FREON QUESTION
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=48487
Printed Date: 27 Aug 2025 at 4:42am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: FREON QUESTION
Posted By: SIMPLICITY
Subject: FREON QUESTION
Date Posted: 04 Apr 2012 at 9:23pm
|
HELLO ANYONE IN HERE EVER CONVERTED A R-12 SYSTEM ON A 70 SERIES TO 134A ? IF SO DID YOU CHANGE THE EXPANSION VALVE ? IF VALVE WAS CHANGED ANY SOURCE AND PART # WOULD BE VERY HELPFUL, ANY OTHER TIPS WOULD BE VERY APPRECIATED . |
Replies:
Posted By: MACK
Date Posted: 04 Apr 2012 at 9:36pm
| Have converted alot by putting adaptors on lines and a new receiver dryer. MACK |
Posted By: LouSWPA
Date Posted: 04 Apr 2012 at 9:40pm
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No, you don't need to replace the expansion valve. Actually, there are now some reasonably priced replacement alternatives for R-12, rather than converting to 134 ------------- I am still confident of this; I will see the goodness of the Lord in the land of the living. Wait for the Lord; be strong and take heart and wait for the Lord. Ps 27 |
Posted By: dad2many
Date Posted: 04 Apr 2012 at 9:44pm
| The drop in replacements for r-12 a very reasonable compared to market price for 134a now. With the conversion the charge quantity is different and the valve ports need to be change. Other than that not a big deal. |
Posted By: Eldon (WA)
Date Posted: 04 Apr 2012 at 9:51pm
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Anyone need any R12 - I have 3 cans here.... ------------- ALLIS EXPRESS! This year: |
Posted By: DouginIL
Date Posted: 05 Apr 2012 at 9:08am
| Eldon, I sent you a PM. Doug |
Posted By: Moonlighter
Date Posted: 05 Apr 2012 at 11:10pm
| Has any one heard of Red tec read about it never used it someone said it might be dangerous like anhydrous any ideas. Seems much cheaper |
Posted By: Dave H
Date Posted: 06 Apr 2012 at 6:59am
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google up Freeze 12 That is what I put in the neighbor's R 12 farm systems.
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Posted By: JimD
Date Posted: 06 Apr 2012 at 9:11am
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I have a can of freeze 12 sitting on the shelf. Let me know if someone needs it. I would have to lookup a fair price. ------------- Owner of http://www.OKtractor.com" rel="nofollow - OKtractor.com PM for an instant response on parts. Open M-F 9-6 Central. We have new and used parts. 877-378-6543 |
Posted By: JimD
Date Posted: 06 Apr 2012 at 9:12am
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We could get it wholesale, but I was told it was stopping production so I bought what I could. The 1 can is all I have left. I should also mention, I can get very reasonable prices on tractor AC parts. ------------- Owner of http://www.OKtractor.com" rel="nofollow - OKtractor.com PM for an instant response on parts. Open M-F 9-6 Central. We have new and used parts. 877-378-6543 |
Posted By: mlpankey
Date Posted: 06 Apr 2012 at 9:29am
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put 134 in it with a oil additive to make the mineral oil compatible and donnt look back. Some of the blends leak one blend more than the other and can't be toped off . So if you have a miniscule leak every season youll have to put a full charge in instead of a oz or 2 . ------------- people if they don't already know it you can't tell them. quote yogi berra |
Posted By: DouginIL
Date Posted: 06 Apr 2012 at 3:54pm
| Where can you buy the mineral oil additive? Is it a Brand name or what is called? Thanks! |
Posted By: mlpankey
Date Posted: 06 Apr 2012 at 4:18pm
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The automotive parts stores like oriely or autozone in this area have it. It comes in a black tube you screw it onto the schrader valve fitting then turn a nut with a socket on the back to compress the additive into the system. I think its PAG oil from memory but not a 100 percent certain just ask a good parts guy with the info I posted and he should be able to get you hooked up with it. ------------- people if they don't already know it you can't tell them. quote yogi berra |
Posted By: LouSWPA
Date Posted: 06 Apr 2012 at 5:14pm
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actually, I've evacuated and recharged several systems w/R-134 and nothing else, and so far, have never had a problem. Mitch does bring up a point, though, systems designed to run w/R-12 will quite possibly require occasional top offs as the R-134 molecule is much smaller than the R-12 and will sneak out of places that the R-12 couldn't ------------- I am still confident of this; I will see the goodness of the Lord in the land of the living. Wait for the Lord; be strong and take heart and wait for the Lord. Ps 27 |
Posted By: mlpankey
Date Posted: 06 Apr 2012 at 5:19pm
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I need to clarify that a little refrigerant blends will need the whole charge put in everytime with a leaky system . single component refrigerants like 12 and 134 can be topped off by adding a oz or 2 . if thats all that has leaked out. Blends not the case. heres what i was meaning according to Technical Chemical freeze 12 is 80 percent R134A and 20 percent hcfc-124B so when it leaks out is whats left the 80 percent 134 or the 20 percent r-124b who knows. ------------- people if they don't already know it you can't tell them. quote yogi berra |
Posted By: LouSWPA
Date Posted: 06 Apr 2012 at 6:17pm
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good point Mitch. ------------- I am still confident of this; I will see the goodness of the Lord in the land of the living. Wait for the Lord; be strong and take heart and wait for the Lord. Ps 27 |
Posted By: Brian Jasper co. Ia
Date Posted: 06 Apr 2012 at 6:25pm
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PAG oil is what all automotive systems run except for hybrids. PAG can cause a loss of isolation so POE is used. I've converted many 12 systems to 134 with only new valves and evac and recharge. In most cases 80% of the R12 capacity is what R134 charge ends up being. ------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: mlpankey
Date Posted: 06 Apr 2012 at 9:49pm
------------- people if they don't already know it you can't tell them. quote yogi berra |
LouSWPA wrote: