Have you ever had a situation where you pressure test a car a/c system with Nitrogen to 120psi and it holds. Then after you vacuum it and charge with r-134a, it leaks and won't get anywhere near the 120 psi you were able to pressure test it at?
When the proper amount of r-134a is added, it will only go up to about 50-60 psi on high and low side after the pressure equalizes and will hold there?
What could this be a sign of?
Could be a shaft seal leaking. Put a shower cap over the clutch and let it sit. Then use an electric leak detector to see if you have a leak.
Are you using a full charge by weight? You never get 120 psi static pressure (unless it is very hot) because the R-134a changes to liquid at a lower pressure than that.
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