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John Deere Tractors Discussion Forum
Show Parts for Model:

JD AC , how to retrofit r-12 to r134A ?????

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4020guru

02-04-2013 11:17:18
216.226.89.76



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I am planning on replacing the r-12 refer to r134a. I have retrofitted home air conditioning and the question is, what is the process with a 4430? I will evacuate the system, will the compressor need to be changed? How about the expansion valve ? Do they have an expansion valve or a capillary tube?




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Bob

02-04-2013 19:55:13
64.255.159.192



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 Re: JD AC , how to retrofit r-12 to r134A ????? in reply to 4020guru, 02-04-2013 11:17:18  
A few choices... Keep the original mineral oil refrigeration oil and run a b*u*s*t*a*r*d refrigerant like Freeze 12, or get all the mineral oil you can out of the system and install POE oil and R-134A, or COMPLETELY flush the system of mineral oil, replace the compressor and dryer, and install PAG oil and R-134A. The BEST and Deere-approved method is the latter.

DO NOT mix the original mineral oil and PAG oil. (Can you say "Jello"?)

...Bob, refrigeration tech, certified in mobile and stationary systems.

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4020guru

02-05-2013 14:03:48
216.226.89.76



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 Re: JD AC , how to retrofit r-12 to r134A ????? in reply to Bob, 02-04-2013 19:55:13  
Hey Bob, what is a BUSTARD refrigerant? Do I have to replace the compressor to get all of the oil out ?



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mattwillson

02-04-2013 16:43:21
74.15.76.52



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 Re: JD AC , how to retrofit r-12 to r134A ????? in reply to 4020guru, 02-04-2013 11:17:18  
Just vacuum system really good and load it with r414a, it works well for me.414 isn't much more than r12 and is basically a direct replacement.



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BushogPapa

02-04-2013 16:42:34
173.88.51.117



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 Re: JD AC , how to retrofit r-12 to r134A ????? in reply to 4020guru, 02-04-2013 11:17:18  
I have never done anything but charge with R-134, even if some R-12 was still in there..NO Problem.. R-134 does need to run a higher Low-side pressure and I feel it cools better... I have 1/2 a BOTTLE of R-12, if anyone wants to buy it...!!

Ron..



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4020guru

02-05-2013 14:04:58
216.226.89.76



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 Re: JD AC , how to retrofit r-12 to r134A ????? in reply to BushogPapa, 02-04-2013 16:42:34  
Hey Brushhogpapa, how many OZ. are in your 1/2 bottle ?



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BushogPapa

02-06-2013 12:05:59
173.88.51.117



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 Re: JD AC , how to retrofit r-12 to r134A ????? in reply to 4020guru, 02-05-2013 14:04:58  
ell, it was, I think a 20 lb bottle..I am sure it is at least 1/2 full..

I could weigh it..

Ron..



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mecanik69

02-04-2013 13:26:19
12.23.120.129



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 Re: JD AC , how to retrofit r-12 to r134A ????? in reply to 4020guru, 02-04-2013 11:17:18  
leave it r12 r134a sucks.



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Tx Jim

02-04-2013 14:12:58
67.142.163.27



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 Re: JD AC , how to retrofit r-12 to r134A ????? in reply to mecanik69, 02-04-2013 13:26:19  
My 4255 cools better on R134a than it ever did on R12.



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