I am an auto tech and have literally performed 100's of retrofits over the years. Here is what you need to do....
1. evacuate the system
2. pull a vacumn to "boil" off any residual moisture
3. charge retrofit oil, most kits will use ester oil as it is compatible with both R12 and R134a oil
4. charge refrigerant to 80% of the R12 capacity.
That is it.....Done. No need to flush as the R134a won't "carry" the R12 oil so it just sits in the bottom of the system, that is why you need to add retrofit oil, it is also part of the reason you only charge to 80% capacity, the old oil is taking up some of the capacity.
When we first started doing these there where a lot of myths around about having to change lines and compressors and anything else you can think of, it is just false. the only real difference in the two systems is the oil, the seals and hoses are all made of the same material.
I will however say that it would not be a bad idea to change the receiver/drier or accumulator (whichever your system uses) This part contains a dessicant to absorb moisture, If the system has been flat or open for any length of time the dessicant is most likely saturated and can no longer do it's job. This however has nothing to do with the retrofit, just a good preventative measure on a system that has been idle for a long time.
Hope this was helpful, sorry for being long winded
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Product Review: Black Tire Paint - by Staff. I have been fortunate in that two of my tractors have had rear tires that were in great shape when I bought the tractor. My model "H" even had the old style fronts with plenty of tread. My "L" fronts were mismatched Sears Guardsman snow tires, which I promptly tossed. Well, although these tires were in good shape as far as tread was concerned, they looked real sad. All were flat, but new tubes fixed that. In addition to years and years of scuffing and fading, they had paint splattered on
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
