Found air leak
Not on my coach but on my crane. The information might help someone find an undetectable leak. After chasing and fixing leaks for about a week I was about to give up. I could hold air down to 30 lbs. over night but could not find any more leaks. Finally today I put a regulator on my shop air and set it to 130 lbs. which is the way I found all the other leaks. This time I took the air filter off the air compressor after disconnecting the output air line to eliminate the check valve. I still had air coming out of the intake port of the compressor. The line to the d-2 governor cutoff port has constant pressure and my unloader valves are letting air pass through. My compressor is a Haldex el1300 but the air compressor systems all work the same. I ordered the unloader rebuild kit and gaskets from Findit parts. I hope this fixes the last of the air leaks
Topic: Found air leak