have all the compressors running either so this is saying I have really high airflow at the moment, which another thing too is that and I'll have to email them.

But this is a 13-ton unit and they only have a spot for 12 and a half ton on the lemon thing, but yeah, I'm not too worried about this. We're looking good, all right last ones, looking good head pressure's low, but I'm not too worried about that. These things they are kind of funky, sometimes but temperature splits, better air flows better. I'm not gon na get perfect.

I think we have a dirty condenser to subcooling. We always run at the top into the stuff going 1213 degrees. Usually super heats right where it should be, I'm feeling pretty confident in this nothing stabilized out yet who study curiosity, what does meander quick, say liquid line templates below outdoor temperature? I don't like that, but I don't understand that right now, because it may be just a bad spot left clamp. I usually clamp right there, though I don't doubt that we've got lower.

Airflow should be better than it was so so I'm just gon na. Let this run I'm happy with it. We'll probably talk to you about cleaning the condensers too, and then we can reevaluate everything once between the condensers, so that was a fun one uh it's actually been probably years since I've done a bearing job. That big and that's not even that of a big one - I mean that you know I don't work on anything bigger than like 25 tons for my package units.

So that's the first time I've ever done a double blower wheel, though you know. I wasn't too worried about it. You just got to try to break it down and think about things. Logically, okay, you know, but the very important thing when you're doing anything like this is before you start cutting and destroying double triple check that everything you have is correct.

All the parts are gon na work, nothing's damaged, you know and then systematically take them apart. I always try to you know not cut anything or break anything damaged, anything if I don't have to, but in this situation I had to cut the shaft. The way I like to look at it is is what happens if something I find out that the part is wrong, and I have to put everything back together in this situation. It was a a go or no-go basically because you know if, if I didn't cut that it would have taken me forever, but the moment that I cut it, you know I had no other choice but to replace everything and if something was bad I would have Been in trouble like if that shaft wasn't right, because that shaft was special-order, it took a while to get it.

So it's just one of those things. You know you just got to go in there and you know think everything through don't rush through it. You know and just take your time all right. Another thing too, though, in in my opinion, you guys tell me if you feel the same way, but I feel that you always need you know I even going through that job.

I was still a little like uh. Am I doing this right? Am i doing you know, I'm still a little insecure, I'm still a little worried and, in my opinion, having that little bit of fear actually helps to make sure that you're doing a good job, because you second-guess yourself and yes, I know second-guessing yourself - can waste time. But it also keeps you on your toes and you know: overconfidence can be a problem too. You know you don't want to be unconfident, you know you, you don't want to.

You know make the customers feel, like you, don't know what you're doing, but at the same time you want to have that little bit of edge. You know worried inside you so that it keeps you on your toes and makes you double check before you make any big mistakes. Okay, other than that, you know, these units are never perfect, guys, there's not gon na be. I have never seen a unit that has perfect superheat and subcooling perfect airflow, all that good stuff.

Okay. So in this situation I weighed in the charge, so I know we had the right charge. Everything was looking half as decent. It's not gon na be perfect.

Okay. I you're never gon na find a package unit out there. That's absolutely perfect, especially in Southern California. Art ductwork is so jacked up on everything.

So you know. Sometimes you just got to deal with what you have in front of you and do the best at what you can. I start to notice trends. I mean I use measure quick.

I really do like measure quick, but I'm not necessarily always going by their numbers and their recommendations. I like to look at you know their diagnosis and you know compared to what I'm thinking most of the time. I can pretty much guarantee you that I have airflow problems, but you know, for instance, on these Linux packaged units. I always run high subcooling and that's just the way that they are.

I typically run anywhere from 13 to 15 degrees sub clean on these things, even though you know the ideal number is 10 degrees. I can't tell you that I've ever seen 10 degrees sub cooling on a Linux packaged unit. It's just is what it is. So you know, I do trust measure quick and I really do like it, but at the same time I realize I have to use my brain still too.

Okay, I'm not letting the computer decide for me that this is what you're supposed to do. Also, you know I mentioned in the video that this unit is a 13-ton unit and measured quick only had a spot for a 12 and a half ton or 15 ton. I think or something like that. It was it it stopped at 12 and a half ton.

So I had it set for 12 and a half tons, so you know that's why it was saying the air flow is kind of out of whack. You know you just got ta kind of use, your brain, you have to know. You know these digital tools are awesome and I do love them they're great. I recommend measure quick, smart probes, all that different stuff to everybody, but you also have to know the basics you have to you can't just let these things decide for you, because that's not gon na work.

Okay, you do have to be able to look at things and you have to you know, make decisions on the fly and say: okay. This is as good as it's gon na get, or you know that this thing says that I have you know this problem, but you know that's not the case. So sometimes you have to make those. You know decisions on the fly and you have to know how to interpolate what the digital tools and different things are telling you okay, but again, I want to be clear, I totally in for digital tools and digital gauges and all that stuff, but you just I Just want to reiterate, you just have to understand how the system is supposed to work to so that way you can tell when there's something wrong or or in my case, the air flow.

I didn't have the ability to choose a 13-ton unit, so I had to kind of just you know, wing it and say hey. This is okay, this units working properly? Okay. I really really appreciate you guys taking the time to watch these videos. Please give me some feedback down on the bottom.

Do me a favor and share these videos with your friends? If you know anybody, that's gon na, like the videos, let's hope that I can help someone else out too other than that. I just want to remind you guys that I do my live streams, Monday night's work permitting at 5:00 p.m. Pacific time. What I mean by that is is that if I'm super busy I'll have to cancel the live stream, but tentatively Monday evenings 5:00 p.m.

Pacific time, I do Q & A live streams on YouTube. Where I just talk about videos, talk about comments, questions emails, help people out as much as I can share the little bit of knowledge that I have okay, really appreciate you guys and we will catch you guys next time. Okay.