I recently came in possession of a Yong Heng compressor. It has all parts and seems to be well taken care of. I changed the oil to royal purple and followed all directions. For some reason though it is not filling anything up. There is pressure coming out of hose, I can feel it but when I close pressure valve and the valve on back end it still does not fill. Any ideas?
N/A Compressor help
- Thread starter AllThingsAir
- Start date
When I first got my used yong heng after it had sat unused for a long time it did the same thing. I hooked a bottle to it to and slowly cracked it just to add a little back pressure and it sealed and it's been fine since. Just a little back pressure should do it, don't dump a bunch on it.
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could you please break that down step by step please? I’ve never done that before. Do I leave the valves open or closed? Turn compressor on? Thank you!
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Start as usual with the valves open and start compressor with no load. Close valves then slowly open a tank to add some back pressure to the line, you'll hear the compressor change sound if it begins to build. Then close the bottle again cause you're not supposed to start under a load less than the bottle pressure. Then stop and restart as normal. You're just trying to add a little back pressure to seal up the seals. If you have a big inline filter I would remove it for this step.
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Very little back pressure , just crack the bottle open as slight as you can , if you need a
BIT more open very little and not to long , you should hear a difference in sound then close the tank and stop the compressor
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A full system pressure test with test plug (pictured), inserted in fill whip (hose) female quick-disconnect, is usual first step in finding compressor problems. Pressurize system, shut down compressor, use soapy water spray bottle to check for leaks. Important to release pressure before restarting compressor. Bringing back test results to forum will help with diagnostic efforts. WM
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I was wondering what that thing was for..okay cool will try both things when I get home thanks
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There is also a forum called
"Tanks , Pumps , Compressors" where this likely be moved to when a moderator finds it. If the plug is inserted , and it builds no pressure look at your burst disc.
"Tanks , Pumps , Compressors" where this likely be moved to when a moderator finds it. If the plug is inserted , and it builds no pressure look at your burst disc.
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What he said 
Also check the Dowty seal (bonded washer) where tubing comes out the top of HP cylinder.
Also check the Dowty seal (bonded washer) where tubing comes out the top of HP cylinder.Upvote 0