I have a quandary.....My old BM23 is out of freon charge after a "re-fit" about 3 years ago, suspect high side port Shrader valve (it felt loose and could be tightened). When hooked up to gauges, it will keep a "test" pressure of 50 psi (not tried higher yet) for 72 hours plus with no change, but will not hold a vacuum for more than a few minutes, both tests done with the same set up, with both the hi /lo side manifold valves locked out (all hoses still connected to the vac pump and the hi/lo ports). Do I have a leak in the system, or are my various hoses and connections just not suitable for vacuum sealing?
Any input would be appreciated.
Any input would be appreciated.
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