Trying to keep the operator and engine cool on the new 850j- proves to be no easy task!!

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Fixing the ac in the 850j turns out to be a bigger job than expected.
#newdozer
#acrepair
#DIYproject
#deere
#howtofixac

[@JasonGunn418]

Mike also another tip, as I did work in the AC industry for a bit. Just as an example if you have a digital readout of your AC temp and the lowest is 60, put it on like 63 or 64 to prevent the dryer from freezing, and use the recirculation button every now and then, for colder air. The system works with less stress if you recirculate the air already inside the cab. Also after a while if you have 3 to 4 selector settings for the fan, the lower the colder. Especially for a moving car.

[@AquaPeet]

Pulling stuff apart is easy, but putting it back the right way is something else. Top job Mike, big fat thumbs up!

[@howardbain6516]

I kept shouting at the screen for you to clean the condenser coil. You finally heard me toward the end. I feel much better now because I'm a retired a/c tech.

[@reddog376]

I was thinking replace heater core while it was apart. My luck this winter I would be putting heater core in it and lose my freon.

[@thomasdesmond2248]

The purpose of that top hole Mike. Is to add a chemical and biological air filter. The issue is you now have no pre-filter. To filter dirt out prior to air coming in to the fans. May I suggest getting a round filter and housing off of an old semi. This can be mounted on top. If it doesn't cause clearance issues. If it does simply pipe it and place elsewhere. Doing this will keep your entire system much cleaner. Less maintenance. God bless

[@dalejohns2758]

Hahaha

[@pamike4873]

That's where ours went. Well, the governments, anyway. I was told by another commenter it's for a snorkel, but I'm not familiar with that. Our cab NBC filter was mounted to the roof, and believe it or not, even the engine intake had its own system as well. Most equipment today comes with positive pressure HVAC systems, but for older equipment that didn't, wow does it make a difference. With the CBRN filter, (CBRN now. It was NBC) and positive pressure, I swear to pete that air was the cleanest I've ever breathed, lol. And since the cab was pressurized, you could run through a dust storm and come out the other side as clean as you went in it. The electronics would last forever pretty much. Especially switches.

[@thomasdesmond2248]

@@pamike4873 you are correct. The snorkel was completely incorrect. A snorkel would only be for the engine. It would never be connected to HVAC. Also a snorkel would be useless being higher than the exhaust. Water would simply come in the exhaust. Yes the pressurized systems are great. God bless

[@JasonGunn418]

Both of you are WRONG, if it were for a biological air filter, this system would be totally sealed off, and you would see a ton of rubber seals around the unit. It could not be for a snorkel as it doesn't need to be sealed from moisture or being submerged. If you take a picture of the section he removed and google it it was used for Waste management dozers to help with cleaner air into the system to reduce the dust and dirt. Sometimes you guys really go off the deep end with your BS, and probably never served a day in the military. NBC systems are totally seal with all kinds of spray seal and rubber, a dead giveaway, if you ever served.

[@vaughnhill3437]

I know this much about ac work. Im a residential repair man for ac and if your coil inside is that dirty its a very good chance your compressor may have issues from overheating it. Obviously that poor machine was not ever properly maintained and by looking at the ac system it has been in the desert atleast half of its life

[@Dan-ud8ob]

Clearly one of your best !..watched it twice

[@DirtPerfect]

thanks!

[@sonnyblazer5504]

Yeah, you're right! I just love when he REALLY gets into something. It's like, JUST STAND BACK cuz he ain't leaving a stone unturned AND with CLEAR & PRECISE details of what he's doing and WHY! You know, it's one thing to build a great KZbin channel but this guy turns it into an "Online University"!!

[@python3574]

Not sure if it was military or not, but whoever ran it in the coal environment put that external air filter on the AC unit....then apparently didn't keep it maintained, based on how bad that unit is packed with coal dust. That can be a problem as coal dust mixed with water is acidic. You can see evidence of that in all the JD yellow areas that weren't painted, and around that filter inlet fitting they installed that are all corroded and the paint lifted. IMO, I would try to steam clean out every nook and cranny of that machine, under every cover, etc... to get all of that out of there, especially inside of the cab. You do NOT want to be breathing coal dust that is blowing around via the ventilation system. All that said, looking forward to seeing Sgt. Slaughter bringing the violence to some dirt once it gets back from C&C.

[@thomasdesmond2248]

No the inlet was military. I have seen many of them.

[@sonnyblazer5504]

Many times at many military bases & installations, CIVILIANS are hired to perform work with equipment such as this. I would say this machine had a decent life based on how it runs and what DP checked out prior to purchase. PLUS, if solely military the thing would have been subjected to INSPECTION and much of the poor maintenance caught and not allowed. DP did WELL for himself!

[@michaeld_68]

Is he calling it Sgt. Slaughter ???

[@dianaharper1791]

@@sonnyblazer5504 ;

[@DougT25427]

You are much more gracious and forgiving with the seller than I would be. The truth is they are crooked liars. When a used equipment seller states “We ran it through our service department” everyone assumes they mean they have found and fixed the obvious flaws. Hopefully your experience will persuade others to steer clear of them.

[@DirtPerfect]

Stay tuned

[@av8tore71]

If this was a military dozer I know that regular soldiers would have maintenance pull the radiator cover off but to take the fan off would go through 3rd shop which is more in depth maintenance personnel with more knowledge than regular maintenance personnel. At least this is the way the Army has it. The soldier who would operate this dozer would do PMCS or Pre Maintenance Checks & Services usually on a Monday and by the operators manual check ever but of the machine and if there are problems maintenance would work work on it but AC is not high on the list to fix nor cleaning good

[@jerryhammack1318]

Lil tip paint top of cab gloss white helps reflect old daddy sun! We do this in Texas You will be about 20 to 30 degrees cooler!

[@brentking-gmailking2570]

Great video Mike. I hope it stays good and cold for you. Have a great day.

[@DirtPerfect]

Thanks 👍

[@f250ford2004]

Glad you got it all working, you said last nite that some at the dealer were fired for good cause!!!!!!!!!!!!

[@shirleyc7175]

You worked so hard , you love a challenge and you won.👍

[@thomastrimberger157]

I thought you released your Freon to the atmosphere when you opened it up ( and wouldn’t get a Christmas card from Al Gore) but then remembered it all leaked out already at the evaporator manifold. Great work!

[@robertneumann7782]

I like your selection of slugging wrenches

[@oldfarmer4700]

Unlike a car the machines that work in dirty and dusty environment require cleaning of all coil's every now and then. The John Deere dozer and highlift I ran for a friend after regular work hours at least once a year I would wash the ac coils and radiator and hydrolic cooling coils. Makes a big difference on the life of the machine and operator.

[@pnwRC.]

WOWZERS! That was a PITA to get er properly functioning!

[@teebugg66]

So glad you got the bugs worked out of the ac, it’s a nice feature to have!

[@davewebb5737]

Nice job I don’t know how you do it you were lied to about the condition of the dozer. and there you are Big smiles. You are a great guy Keep the videos coming

[@DirtPerfect]

Thanks 👍

[@mikenixon9164]

Really like a complete video like this. Good video.

[@DirtPerfect]

Awesome, thank you!

[@raymondgochenour8725]

Nice and cold AC. It’s a good thing.

[@jeffharvey6768]

Great job Mike..... now I need you to head down to Chris in North Carolina to help him get his DEF problem fixed...lol

[@jimp.4531]

I think you had a lot of fun with that re-construct.

[@jonathanlanglois2742]

The dryer removes moisture in the system. It is a good idea to change it every time you open up the system to the atmosphere.

[@barryhansen6854]

Man of many talents master of some Mike, good thing you have a never ending supply of those T-shirts you wear otherwise you would never be clean. Hope you have a separate washing machine for them, I thought you were designing a new look while water blasting the radiator.

[@ronwhewell9987]

Cool job mr DP

[@danielpullum1907]

My hat (my favorite cowboy hat-s) is off to you on your attention to maintenance~~~~!!!!!!!!

[@jimmycurran5355]

Awesome job. Glad you got it.

[@jayeff3196]

If your gonna fix it....do it right....you feel so much more happier when you do a job right....we can tell you're a happy man today....😊...🏴󠁧󠁢󠁳󠁣󠁴󠁿

[@joshdurbin4662]

On my 850k that is just a red dot system but they moved the heater core under the seat so the a/c comes down from the roof and the heat comes up from the bottom. Simple engineering and I love it. The a/c is so cold I only run the fan motor on the lowest setting and the temperature is almost completely out of the blue and in the red, that ole girl still dogs the windows lol

[@sonnyblazer5504]

You know, MIKE, anyone can spend more money and buy everything DONE (or go to a reputable DEALER) but watching & sharing with you and hoping and redoing is SO motivational for US and I could hear in your voice the COLD AIR on your FACE when you say down & felt it! You 'coined' the phrase, "A winner never quits and a Quitter NEVER Wins"! That's YOU! Congrats!

[@DirtPerfect]

Thanks buddy appreciate that

[@murrayhall908]

Yep I'm excited too!!!!!!!!! What a marathon to resolve the A/C and all the associated problems. Just re-inforces your original comments of the dealer puttting it "through the shop" (I don't think!!) I am always amazed at your comprehensive knowledge and ability to overcome the various problems that arise on this and many other of your maintenance videos. Really well done you. What satisfaction this task must have given you!! Think you deserve a long cool beer after that episode. Cheers from Scotland. Stay safe and welol.

[@SPUDHOME]

Usually pressure wash is performed before repairs. Get the dirt grease oil and contaminants away then repair. Dirt perfect works with dirt so they work in it then clean wierd

[@bobtucker9188]

A clean machine is a happy machine!

[@jerrodsimmons8356]

You never cease to amaze me DP! You’re so talented in many ways. Tons of knowledge & willing to share it. That’s just awesome & entertaining. Thanks for making my Saturday night by watching old videos!

[@DirtPerfect]

Thanks

[@dansevern3291]

Thanks for reminding me why I haven't messed with an a/c system since about 1988. I love having a/c, but HATE working on them, because I get that same thing, what starts with a slow leak ends up replacing most, if not all of the major parts!

[@northernliving2387]

John deere should make that system more accessible so you can clean the condensers for easy cleaning.

[@budlvr]

Yoeman's work Michael ! You GOT-ER-DONE !

[@1paultv22]

I remember back in the mid-1980s working as an Auto Mechanic at a local gas station. We would order a lot of parts from a guy we called "Ronnie Wrong Parts," because no matter how specific we were with the parts numbers, he or one of his delivery guys showed up with the wrong part. It got so bad that we would order the part from him (because his store was very close)and another auto parts dealer at the same time and we would tell Ronnie this and that we would buy the parts from the one that got there with the correct parts first. The funny part about that is that he would make it there first most of the time but still with the wrong part.

[@willb3018]

Can't wait to see it on the job.

[@jamessievers3899]

Those air filters look clean!

[@ronkurey8840]

Sorry, you did wash the condenser. Just a little pointer…on “O” rings and flare fittings.. coat with refrigerant oil for better seal. Just a hint..in HVAC business for 48 years… watch you channel every day..big fan. Just trying to help

[@davidhill4711]

Good Job Sir. You patience, logic, and determination got you to the end game, AC fixed. Now we know a little about other challenges coming but take the win for now.

[@herbybrooks5131]

Put in a on and off valves in will help the ac blow colder air and turn it on in the cold for heat

[@marknewell7355]

Really enjoyed this and gave me confidence to do one on a old foden 3300

[@davidmorse8432]

That hole in the top of the ROPS is a machine gun mount.

[@richardmanson5285]

You are the man Dirt Perfect! Your ability to deal with a myriad of problems is awesome. "Git er done"! Very impressive!

[@waltermattson1730]

I hope it is working good. Nice video explaining how it works too.

[@DirtPerfect]

Thanks

[@rickwalling1148]

When ever air conditioner hose are removed you must remove and replace the dryer! It’s designed to remove moister from the system

[@josephdriscoll8527]

I recommend the next time that's on the bench go 1 more step an pull the blower clean the wheel fins, lube if needed the air will flow like new

[@paulr5875]

Thanks for the great video Mike!

[@DirtPerfect]

Thanks buddy

[@gotdeeres]

I never order parts without researching the correct part number. I now email my parts list to my dealer rather than talking to them. I wasted a lot of time when I would receive the wrong parts and have to make a second trip to my JD dealer. The on line ordering I used for many years, no longer works with the new AG-Pro dealership. Looks like they did not change the ac filters very often either.

[@kevinkenyon7045]

Mike a lot of work pays off! Good to see you happy. Thanks for sharing. Kevin

[@gavhirt9168]

Up its a sandbox unit its a safety lite mount

[@kevinpatmeech5014]

Your diligence reminds me of my earlier years, although I was mainly involved in woodworking. I enjoy watching your videos. It reminds me of my younger years.

[@richysee]

Setting up and re charging an AC is not a simple matter of pulling something of a vacuum as you did. It takes a qualified and experienced hvac expert to properly set up an ac unit especially one in a mobile situation. anyone with basic gear and a few cans of freon can get an ac to produce some cold air. But, to get the unit working properly so that there is no long term damage sustained by the compressor it, once again, takes someone with the right knowledge to set your system up for long term reliability. While I'm Australian, the same laws of physics apply and they are timeless and without boundaries. I am a qualified hvac engineer and I have worked in areas from basic domestic refrigeration through container and large industrial plant. Do yourself a long term favor and get a local refrigeration guy to set your system up properly.

[@badmonkey3669]

Main thing moisture does inside a system is combines with the oil and refrigerant and makes a acid that then eats up your system from the inside out

[@TheSnakeman3]

Great job on the AC repairs. I too do all of my AC work and it saves a boat load of money doing it yourself. I used to wrench for a living in my 20’s and do all my work myself - now 61 years old.

[@nathannorquist5877]

lesson learned, always take the old parts with you and when you get the new parts check them in the truck before you go home so you don't have to make 2 trips

[@FishFind3000]

Even if he opened the box he would have noticed at least one was wrong.

[@alberteinstein9045]

You sure got a lot of work done without mbts constantly whining. Good job.

[@wallbawden5511]

okay i will have a stab at the vent thing on the roof and say it was for a filter for gas wore fair the rest of the unit should have been seal by a flap or some thing like that so it only draws air from that filter this is my best guess as here in AUSTRALIA we don't have that fancied stuff as it coasts to much we get the good old gas over all's cheers if some one else knows let us all know cheers also a trick we used on our small machine was you get a piece of 1 inch filter type stuff and glue it around the edge and it did keep a lot of dust out the cooling and heating coils you also need to cut some sort of access hole to it so can wash it out from time to time we did it at service time you will have to make a cover for the hole but it not a hard job hope this helps in future as i know this video is of the old type but some thing to keep in mind for a future project cheers

[@BlueDually4x4]

I am leaning to it got ran through the shop on a Friday just before quitting time. But it seems to be running good now.

[@TheHelgadog]

Great work on getting all the issues fixed. Cant wait to see the 850J in action. Hope Mr. Jerry is happy with it and yourself as well.

[@jamessievers3899]

That is going to run like a new machine!

[@jameslindley924]

Worth all your effort Mike !! Job Done

[@DirtPerfect]

Thanks

[@terryrogers1025]

If it’s man made it can be repaired, no question about it, however, the limiting factor then becomes time and money. In my case I have more time than money, (I hope) so it gets repaired by self. That’s usually the way it goes anyway. Fun to learn new things as you go, nice job once again young man.

[@localcrew]

I think you need to flip your radiator fan over. When I first saw it I thought to myself that I was surprised to see a “puller” style fan on a dozer. Then when you spun it in the correct direction near the end of the video it seems as if it was indeed a “pusher” fan. The fan will still work this way but not as efficiently. Now that the radiator is clean it may not make a difference. However, it may be a good idea next time you’re in there to see if that fan can be flipped around the other way without causing clearance issues. 👍

[@davidmorse8432]

Some of the modern heavy equipment have reversible fans that are driven by hydraulic motors. These fans can reduce clogging by reversing the air flow on a when the computer notices a climb in engine temperature. And they don't even turn when the engine is cool.

[@localcrew]

Humor me. If you happen to get at that radiator again, see if that fan will flip over. It’ll be fun! 🌬

[@williamshomers2680]

I admire your confidence in trouble shooting things you're not too familiar with. Good Job.(as usual).

[@williamshomers2680]

Now go buy your family a nice camping trailer with Air Conditioning . 👌

[@leol1682]

Love this video Mike .have good day .

[@DirtPerfect]

thanks!

[@dungeondark]

You have so much patience. I had a devil of a time figuring out I had a bad battery that was killing the other battery and when I finally got it solved, I got in my car and it was DEAD!! You probably heard me scream all the way from Texas.

[@bump6469]

Thanls for the lesson love how you teach us. I believe C&C will do ya right enjoyed the vidja keep up the hard work. Thank u

[@DirtPerfect]

Thanks

[@morgansword]

Walking in tall cotton with me on this fix. I never dreamed that they came apart that eh hm... easy as in little to lots of nuts , bolts , and some fine work and its a runner. I just never got into the refrigeration portion of things in my day as I don't remember seeing even a place for it one the rigs... washington and alaska being my states of mechanicing, and even owning big rigs in the late eighties never had air on them... it would of been welcome though. Nice work Mike.

[@richardhedrick5601]

There ain't to many people would do the ac like you did good work

[@DirtPerfect]

Thanks I guess

[@DirtPerfect]

😁

[@jacknevitt7384]

This was a great video! Very informative! Stay cool out there!

[@DirtPerfect]

Thanks

[@tbix1963]

Thanks for sharing your thoughts and adventures fixing the new dozer. That first night I was expecting to hear the buzz of little flying vampires. Glad for your sake that doesn’t seem to be a issue. Looking forward to seeing more repair and operating videos. Wishing you and your family the best.

[@DirtPerfect]

thanks!

[@forumbezoeker]

hole in the top you can connect overpressure for attack with gas or other chemicals

[@justinmills8084]

New A/C in the office is a good day. 👍

[@hollandduck79]

from the Netherlands thanks for the video DP

[@cdrillen1]

Impressed you are a lot more knowledgeable then you let on.. I never miss a day on your videos. Keep up the great work!

[@DirtPerfect]

Thanks, will do!

[@raymondbrandt7831]

those cab filters need changed the ones under the blowers

[@maxobara1496]

At least you had a comfortable spot to work on it. That stand was perfect. You got it cleaned up pretty good and MBTS was there in the end for you, as always!!👍🇺🇸

[@martinwyke]

I suspect the purpose of the roof thing is for fitting an external air filter to keep out all that muck you found inside.

[@norinamacdonald8644]

If you buy condenser coil foam cleaner it will clean that to look brand new a buy a comb to straighten the fins you will have great happiness

[@thomasbailey8306]

The AC in those 850 Are COLD...Love Operating My 850K. With a 6 way blade. There Pushing Fools. And climbing Fools as well. I work on the Pipelines and 850K LGP Is a Great Dozer. The old J were also...Before all The DEF systems Garbage...Great Video Hope you changed thos 2 outside filters too. They will effect the AC if not changed regularly..Dependings how Dusty of environment your working in. On how often You should change them.

[@DependableAutoTruck]

have watched all the video on the new dozer hope c&c makes it right shops make mistakes i run a small auto repair shop things happen

[@DirtPerfect]

Yup stay tuned it all plays out

[@edwardgaskin4245]

Nice job Mike.

[@Crewsy]

I took a quick look to try and see any other military dozers with something on top of the A/C unit with no luck (yet). I did see a bunch of C&C videos and during the walk around he opens the engine access door. A couple of them look like the filter housing would fit the original filter you bought so there might be a mid year upgrade or severe duty option that included a larger air filter. My old Acura CSX was a 2006 but the engine and cabin air filters were 2007 spec parts because of the timing it was made and the early change over of some components on line during production.

[@hermanschepers4739]

Had that happen with a Mazda B2200 P/U; midyear suspension part change.

[@DirtPerfect]

Interesting thanks

[@needsaride15126]

Nice choice on the time lapse music. Made me want to watch a Buster Keaton movie. I hope all the bugs are worked. That now it's smooth sailing.

[@tangowhisky14]

Boy that job was a tuff one for us be we did it in the end. Thanks Mike for all your help 😏

[@brianlennox8799]

Hey Mike just imagine how dirty that AC was before they ran it through the shop!!🙈🇦🇺

[@pamike4873]

Haha...

[@lloydwilliams8715]

Good morning DP. Nice to see the upgrade

[@DirtPerfect]

Thanks

[@lloydwilliams8715]

@@DirtPerfect welcome. Looks a bit more than u thought. Am at the spot of those missing washers 😅😅

[@thomasyerbey337]

Hey Mike looks like everything is working great

[@DirtPerfect]

Thanks

[@brackoncorbridge1966]

Hey thanks for the input on issues I'm having on ac on my wifies car.

[@DirtPerfect]

Good luck

[@user990077]

Move to Alaska. The air conditioner in my truck hasn't worked in over 10 years. Two summers ago could of used it for a couple of weeks. But I am south of the interior of Alaska that gets real hot in the summers (and bitter cold -40 for weeks on end in the winter).

[@gotdeeres]

I would keep the old condenser just because..... It looks like just a re-solder would work. I just attempted to replace a hydraulic line to a steering valve on an X595 GT and it is NLA. I searched the internet and found a used one. Three of five lines to the steering valve are NLA or JD's new term Obsolete. Never can tell if you might need it. If you have a spare, the original one will NEVER break.

[@nigelwright4796]

Mike you should always replace your drier. Work on systems in the Navy. Your drier is the only filter on the system, it will obviously take any water out of the system. Old ones never work properly sorry to say. And water in a refrigerant system is your enemy. Many thanks for the channel you keep an old man very entertained. Nigel Royal Navy Old stoker retired

[@DirtPerfect]

Thanks

[@bradstubbings9871]

Awesome job and video, nothing like fixing something someone's already fixed weather right or wrong. But now that it's you gotta fix right , not only so it lasts longer but so it's easier the next time around. Like the splice on the hoses. Hopefully the next failure is something different and not something you did wrong. Pays to do right. Love the video and can't wait to see her in action. Jerry is going to love the A/C and closed cab.

[@ryanv3751]

My first thought would be to look up the part numbers on the filters…who knows if the ones in it were correct.

[@glennhunter7018]

Good video I cannot believe I miss all of this good stuff good job fixing they air conditioner that was A good idea about cutting the houses to make it easier it pays off you will be cool now do you thank Jerry will use it be safe see I told you I will get back commenting I hope you’re ready for the long ones again. be saf

[@lloydwilliams8715]

Jerry might just want to operate it now 😂😄😊😊