HVAC | How To Change Big Bearings & Motor | PT1

Summary

Highlights

• Emin shows us how to listen to worn bearings, demonstrating their noisy cries! 🎧
• Crucial advice on threading: use threads to push off, not to lock down! ❌
• Deft pulley-puller maneuvering ensures the flywheel comes off smoothly! 💪
• A caliper is more precise than a tape for measuring bearings, a tip shared by Emin! 📏
• The solution to a misfit bearing: repositioning instead of washers! 🤔

Key Takeaways

• Always check and use the right tools for the job; they make everything easier! 🛠️
• Mistakes happen, like slipping pullers, but they can teach us valuable lessons! 🤓
• Make sure to loosen set screws to avoid unnecessary hassle! 🔩
• Clean components before installation to ensure longevity and proper fit! 🌟

Overview

Chapters

• 00:00 - 01:00: Introduction and Job Overview The chapter titled 'Introduction and Job Overview' introduces the task at hand, which involves working on a large blower for a school project. The focus of the work is on changing the motor and the pillow block bearings. It begins by identifying that the bearings on the motor are faulty and need replacement. The team is tasked with removing the old motor and installing a new one, along with changing the bearings. The transcript details the initial inspection and setup for the job, including a demonstration of the existing problem by turning on the motor to highlight the faulty bearings.
• 01:00 - 02:00: Removing the Guard and Tools Needed In this chapter titled 'Removing the Guard and Tools Needed,' the focus is on addressing issues with noisy bearings. The noise indicates that the bearings are worn out and need to be replaced. The chapter likely guides on the process of removing protective guards and lists the necessary tools required to carry out the replacement effectively, ensuring smooth and quiet operation thereafter.
• 02:00 - 03:00: Loosening Flywheel and Nuts The chapter titled 'Loosening Flywheel and Nuts' focuses on changing the pillow block bearing at the back and potentially replacing an old motor. To complete the task, a set of sockets with drives is essential.
• 03:00 - 05:00: Removing the Flywheel This chapter discusses the process of removing a flywheel using pulley pullers. The speaker mentions having two sets of pulley pullers, specifically stating they will use a larger one from the OTC brand for this task. Furthermore, the speaker highlights the need for a new set of bearings, noting that the ones they have are smaller and need to be built up. The chapter seems to be focused on the initial steps required for the flywheel removal process.
• 05:00 - 07:00: Older Style Bearing and Measurement The chapter titled 'Older Style Bearing and Measurement' provides a detailed step-by-step description of how to loosen a flywheel. It explains that the first step involves taking off the nuts that hold the hub onto the wheel. After loosening the initial set of nuts, they are then screwed onto another hole to push the flywheel out. The instructions are given in a practical and instructional manner, aimed at guiding through the process visually.
• 07:00 - 09:00: Using Pulley Puller and Removing Old Bearing This chapter explains the procedure of using a pulley puller to remove a flywheel from a hub. The narrator instructs on how to properly attach and differentiate between the components involved, emphasizing that the threaded side is used to push the flywheel off, while the non-threaded component connects to the hub. It highlights the critical point that when reassembling, you should not lock the flywheel by attaching the bolt to the threaded section, as this could cause malfunction.
• 09:00 - 11:00: Installing New Bearing and Cleaning the Shaft This chapter covers the process of installing a new bearing and cleaning the shaft. It begins by discussing tools necessary for the job, specifically mentioning the importance of manipulating threaded and non-threaded parts to effectively handle the Hub. Practical tips and additional observations, such as ensuring proper lighting for the task, are included to guide the reader through the procedure.

HVAC | How To Change Big Bearings & Motor | PT1 Transcription

• 00:00 - 00:30 hey good morning guys today we're working on this uh ginormous blower um this is for school we're doing now we have to change the motor here bearings on this motor is bad give me a light here change this old piece of motor we got the new one here and then we're going to change the pillow block bearings on this one as you can see right there I'm going to turn this guy on so you guys can hear what's going on here
• 00:30 - 01:00 [Applause] so you guys hear those bearings really noisy so we're going to go ahead and change those
• 01:00 - 01:30 so fellas we got the guard off as you can see um so we just basically have to change uh this pillow block bearing in the back this guy is old as and then uh this motor here like I said some of the tools that you're going to need to uh do this job uh you're going to need a set of sockets okay set of sockets with the drives of course you're going to
• 01:30 - 02:00 need a pulley puller here I have uh two sets of pulley puller uh I got the OTC brand this application I'm going to have to use a big bigger one which is this guy right here um of course you're going to need a set of new bearings uh these ones are a little smaller they're lower than the other one I always have to build them up and that's it so first thing to do
• 02:00 - 02:30 to loosen up this flywheel take off these nuts that's uh holding the The Hub on through wheel once you loosen these up you start screaming them on the other hole to push this out basically so I'm going to do that right now and I'll show to you guys how we do it so you're going to take off these nuts okay take him off and um you put it on this on the next hole
• 02:30 - 03:00 what this basically is going to do is we'll push this uh flywheel off the Hub so just go ahead and just take off the rest of them the one with the thread is the one that you push off the Hub the one without the thread is the one that gets connected to the hub and then when you put this back the most important thing is not to uh put the bolt on the thread portion of the Hub to lock the flywheel in cuz you'll it's not just just not
• 03:00 - 03:30 going to work you even you could even crack the the the nut so the thread part goes only to push off the Hub the ones without the thread in them is the ones that gets locked into the Hub basically so then we have the next one here going to show you how you guys give you more [Music] light you light it's enough light there yeah okay
• 03:30 - 04:00 so let's Tien them up and um so you go ahead you T these up sort of like a car like the way I was taught some people say go round and round but you kind of want to go in a star form
• 04:00 - 04:30 okay so basically what I'm doing now is um I got this bolt on this thread of the the thread part of the Hub I'm screwing in to push this flywheel off the Hub so that I can take all this off see the first thing to do to get the fly wheel off you have to push it off you use the thread part again on the Hub to push off the flywheel okay see just that like like that you
• 04:30 - 05:00 don't don't continue to keep going if you can't go if you're struggling to keep turning the wrench then you stop you move to the next one you know that's what I do that's the way I was thought I mean maybe there's a better way of doing it but this just the way I know how to do it okay so see as you see I'm spinning freely there so I'm just going to keep going until this guy's actually already coming off you can see right there okay
• 05:00 - 05:30 I'm already basically off of this guy right actually I'm already off voila okay so bring that camera close to H I'm again I set the Hub the part that doesn't have the thread that's where you would put in the the nut the bolt that will get screwed onto this thread of the Hub and secur of the fly wheeel secure the Hub onto the fly High wheel okay the thread portion of the the
• 05:30 - 06:00 hole with the thread on the Hub is the one that you use to push off the Hub cuz basically this bolt will come through and push it off just remember when you put it back do not put the nut the bolt on the thread part and connect it on the thread part on of the flywheel cuz you will crack this bolt I've seen it happen I've done it when I first started out and uh then you'll have a hell of a time time getting off the broken so again the
• 06:00 - 06:30 hole with the thread is the one to push off the uh the one that get locks the flywheel on to the hub the hole with the thread is the one that pushes it off okay so guys I got the flywheel off um next thing I'm going to do is I'm going to go ahead um loosen up these bolts give me a light here the bolt take out the nut the nut and the bolts on both sides now now
• 06:30 - 07:00 this bearing is a older style bearing um it's a little higher than the new one to have they do make the higher ones and the one I got for some reason is the lower one but I can build it back up with washers now uh what I did was uh I took a caliper and I kind of like just took a measurement to see how high I am from the bottom of this just to see what I will end up so I can get it right back um um so if you do have something like
• 07:00 - 07:30 this in the future and it's lower than the than the older bearing or higher or whatever the case maybe take a caliper caliper is a good way of uh taking AC taking accurate measurements I don't like to use tape measures stuff like this but this is more accurate you get um more Precision precise measuring on with the calipers so or straight edge so that's what uh I like to use okay so that's what I'm going to so I'm going to go ahead now and uh
• 07:30 - 08:00 screw unscrew these off and I'm going to get my big pulley puller I'll show you guys that actually how it works I got a big OTC pulley puller and U we'll go ahead and pull that off got this pulley puller on doesn't fit properly the way we needed to fit cuz it's uh it's a little shorter i' like to for it to be behind it but it's kind of hard to get cuz it's I don't I have the the pieces the legs they're not as long but it's working so we're going to go ahead
• 08:00 - 08:30 and we're going to see if you can see right there she's moving going nice and easy she is moving so oh she was moving so we just slipped off ladies and gentlemen Houston we just slipped off we just slipped off okay hold it right there Houston we have a problem my helper just slipped off he pulled out too quick
• 08:30 - 09:00 hey Steve why do you wear clothes we wear them because we have to wear her all right she's coming out man nice and easy she is moving take a look at that she is moving before I continue uh make sure that uh the new guys who are starting out make sure that you guys lose up those Allen Keys Allen the set screws
• 09:00 - 09:30 right there cuz I I mean when I first started I forgot to to loosen them up and I'm and I was struggling for hours trying to pull this one thing over so don't learn from my mistakes okay so make it easy for you guys there's always a nut U uh Allen Allen key set screw okay so just let you guys know that so we're going to go ahead and pull this oh sty
• 09:30 - 10:00 what you say okay ready your way holy H hold on hold on you got to go back okay so anyway let us take this off we'll get back to you guys 15 20 minutes of uh turning and turning we finally got the sucker off um there goes the old one
• 10:00 - 10:30 and there goes the new one it looks smaller but it is smaller but it's not too bad I just have to build it back up with some washers so that's that you know oh we can slide this up right here bro Oh Yes actually yeah that's a good idea can we slide that up yeah so we don't need to build it back up look at that my helper just came up with a great idea that we can loosen up these bolts and slide them
• 10:30 - 11:00 up I like that brother that's a good way you know what I really like that perfect so we're going to go on and get this new bearing on we'll slide it right on before you want to do that uh new guys you want to sand this shaft down really really good to the point where it's it looks like a brand new shaft uh you know try if you could save the struggling time uh that's what you do you know you sand it down get it clean it will help you out tremendously you don't want to see here trying to push
• 11:00 - 11:30 this damn thing in and it's not going in and you're banging on it and all this crazy and then screw up the whole bearing those things are not cheap they're about $7 800 so clean it up really well slide it on okay all right