Onboard Air Anatomy - Air Free
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There is no oiling system in the A/C compressor, per se. It is designed to constantly circulate oil, so whatever oil is in the unit gets pumped back out into the system. It doesn't matter what compressor you use, you should put a filter on the outlet (discharge) side of the compressor. This coalescing filter has a full aluminum body, the foam filtering element is rated to 250 degrees, and the sight glass is small. The oil in the compressor can eat large plastic sight glasses, and the heat created from the compressor can melt lesser filtering elements. There is an arrow on top of the filter that shows which way the flow of air needs to go. View Related Article
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