I have converted a lot over the years. Some with the whole deal, new drier, flushing system, new expansion valve, either different compressor due to that being the reason for working on it. Some, just evacuated and added R134A. That being said, I have seen some really sludged up systems that have been just adding different refrigerants. Can make a real mess. But, what are you out really, as you may have to give it the works when it fails or give it the works now. The new hoses do have a lining in them to hold R134A. A 85% charge of the max recommended original charge works well. Air conditioning work can be a real pain.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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