1974 John Deere 7520- Air Conditioning Wont Work!!

[@shanesmith9308]

How could anyone not like his videos i love watching his videos. I am a everyday fan. He's my favorite KZbinr

[@donaldmorphis6729]

Hey Chris as an older watcher I’m proud to see such a hard working young man. Older equipment can be a challenge but you don’t have payments and can work on it yourself. Keep up the good work and don’t let those at sayers get you down. Love to watch your videos.

[@johnsandell4501]

Wrenching with Duffy AG!!! Amazing the time you spend wrenching. Thanks for showing us what MA farming is really like.

[@mikkel1249]

if you look in the mirror you will see a hard working man who is doing the best he can ........ you rock Duffy

[@fredkohlman8860]

Keep at it,, You'll get her. You won't regret having her in shape.

[@salsald23]

Great video enjoyed it you are almost there you have to find the power drop and change out the cooling coil it worth it thank you for sharing with us great and for your time.

[@cadcad4974]

Duffy, you make farming & wrenching very interesting. You're always reasonable, & analytical during the good & the bad!

[@retiredwelder]

The thing is Chris YOU LOVE WRENCHING!!! Especially working on that. Your kinda slowly bringing it back to new. That’s a sweet tractor. Someone had one at the tractor progress show. I don’t know what year but it was pretty sweet. New stuff is cool but I say the hell with electronics im for mechanical all the way. !!!!!! As always WORK SAFE 🇺🇸🇺🇸😎😎

[@jamesrabbits7434]

You're slowly getting it done. Take your time and get it done right.

[@de1849]

Your close dont give up now👏

[@Jimmythefish577]

Love this channel, you tell it like it is, bare bones, honest, no bull crap straight down the line.

[@jamesmorrison1884]

Hello got alot done just not together yet closer than when you started have a good day

[@Husker3435]

You do very well to keep calm and composed sometimes when nothing seems to go right...that is commendable hoss👌🏻👌🏻👌🏻🇺🇸MERICA🇺🇸

[@bootlegger3656]

Ok heres my $.02 cents worth on AC work . Nice to have and I dont know Jack about it lol . Your doing great , if I was there I could get you tools a cold drink say yep yep and smile for support . I am sure you will figure it out you always do .

[@amosmoses8718]

You're lucky just a few drops of rain. I have Ida beating down on me.

[@dcw1540]

You will get it . Thanks

[@1960teko]

Chris when you change the 134 after you pull the vacuum turn the drum upside down charge the high side liquid as much as you can then just slowly charge on the low side. I manly work on commercial refrigeration but also small stuff. Good luck.

[@littleliz7331]

Why would you want to charge liquid to the compressor? I've done automotive ac for 25 years now and have always charged liquid to the low suction side. It was the way we were taught by Delco in our ac class. Maybe I've been doing it wrong all these years. Luckily I've never had any problems.

[@williamuskoski1385]

@@littleliz7331 liquid goes on the low side

[@ram_diesel_power6039]

Yeah. Turn your Freon bottle upside down and use ac compressor to pull in Freon on the low side.

[@kb3kyx]

Randy is technically correct, in HVAC it's proper to set in the inital charge after pulling a vacuum in the high side as to not "slug" the compressor upon start up, the high side is always liquid anyways so you don't run the risk of damaging compressor components by trying to compress liquid. Not saying your way doesn't work, I have done it both ways.

[@ram_diesel_power6039]

@@kb3kyx yeah that’s with an actual hvac or ac machine with a vacuum pump and a compressor. Notice he is only using a set of gauges and a 30 lbs bottle. And a scale.

[@mattiantorno2241]

Not all days are production days, some are troubleshooting days, some are information days but all in all you get things done.

[@tractorsfamilyandwildlife1342]

All the work you put into it you know what you got well worth the headache's

[@TheGhostHAG]

Culver's and Father Duffy. What a Sunday

[@FreemanVashier]

Be glad you CAN fix it bro. There's a lot of farmers out there that can't afford the luxury of fixing their AC.

[@crittercraig9445]

Great job Chris even if things don't go right. There is always tomorrow to straighten things out. Enjoy how you don't let anything gets you down. Enjoy your night. Take Care

[@Thomasfarmstn]

I am a Red man but I love that tractor. I’m cheering for it, really I am. Should be an aftermarket upgrade for it.

[@jakiefunderburg725]

Check both pressure switches as well

[@leddielive]

You may feel as if you're losing this battle but I just know that you will win the war, keep spinning those spanners, from the UK.

[@darrinmiranda7408]

Check your hoses from compressor to top of cab. Make sure there aren’t any quick connects between. My 8640 had those and was the cause of inadequate pressures to cool. I removed the insides of them and it cleared up the flow.

[@jesseahner8473]

It’s frustrating but you’ll get it done. Stick with it till you figure it out. Rest easy and attack it tomorrow.

[@jakiefunderburg725]

You gotta flip that refrigerant tank upside down on otherwise it’s not going to meter right to flow in

[@timothybrown579]

Did you make sure the valves at the compressor were open? When charging they and using gauges they need to be centered and when in operation back seated to close the charging ports. Compressor circuit is powered through the high and low pressure switches and the blower motor. The condenser motors maybe hooked in the same circuit. That system is similar to the 5400 chopper we had. Chances are if that condenser is plugged internally you’re going to want another expansion valve and dryer. I’ve had dryers plug. Flush all the lines if you break that system open again, you don’t want to knock that new compressor out. I use 3M brake cleaner or electric contact cleaner, they do make a/c flush. Spray in and blow out with compressed air, don’t try to flush through the expansion valve or the dryer. I disconnect at those items and flush the sections individually. That’s what I do right or wrong but, it works for me and we have a lot of air conditioners on our place. Best of luck it can be frustrating!

[@markreetz1001]

It looks like you're getting some good advice in the comments. You have to work on equipment, new or used. But used, you can actually work on it! Sounds like you did get some things done. The u-joint, the battery connection, aint bad. Keep at it. To look for an upgrade now would just negate much of your work. Roll on!

[@garyfaulds2008]

Look at Canadian dealerships because the difference on the money

[@brianshell4111]

Hey I have a fab shop and specialize in aluminum and stainless and I have been trying to make molds a d jigs to build tractor and combine and chopper pannels from aluminum instead of plastic and steel. I would love to come up with all aluminum body pannels for your chopper. I know it's an old gem but would be a good start

[@neilramseyer5348]

That's gonna be a hard thing to do. Usually the panels are no problem. I'd look into making stainless frames for old trucks. Our 2005 dodge 3500 could sure use one

[@brianshell4111]

@@neilramseyer5348 I think all dodge frames and pannels are an issue. 2013 dodge 3500 by 2016 the cab corners and bed sides were bubbling. We bought it new......

[@neilramseyer5348]

@@brianshell4111 yes. Ours is only used for short trips. So all the salt has completely ate everything out. I'd be interested in frame and see a cost for a 308 stainless

[@redbovine]

I had a drier come apart on the inside and it blew mess thru the entire system. Ruins compressor and condenser and expansion valve. Looked like little styrofoam pellets really tiny though. Stopped everything up. 400psi on the high side will push those little things in places they can come out of.

[@j.b.maxwell8695]

Chris I think that isolation switch would be better on the battery earth lead not the starter lead, just a thought

[@bugsterino]

Some tlc and the girl will be good again for years ;)

[@av6067]

When the system is closed use dry nitrogen put it threw the high side watch the low side come up on your gauges if the low side doesn't come up that means you have a restriction in the system

[@jamesbergfeld5923]

You can try a ac flush and have the cover on to have proper air flow over condenser

[@ronanwalsh7024]

That tractor would be well worth fitting a roof mounted Eberspacher airconditioner unit. Very neat and bomb proof.

[@SbrGrendel65]

AC’s can be a pain in the ass! You buy older equipment and make some upgrades to it and maintain it. Your doing well no need to justify the cost ratio. If your happy that’s all that matters. You’ll figure it out, AC is hard not to have with a cab, it gets hotter with it being closed and windows…

[@Dairyland-Dairyman]

If you buy used from tractor parts asap they warranty there used stuff one year. If that evaporator is pulled out already they probably flushed it and pressure tested it to make sure it's good. They do have pick and pull at most of there yards for parts. But used stuff off the rack is usually checked over, and like I said they do warranty it a year, and really do stand behind it.

[@mitchellfreeman8986]

You can also use propane to charge your ac. I know it’s not the safest but it does work and much cheaper

[@wow6704]

I love this channel

[@jamesthomson9065]

I always go by pressure on the low side 35-45 psi on the refrigerant not the pounds of liquid. Be carful just running straight power to your ac pump. It should kick on when you reach pressure. You have low and high side pressure switches. They cut out on low pressure and high. Also if you have not changed the orifice you need to. You might already know all this do disregard if you already know. Good luck.

[@kswaynes7569]

It's only money Chris but you're well being is worth more! The early 8000 series had many issues and are valued less than a decent 7520.

[@amosmoses8718]

Check your hi lo switch on your dryer. It will cause the ac to turn on and off.

[@coryschwarzkopf8718]

My Allis-Chalmers tractors when the AC goes out I just buy a aftermarket kit that has all hoses compressor everything put it on and works great 134a Freon will leak out old style hoses

[@randydrinnon4000]

After you replace it make sure u blow all ur lines out blow and clan everything

[@nadz109]

Cool old tractor Put propane in the compressor? I’ve seen it before,

[@dominikpiskoric9649]

Does that communal John deere running if that running use tht for manure pump

[@lukejansen2321]

Having A/C is worth every dollar 💵

[@allendelong6182]

when you charge the ac turn your supply can upside down so you get liquid while youre charging best of luck

[@JaredJanhsen]

I would never liquid charge an air conditioner where the low side line goes straight into the compressor. Not even when using the newer manifold gauges with the built-in orifice and sight glass. You send a slug of liquid into the compressor and you will ruin it along with needing to clean out the entire system before replacing with a new compressor. I have seen my old man do this exact thing on a 4840 John Deere when liquid charging. Luckily the belts on the tractor were old AF and snapped before the compressor was ruined. Newer systems with the Low Line going into the accumulator, you can liquid charge those all day long without risk of damaging the compressor.

[@TT-qo9dv]

You don’t want liquid you want vapor on the suction side.

[@arthurlapp9818]

Liquid in the high side, gas in the low side, I am lucky we have an a/c machine at work

[@waggtech4883]

R134 is a non-azoetropic refrigerant and can be charged as either a vapor or liquid.

[@av6067]

Charge the system with liquid flip the 134 r tank up side down

[@davedunn2124]

Service port is on compressor. Doing so will slug the compressor. It's not the same as if it were near the dryer or accumulator

[@lawrenceashworth7668]

The pressure on the low side should be around 45 to 40 psi when it’s right

[@philipingram1667]

Since the AC was inactive for a long time, I am guessing you have not driven all the moisture out of the circuit. Leave the vacuum pump on overnight and put a drop light / heat source by the receiver dryer to purge it. If this does not work, check for any obstruction at the expansion valve - maybe it is not opening. Can be frustrating but hang in there.

[@travissmith1656]

What the yellow tractor next to the parts cab

[@onealfarms9967]

I know with my experience if you don’t replace the expansion valve and dryer with a new compressor it will not cool well or at all expansion valve when there old the sand out of the dryer will stop them up flush them lines good or you will score the cly walls on that new compressor

[@waggtech4883]

I’d have started with a can or two of Rx11 flush first to blow out the system and old mineral oil. Your welding supply has nitrogen.. they’d likely just let you short term rent the bottle since you’re not going to need it long term. Everyone thinks they can do their own A/C work until it’s actually time to do A/C work.

[@steveschwartz8823]

And you don't need DEF, that's a plus!

[@onealfarms9967]

My chopper air quit working and came close to passing when I fell out of the cap it hot outside I’m about to put a window unit in there

[@brettsnyder9806]

Does that system have a In line filter?

[@carterbaird8672]

Me and my dad got a cat 45 for 18,500 and it's 240hp and we've put like 2 grand in it

[@dexterrunyard3552]

Chris. I'm a ap air dealer and a/I. Hit me up if you need anything. Replace the condessor, receiver dryer and expansion valve. If has been not used in a while. Message me and a van help you with anything you need.

[@lawrenceashworth7668]

It should have a low pressure switch which will stop it from kicking in if there is not enough Freon in it

[@steveschwartz8823]

After you pump a vacuum, charge from the high side. Your low side should come up fairly quickly, this will tell you that your metering device is open and tell you if some thing is not allowing refrigerant flow! Could use nitrogen also before you pump a vacuum! Yes cylinder needs to be upside down!

[@tree5013]

Can you just get hoses made up and put a junked condenser in front of the radiator like most vehicles? It would be cheaper than the fans and more dependable.

[@jacobpoole677]

How’s it going

[@robertwilliamsjr.9195]

did you evacuate the system 1st???

[@keithfrazier2558]

Was gonna say your condenser...would definately get new. You don't want any debris getting in that compressor. Did same thing with my 91 Chevy. At least you have easy access...mine was behind the dashboard ...smh

[@jdjd7127]

Wish I had those skills

[@jeffbute8431]

Use nitrogen when soldering, leak testing with soap and push it through all components to verify blockages before vacuuming system down

[@larryhager7109]

try all state ag paarts in Worthington biggest damn used parts place i,ve seen

[@bobearl7859]

Your refrigerator can for the supply and needs to be turned upside down so you draw liquid into the system you're only getting gas in the system and that's not enough you need liquid

[@fishydubsfishing6516]

When that’s working I want to sit in the ac and eat icecream

[@davedunn2124]

Alright. For all those HVAC guys saying charge with bottle upside down. Why?? After initial charge if you do so while running the compressor you will slug it trying to charge on the low side. The service port is right on the compressor. It's not a chiller. We were taught to initially charge with liquid on high side. Then turn it back over and charge with low side in vapor. Guess I was taught wrong too

[@Jozomo]

Where is Yanko? Lots of your viewers watch because of him. Not even a shout out to your co-star. I have to give you credit about wrenching on all your stuff, just give rad shop a phone call and see if they have any experience in A/C clean outs. When I saw you splitting that unit for clutch with no shop and no help and no special equipment, plus never seen or done it, well you have some B--ls. Congrats keep them coming.👍👍👍

[@eddiereichel9354]

You have to have air flow through evaporator

[@av6067]

134 a when it gets hot it turns into wax when

[@patrickaherne3598]

I was dead wrong on the AC system. I thought for sure it was going to leak.

[@shaynethornton4252]

Maybe a high pressure switch

[@lprock4730]

If a system is empty and you don't have nitrogen, use shop air to find the leak. Yeah i know, but it works.

[@jameslcoble248]

Be nice if someone made an aftermarket condenser that will work or someone that can build one for you that will work that is affordable.

[@gregf1349]

Our 6030 air conditioning work great when it was new in 1975 after a couple years it never worked properly one problem after another we could have spent around 25000 one keeping it going get a big red dot air conditioner and get all that old junk off there they are not to badly priced

[@lawrenceashworth7668]

Probably the condenser stoped up

[@randyreaves7496]

Did you change the office

[@randyreaves7496]

Did you change the orifice

[@davedunn2124]

My guess is your expansion valve isn't opening. Hence the blockage.

[@brianrance]

Try filling one of the plugged condensers with Evaporust for a couple days and then drain it and try blowing it out again.

[@chuckfairchild7561]

Sounds like a bad txz not opening up

[@adejohnston6831]

he put a brand new one in

[@DW-bo3qw]

More than likely some debris got in the valve upon charging

[@frankwoodward9914]

Duffy can you pull one out of a car and rig it up

[@stanb2464]

You can wrench the 7520... you can even paint the 7520... you did the clutch... tell me a field you farm that you need higher or horses? Maybe faster but, you'll get the ac/heat running! 7520 rolls down your roads.

[@jeffbute8431]

A steady flow of nitrogen like you blowing through a straw is required when soldering AC joints otherwise they will oxidize and fail IMPORTANT

[@jakiefunderburg725]

And go in through the high side until your suction rises

[@danbonikowske5870]

Evaporator valve

[@randydrinnon4000]

U have a restriction

[@gary98837]

Get some r 12 refrigerant and you would be fine.

[@randydrinnon4000]

Your not going to be able to clean it . It may have metal jammed in it don’t risk it

[@joeskretkowicz3218]

flip it over chris the tank

[@ashleythompson5550]

Thats what u get into when u try get ac on the old stuff window unit. Lol

[@anthonybarton2103]

Junk Condenser maybe

[@bengovotski7442]

First!

[@arthurkeler1456]

You sure have a lot more patience than I'll ever have!

[@jeffeshbaugh441]

you have a blockage

[@av6067]

Forget about blowing it out its junk