For this conversion to last a few years ,the system needs to be taken apart and flushed out with a solvent. Then get a rebuilt compressor, a new accumulator or dyer, orifice tube or expansion valve(depends on which system set up you have) and add proper oil and type of oil. Replace all orings. Also fix/repair leak then pull a vacuum,then pressure test with nitrogen to check for leaks and then charge system with R134a.
This system will hold about 80% R134a compared to R12. The system needs to be flushed cause the oil used in R12 reacts with oil used in R134a . Some of the older compressors will leak with the use of R134a. Its not that hard to DIY.
This is one of those things you can throw a lot of money at before you get all leaks and issues resolved ( do not ask how I know this). Go to half price books and get a AC repair manual and read and read some more. To pull a vacuum go to harbor freight and get a compressor operated vacuum device/puller. You can get gauges there too.
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Today's Featured Article - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
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