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N Central IA | Have a truck that purges about every minute, has new dryer and new line from governor to dryer. No leaks around the fittings or the governor. When it purges it keeps leaking from the purge valve tapering down for about 10-15 seconds, replaced dryer because the original was doing the same and I replaced the valve which didn’t make many difference. Only external air leak I have is from the unloader valve plate on top of the pump, I get about a 1-1/2 inch diameter bubble from there, I assume some has to leak off from the unloader. Can it leak internally through the governor to cause this issue? | |
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Diagnosing semi air purge valve
