EXHAUST FAN NOT WORKING

This was an emergency service call on an exhaust fan not working. It had an electrical short,a bad motor starter and a bad motor. Unfortionately I was not able to replace the motor so we changed the whole fan and got them back up and running by 12:30 the next day.
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[@majbummer69]

"The disasters that usually do entail my job duties." Too relatable.

[@eddiewhaler1]

When I was younger, I worked in some restaurants that if there was a power failure they made you keep cooking with no exhaust at all. I walked out on one job and said it's not safe, Ansul could go off, and the combusted gas fumes are toxic. I loved when you said there seems to be problems with every restaurant. Man... no more true words ever spoken. How lucky were they you "Just Happened" to have another Captive Air unit. Another amazing repair.

[@wtfman5313]

You handled it perfectly. I drill 2 quarter inch holes, bolt a short length of chain across the center of the wheel hub and slide hammer until the wheel breaks its bond. Then work it off with wooden wedges and a 5 LB sledge. My boss would frown upon changing the fan unfortunately, because I'd swap it for a practical design. Enjoyed the vid my man.

[@jake2213b]

Try a front end tool that is a bar with a V fork. Also if our equipment was on 460v for a 480v I would junk that transformer for low voltage.

[@jrmcferren]

460 is the NEMA nameplate rating for motors on a 480 volt nominal system.

[@JoeCdaYT]

I recommend using in those situations a ball joint separator. Has a flat side that is wedge shaped. Thanks for the video.

[@joshonthetube]

What a dumb design! I'm not a hvac guy so i'm not sure how this would affect balance, but my inclination would be to drill and tap two holes in the hub to allow use of a puller.. but if that would throw the balance off, that's a non-starter. The customer is lucky that you had a spare assembly....

[@FireandFrostHVAC]

Sounds like you had a fun night... the only thing I can think of is to drill and tap 4 holes around the shaft in the fan blade and try to use a puller. I like the air bag idea too though. Good video Chris.

[@45asunder1]

This happened to me too.I removed the back cover from the motor then grabbed rotor while spinning the blower. It took a while but it finally spun off the shaft. I also used a lot of WD40 to help the blower slide off.

[@HVACRVIDEOS]

this is a great idea but I need to get the key out of the shaft first and that is still a pain, I imagine a spot weld to the key and a puller would work though but I don't have those tools in the field..........

[@45asunder1]

@@HVACRVIDEOS you're right, mine was a smaller unit without the key.

[@dandfgarage986]

Well, that’s Captive Aire for you 😂 I’ve never had good luck with them.

[@hartsfire5706]

wow that is a real work of art. I do see a way to change the motor but it is not something you can do on a service call. I feel for you on this job. call the manufactory and see if there is a tool to pull the fan off I am betting that there is.

[@HVACRVIDEOS]

yeah i am gonna take it back to the shop and video how I do it! I will be going live on KZbin this evening 9/16/19 @ 5:PM (pacific coast time) to discuss my most recent uploads and answer questions from the Live Chat, KZbin comments, and from emails. Come on over and check it out, kzbin.info/www/bejne/bZmycpx7mMZ8nZY

[@FLYWHEELPRIME]

Definitely poor design, but it's not made to remove the squirrel cage like you were doing. They want you to pull the motor vertical. Ran field service division for a huge motor shop not too far East of you for years, spent a good deal of time in Carson and Victorville. Keep up the videos man, great content.

[@Puffalupagus360]

get a automotive pickle fork with an extendable handle, there was just enough room to slide it in without hitting the fan wheel.

[@billburnett9951]

Love those AC Tech/ Leeson drives. So easy to install and set up parameters. Great Video!

[@HVACRVIDEOS]

Thanks Bill, I will be going live on KZbin this evening 9/16/19 @ 5:PM (pacific coast time) to discuss my most recent uploads and answer questions from the Live Chat, KZbin comments, and from emails. Come on over and check it out, kzbin.info/www/bejne/bZmycpx7mMZ8nZY

[@neverenoughtime3151]

Since this is a recurring PITA, ahead of time, make up a flat version of a pickle fork out of the thickest material that would fit where you wanted to put the pickle fork (making the fork wide enough to spread the force out on the upper housing). Then, to remove the fan cage, install the pickle fork, unbolt motor, spray motor shaft with penetrant, and use a zip gun (air chisel) with either hammer or pointed bit (since motor shaft has indentation) to impact the motor shaft. I'd guess it's really a 2-person job since you'd need at least 3 hands... one pulling on the motor (ready to grab it when it comes free), one using the zip gun, and one ready to catch the fan cage when it breaks free.

[@douro20]

A fan like that should be mounted against a flange on a keyed shaft and secured from the end with a plate which screws into the motor shaft like the rotor on a pump. Such a setup would make the job a lot easier.

[@tyhuffman5447]

Try some of those pneumatic wedges to “pull” the fans. It’ll probably take several but it will/should work. The force will be much more spread out so little chance of damage and the total amount of force will be much greater. You can use smallish inter tubes, the little square are used to lift refrigerators so the wheels can be extended easily.

[@HVACRVIDEOS]

yeah if the air bags don't work i will look into those, thanks for the tip , and thanks for watching!

[@tyhuffman5447]

HVACR VIDEOS dude sorry for not watching the whole video before offering a tip you already acknowledged. The small square pneumatic wedges are used also for leveling pretty heavy stuff so they should work, and they are cheap.

[@coolezum]

Just a thought. If you used one of those pickle forks that they use to separate a ball joint or tie rod end on cars, it may allow you to force the turbine down. The hub on top is stout enough to handle it and the housing above should. The one I have is about 18 inches long but, you could easily weld an extension if needed. Worse case, I have made my own tools for weird or quirky jobs.🤔😊

[@mysock351C]

They do make forks wide enough to clear the hub but theres only sheet metal on both sides of it to push on. Youd probably also have to stack two of them on top of each other as well. It probably could be fixed by drilling two holes in the fan and making some threaded plates to accept a puller, but probably too much work to do on a roof.

[@coolezum]

mysock351C you would push on the hub, there is some room above the hub if you look at his vid but, ya I thought same thing on drilling and tapping bottom of turbine fan. The wheel should not be on very tight as no rust just grease on shaft from kitchen.

[@mysock351C]

​@@coolezum My concern was the sheet metal above the hub but if he could have moved the motor down far enough it would probably work. Posted the same thing above about tapping the hub plate. Dont know what its made of, tho. If the fan and motor is available as a module by itself maybe thats what they expect you to do. Still would see that costing about 500-700 dollars on its own. Seems kinda steep to leave out two threaded holes or some other provision to remove it.

[@jaymondy]

@@coolezum Big issue here is cooking grease, is never a lubricant. only binds everything up.

[@RoyFabian]

Ive actually used those pads to pull large pulleys off. It's hit or miss though. You dont want to apply any heat because it'll melt the bads when you go to use them. And I'd use more that two just to more evenly press it off.

[@chriscooley906]

I could tell as soon as I seen you start filming at the roof door that the nightmare was just beginning way to hang in there bud, So much for the overload on that motor starter doing its job, better install bigger wire on the next one to protect over amping in the future, Thanks for sharing your trials and tribulations.

[@johnnysaltyaircrabcake8030]

All new installs I try to convince the customer to put anti-seize on anything easier to access now when new

[@douro20]

Those Lenze drives are very good. You can have a remote panel to control and monitor them. Since it's a vector drive the remote panel can be used to monitor the condition of the motor.

[@JaakkoF]

Two options for pulling that fan wheel off that I can think of: 1. Buy an automotive pickle fork with long enough handle, it might fit in that gap and allow whacking the thing off. Not a big fan of this solution as hitting things usually ends up in more damage or sudden unexpected happenings. 2. On the inside of the fan where you see the motor shaft, drill & tap two screw holes on opposite sides of the shaft to the hub of the fan blade, as it looked quite thick. Then screw in a piece of flat bar to these new holes that has a threaded hole in the middle (I'm pretty sure a ready made puller like this exists) and torque a bolt in the middle hole, so it pushes against the shaft end. Pro tip for drilling a hole, especially in steel: start off with a 2.5 or 3 mm (1/8" or a tad smaller) drill at full speed, drill the depth you need. These small drills have a non-existant chisel point, so they are very easy to push in to the metal. Then follow up with a larger drill, like 5 or 6 mm (1/4") and then your tap size drill. Makes it super easy and you don't have to use force to get the drill in to steel. Just in case the situation comes that you don't have a backup fan sitting in your shop ;)

[@AaronCo29]

I know its a late comment, but I have heated the wheel around the shaft till it slides off. It can still possibly cause problems in the wheel, but it may work in a pinch, Don't touch the wheel without gloves and don't set it directly on the roof, it will melt thru and cause a leak.

[@mikerocheleau1168]

Slide some thin pieces of wood in the slot and pull up on the motor. Then the vanes on top won't get crushed and there is even pressure on the fan to get it off.

[@HVACRVIDEOS]

I will be going live on KZbin this evening 9/16/19 @ 5:PM (pacific coast time) to discuss my most recent uploads and answer questions from the Live Chat, KZbin comments, and from emails. Come on over and check it out, kzbin.info/www/bejne/bZmycpx7mMZ8nZY

[@johnnysaltyaircrabcake8030]

Ive worked on that same unit.. it sucks to get the wheel off... I got the wheel off by putting metal pipe and a pry bar with a large tapered end on 4 parts of the wheel and tap with small sledge on each one easy at a time to break loose.. prying one side only bends the wheel..need even pressure to slide off. If really tight to get loose, they need replace

[@mysock351C]

On second look seeing the clean one the hub disk is thick enough to drill holes into and tap to accept a small puller like a steering wheel puller, assuming its not something cheap like cast aluminum or zinc. Using some 1/4-28 bolts would probably do it. Dont know if its worth it given it can be replaced as a module, but it looks doable, for what its worth.

[@alantorrance6153]

Suggestion for removing that fan. It looks as if there is a very narrow gap between the top of the fan boss (has the set screws in it) and the shelf that supports the fan. Instead of levering down on the outside edge of the fan (risking bending it), how about using a steel rod, with the end ground down into a screwdriver blade section about 1/2 inch wide, thin enough to put or hammer into the narrow gap. Machine the outside end of the rod to 1/2 inch square to fit a standard socket handpiece and use that to twist the blade. If needs be, add an extension to the socket handpiece to provide additional twisting moment. In other words, twist to exert downwards pressure right at the centre, where it cannot cause damage?? Once it has been budged even a little, it would presumably come off the rest of the way fairly easily -- you just have to break its "lock".

[@emolatur]

8:05 I think you could get a couple pieces of steel plate between the hub and the hole to hold the wheel down, then pull on the motor...

[@jeffgrant6914]

Nice repair video 👍

[@HVACRVIDEOS]

Thanks! I will be going live on KZbin this evening 9/16/19 @ 5:PM (pacific coast time) to discuss my most recent uploads and answer questions from the Live Chat, KZbin comments, and from emails. Come on over and check it out, kzbin.info/www/bejne/bZmycpx7mMZ8nZY

[@asbestosfiber]

You can call 911 and let them know you set off the alarm. The FD may still come but they will slow it down and probably send some units back.

[@prjndigo]

you need a couple cam-sticks, they're rods with dual spiraling out surfaces, when you use those airbags you want to put them inside "tacos" of fairly good gauge sheet metal, you can just put a cloth over that to keep it from sliding and you'll be good to go.

[@FishyCanada]

Have you tried an air chisel with a pointed bit on the center of the motor shaft?

[@carloscortez2276]

I've seen that setup before you usually loosen everything on squirrel cage and the motor. Then with a aluminum bar the size of the motor shaft you hit the motor up losing the cage. If that makes any sense.

[@MattMuckleroy]

I agree. That is the only way I could think of. If still stuck, clean off oil and grease, heat shaft with torch until it turns white, then beat it out. I am afraid thise air bags could destort the fan.

[@wonderhomie2011]

My question is how come the overload wasn’t set to kill the power in a single phase situation? Seems like it was overlooked. Sounds like you have to maybe stock just one for this situation.

[@HVACRVIDEOS]

Yeah it was set but it didnt trip........

[@HVACRVIDEOS]

I will be going live on KZbin this evening 9/16/19 @ 5:PM (pacific coast time) to discuss my most recent uploads and answer questions from the Live Chat, KZbin comments, and from emails. Come on over and check it out, kzbin.info/www/bejne/bZmycpx7mMZ8nZY

[@jaymondy]

There is no phase monitoring for a contactor/overload, it is not a true motor starter or VFD. When this happens it will basically weld the Contactor in place a lot of times. The overload is only protecting the motor from pulling too much amperage over a set period of time ie.. too much static on the system causing the motor to pull too much amperage.

[@tallbrian100]

Can you drill and tap a hole in the bottom of the hub and use a bolt to push it off?

[@nando5302]

Great video/ content Chris.

[@4932gb]

Drill and tap 2 1/4-20 holes on the hub plate and fabricate a simple puller. Shouldn't create a balance issue.

[@RJMaker]

A few Air Wedges may have helped. They do work exceptional well often times.. :-)

[@RJMaker]

LOL just watched to the end...

[@HVACRVIDEOS]

I will be going live on KZbin this evening 9/16/19 @ 5:PM (pacific coast time) to discuss my most recent uploads and answer questions from the Live Chat, KZbin comments, and from emails. Come on over and check it out, kzbin.info/www/bejne/bZmycpx7mMZ8nZY

[@jamesfields4149]

To get that off you could use a couple of pancake jacks

[@ricardoruypena1021]

Change it for a Greenheck fan. The best

[@howardharaway2259]

If It were my job,and had the replacement in my truck,I would not waist a micro second trying to remove the wheel. Time is money,and the time that may be saved can be travel time to your next service call.And because these exhaust fans are so crucial to the restaurant, I would try and sell them a new set up for the other exhaust fan,that is IF .....that fan looks to be the same age,and original motor. They maynot go for it but I would try. Future work right ? I do not want to offend you by being a should of,would of person. You are wayyyyyyyy more mechanical/ intelligent then I will ever be. I am just thinking of how my boss would handle it, especially if they were a regular customer. Anyways,as always ......👍👍👍👍👍👍👍👍👍!

[@EdgarLucas1000]

Have you tired to use a ball joint separator on these? Looks like it would be the perfect tool for this, and you could bend the fingers slightly if it needs to be wider or narrower.

[@joevinski1]

One idea how about one of those giant arm pulley pullers like the kind that removes 24 inch wheel pulleys not sure if the arms would open up enough to grasp the whole wheel but a thought , also mb zip screw a sacrificial hub under the wheel to get it to start pulling idk I guess anyway would possibly thru the wheel outta balance mb call the mfg and see if they have a specialty tool to remove that wheel assembly sorry for your headache brother but that’s what keeps the job interesting lol

[@jayman2519]

Now that it's been awhile, what does the manufacturer suggest?

[@Metalcastr]

Why would the factory install a fan too large for the motor? In reference to the overamp

[@jaymondy]

It is overamping due to the larger fan trying to pull more air through an already undersized ductwork and static is going through the roof.

[@jacobcolby1423]

I’ve run into an inducer fan in a boiler with a similar design with the set screw being difficult to access and the squirrel cage almost impossible to remove from the shaft. So frustrating

[@viper22304]

Thanks for sharing. Awesome work. Question: can an economizer (not working) cause an increase of heat inside the kitchen? I have the Tstat set at 70°F and it reads 78°F. I installed a new Tstat and still having the same issue. Thanks.

[@ranchertrapperdieselbuilds3632]

I love your vids man. Awesome

[@HVACRVIDEOS]

Thanks bud!!

[@sterlingarcher46]

What a bloody can of worms , ey !good one , Chris, Please let us know if the air cushion method works , thanks for the tip!

[@lazerusmfh]

If I would encounter that model very much I would make my own tool. Have a three bolt hub you self tap over the bearing in the fan side then crank a center bolt down to push the fan off the motor shaft then unbolt your tool. You’d make some happy customers that otherwise would be sol with a 50 dollar homemade tool. If you’re real keen on it I could possibly cut you out one if you provide me dimensions on the shaft etc.

[@jaymondy]

These cost much more.. who will pay.. lol Seriously though that riveted construction of that wheel, you would taco that wheel or need to tap into the hub, and then the fear of owning any of the next problems because you tapped the hub is your issue to own.

[@jamestoy426]

Nice job

[@throttlebottle5906]

need a couple of long pry-bars, the ends should just fit above the hub and between the housing, one on each side and work it, probably need 2 or three people one guy with sledge and brass rod to whack the shaft, an air hammer or hammer drill is hammer only mode may be better. then probably still have to torch heat the hub area without causing a grease fire lol. their best bet is keep an identical exhaust on hand if they cannot handle much down time, then rebuild the old unit in a shop or on the ground where it would be easier and no chance of puncturing the roof.

[@HVACRVIDEOS]

Yeah i'm gonna take it back to shop and rebuild it so i can keep one of these on hand for the next time!

[@robanderson84]

seems weird a vfd would be roof mounted in your area, where it is hot, not a good choice, keep low and cool, i tore one apart yesterday that was arcing to back panel from circuit board, they are expensive finicky things, not my money at least

[@ne8r]

Loosen set screws, tap on motor shaft toward motor to drive off blower wheel.

[@robanderson84]

i was going to suggest the air bags x 4, and some padding between the sharp edges, then if that is not enough, try a air hammer pencil point at the middle of the shaft, with pressure from the bags should be enough, still i agree is a bad design

[@matthewgregory8218]

And even though I’m not a technician I’m almost sure you need to check the make up air on top of fixing the hood fan condenser

[@BlindBatG34]

Get some 8 point sockets for the square headed fasteners.

[@robanderson84]

i use them a lot on dock door shafts that have a few sizes of square headed bolts, works nice! we try not to loose those sockets =)

[@robandmonasytsma4187]

Tie rod fork and apply heat to the hub - it will slide right off. Also invest in a ratchet for that extension!

[@farmerhunterjr]

I hate those direct drive exhaust fans. They never go well when you have to replace a motor, you always end up damaging a wheel and no store wants to pay for a new fan it seems like. Good job getting it done. The only thing I would have maybe tried is using a real long sawzall blade and cut the shaft so you could drive the shaft out with the wheel out, but I don't know if you could get a long enough blade for that one. You might be able to squeeze a m12 hackzall in there. They could have at least left the key proud so you could pull it and lock the shaft in the motor and try to spin it off.

[@farmerhunterjr]

Or try like other ppl said try drilling some holes and tapping them (or snake some nuts on the back side)and use like a automotive style puller

[@xa-12exehasstopedworking29]

The fan is probably designed to be very hard to change the Motor so you have to go buy a new whole unit. Very similar to what Apple does with their phones and computers minus the self destruct futures

[@jo6520]

Could you cut the bolts that hold the motor on the fan blades and hope it drops?

[@jaymondy]

Construction is nothing like a ceiling fan. The motor is outside the airstream, across a plate with a hole just big enough for a shaft.

[@donnierobertson3088]

Great job again like always

[@electriciants7927]

Probably a faulty motor starter from the beginning. Good job though!

[@bluezr1]

I always just cut the shaft off the motor. That way you can use a piece of pipe on the bottom of the impeller and then pound out the shaft With a punch.

[@HVACRVIDEOS]

I will be going live on KZbin this evening 9/16/19 @ 5:PM (pacific coast time) to discuss my most recent uploads and answer questions from the Live Chat, KZbin comments, and from emails. Come on over and check it out, kzbin.info/www/bejne/bZmycpx7mMZ8nZY

[@bluezr1]

Will do, thanks

[@edswayze7635]

i have forty years experience i thought i saw it all.exf.'s can sometime be a bear to work on.

[@FennecTECH]

smart from the companies point of view XD

[@jonathanweimane6926]

If those are common, make a custom tool to pull the fan off

[@briankobes8208]

Wow that is a bad design. It would be hard and I know that thing is big and awkward not to mention probably pretty heavy but if you had two guys you could try and hold the thing upside down by the sides of the wheel and then tap on that shaft from the bottom and try and let the weight of the motor pull the motor shaft through the hub.

[@EricK-ig4ko]

Awesome vid as always

[@JuanTodoli]

Incredible.

[@HVACRVIDEOS]

I will be going live on KZbin this evening 9/16/19 @ 5:PM (pacific coast time) to discuss my most recent uploads and answer questions from the Live Chat, KZbin comments, and from emails. Come on over and check it out, kzbin.info/www/bejne/bZmycpx7mMZ8nZY

[@articairrefrigeration9142]

Will a mechanics pickle fork to separate it from the motor

[@HVACRNorth]

Did somebody say overtime lol. Good vid poor engineering.

[@HVACRVIDEOS]

Yep its gonna cost a few bucks for sure!

[@Harrypizzalover]

But a was taught by older tech to fix them we would cut off the the motor and replace blower real easy

[@steveurbach3093]

That breaker not tripping with that kind of damage to the480V feed wires bothers me. If that was metal Liquidtite, 277V arcing to ground should have tripped it, it punched into the adjacent phase. That breake need to be seriously tested. FWIW I had a 440V contactor blow up in my face (The 100A breaker was in front, which is the only reason I have eyes or a face. The breaker tipped NOW. The contactor body was carbon tracked and IF I had meggered it,...)

[@shifter8207]

I would try heating the fan wheel hub and see if that expansion will get it off

[@HVACRVIDEOS]

I will be going live on KZbin this evening 9/16/19 @ 5:PM (pacific coast time) to discuss my most recent uploads and answer questions from the Live Chat, KZbin comments, and from emails. Come on over and check it out, kzbin.info/www/bejne/bZmycpx7mMZ8nZY

[@chemech]

That VFD needs to have ventilation air - so they put it in a sealed plastic water-tight enclosure... Cheap, cheap design... If someone gets involved in suing the manufacturer, I do expert witness work on some types of mechanical engineering. This would fall within my wheelhouse.

[@mojoemurphy]

This is why we stopped messing with hoods

[@Edward-ud8hd]

what if you disconnected the motor from mounts and CAREFULLY tapped on the shaft of motor from fan side with a wood dowel and hammer? Its easy to say that sitting behind a keyboard and not being there but im sitting here thinking what i would do if i was in same situation and didnt have a whole new fan available! *STRESS*

[@Edward-ud8hd]

did not watch the whole video before i posted, that idea wouldnt work too well...

[@65bug519]

motor is toast right? You take the end off the motor and drive the shaft out of the fan with a hammer and drift bar . Done it many times.

[@andrewbandarovich1751]

I hate those fans. From cleaning and from fixing stand point.

[@quimshtgclg]

Couldn't you drill and tap 2 holes across from each other, shaft in middle and use t bar puller ?There is thick part at the hub .

[@HVACRVIDEOS]

its possible but i wouldn't want to mess with the wheels balance this wheel moves over 2200 cfm so it is spinning fast! I will be going live on KZbin this evening 9/16/19 @ 5:PM (pacific coast time) to discuss my most recent uploads and answer questions from the Live Chat, KZbin comments, and from emails. Come on over and check it out, kzbin.info/www/bejne/bZmycpx7mMZ8nZY

[@chemech]

That fan was not designed to be repaired... planned obsolescence... they figured on selling to first time buyers with the cheapest possible selling price.

[@necroticagony935]

Pretty bad ass you can Tell them to shut down the restaurant and they did it.

[@tyzxcj34]

Damn what a nightmare.

[@crazydan2327]

You have to cut the shaft with hacksaw blade

[@HVACRVIDEOS]

I will be going live on KZbin this evening 9/16/19 @ 5:PM (pacific coast time) to discuss my most recent uploads and answer questions from the Live Chat, KZbin comments, and from emails. Come on over and check it out, kzbin.info/www/bejne/bZmycpx7mMZ8nZY

[@jaymondy]

Fire alarm should never be on the fan control panel, should only ever be on the 'alarm initiating' micro switch on the fire system mechanical control head, or was this a core system? The VFD is in a sealed enclosure ::Facepalm:: non rated drives in small sealed enclosures. Only a drive with a 4X enclosure should be out there or in a legit full fan housing. If that VFD is before that Contactor, Is it setup to do a controlled start? or a hard start of the motor with the drive already at full acceleration/HZ, if the enclosure does not cook that VFD, that repeat hard start will, Or is there another contactor down in the kitchen? Was there a means for water ingress at the Contactor/Overload? The 2 piece hubs work way better for removal but yeah that is a rock and a hard place when you get to motors that big. At that pace even trying to use a press to remove that wheel is difficult at best. Its common at that amount of heat though that those shafts seize to the hub, and are a complete pain. Surprised the wheel is riveted construction, usually for a utility set type fan they are welded. Would have given much more strength to be able to pry and get that wheel off. Should be able to unmount the motor, get the wheel on the hard and get a bar between the top of that hub and the motor, or Take an 8 lb sledge and put that wheel on a flat surface and just try to atleast push the wheel further on to atleast attempt to break the bond., Try some heat to the hub too. This is a common issue across most/all manufacturers. Those fins on top are doing nothing to draw fresh air from the motor compartment to provide airflow for cooling, with that much grease up there, it looks not so effective.

[@jaredj631]

I don’t think the air bags will work, the bags are only 350 pounds each.

[@trinito97]

A lot new stuff comes like that

[@DoodleyDavid]

Single phasing a motor is a great way to kill a motor

[@wayney3851]

Got be steak n shake You have to replace the shaft

[@HVACRVIDEOS]

I will be going live on KZbin this evening 9/16/19 @ 5:PM (pacific coast time) to discuss my most recent uploads and answer questions from the Live Chat, KZbin comments, and from emails. Come on over and check it out, kzbin.info/www/bejne/bZmycpx7mMZ8nZY

[@judecorby5463]

You are my lodi

[@billbobeg]

What does SOL mean

[@HVACRVIDEOS]

Shit Out of Luck

[@TechUniversity1]

best videos!

[@HVACRVIDEOS]

thanks so much for watching!

[@Quentyn73]

Dude it is stupid only to you until you realize it is being designed like this so that they sell you the whole assembly...

[@Michaelisinachair]

If it was a belt drive just go to the auto store and get a replacement.

[@ktga67ish]

Michael That doesn’t even make sense

[@joea2274]

12 point socket on the end of the extension

[@ktga67ish]

Joe A 12pt works, 8pt is the best on these square set screws.

[@joea2274]

@@ktga67ish I alwes thought that 12 point would grip a square better

[@ktga67ish]

Joe A A 12pt is set up for a normal hex headed bolt, the 8pt is basically a 12pt for the square headed bolts.

[@joea2274]

I had to use a 12 point on my last square because there was know way a 8 point would work for me

[@ktga67ish]

Joe A why wouldn’t a 8pt work on a square head?

[@tylersheehy3918]

I bet it was fier alarm party

[@steveblake8766]

#301 Thumbs Up.

[@shadowsiren3058]

Or wait wait maybe over 110 degree weather must of melt the wires to cause an arc

[@tyhuffman5447]

Mr.Johnny boy as long as the wires are sized correctly there should be no problem at 110f. Machine rooms and penthouses can run hotter. Could have been a case of using service junior or SJ wire instead of S wire. 440v service is probably too high for SJ wire. Probably the wire was nicked during install then it’s just a matter of “when” it finds ground not “if”.

[@tiredoldmechanic1791]

That flexible conduit is corrugated inside. The fans vibrate so the wires are shaking against the corrugations and can eventually wear through. XHHW wire is the proper choice for flexible conduit.

[@tyhuffman5447]

Tired old mechanic excellent point.

[@thiccfrogg1380]

Why are these so entertaining

[@dandfgarage986]

The reason they did this so complicated is so you HAVE to replace the fan and buy a new one and they get money.