I have to wonder why you changed it over in the first place. Did you have leakage? Compressor failure? Leaking hose(s)? Having said all of that, here is a quick primer on A/C systems..... First, the system works on compressing the refrigerant into a hot gas. This gas is then condensed into a liquid. The liquid is then fed through a metering device into an evaporator where it then returns to a gaseous state. When this happens, it absorbs a tremendous amount of heat. This is what gives you the cooling effect. Now, two things are DEADLY to an A/C system: air and moisture. Air is a non-compressible gas in this context in that it CANNOT be compressed into a liquid. Since it is evaporation of a liquid that does the real work, air simply reduces efficiency to the point that you may not get any cooling at all. Moisture becomes a problem as it will collect and freeze at the point of evaporation and ultimately clog up the system. Moisture also reacts corrosively with R-134a oils to drastically shorten compressor life.
So, to solve your problem, do the following: 1) Use a recovery machine to remove all old refrigerant and oil from the system. 2) Evacuate the system to remove as much air and moisture as possible. 3) Add a proper oil charge for the system. Typically, there are specifications for how much each component will take. 4) Charge up the system using GAUGES, not can count or "seat of the pants" guesswork. Use a charging chart to determine the correct pressures to achieve for your ambient conditions.
A word about oils: R-12 systems used a mineral oil. This oil circulated through the system and kept the compressor lubricated. R-134a systems cannot use mineral oil because it will not circulate in the system using R-134a. As such, use of ester oils or PAG oils is required. These oils WILL circulate through the system and keep the compressor lubricated. PAG oils and mineral oils are incompatible. Ester oils are somewhat compatible with the left over mineral oil that may be still in the system.
FYI: Most work on tractors and implements are effectively repaired with "farmer fixes." However, systems using electronics and refrigeration systems are NOT compatible with "farmer fixes." These systems need to be serviced by knowledgeable and qualified repair personnel. Don't mean to hurt anyone's feelings. That is just the way it is. Sorry.
Upload one or more videos to your post. Photo filesizes should be less than 300K and Videos, less than 2MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
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 - Talk of the Town: The Saga of Grandpa's Tractor - by The following saga is from the Tractor Talk Discussion Forum. Someone. The saga starts with the following message: Hey guys I have a decision to make. I know what you all will probably suggest and it will probably agree with me way down inside, but here it is. I have a picture blown up and framed in my "tractor room" of a Farmall M. It was my Grandpa's tractor, of which whom I never got to meet. He froze to death getting this tractor out of the barn to pull a truck out of the ditch before I was born. Anyway my dad and aunt had to sell it at the auction,
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[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.