So my yong heng has to get to 300 bar or so to bring my wildcat to 220. Has gotten progressively worse. Is it ok to unscrew all th fittings to tape them?
Yong Heng leaks?
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Tape them? You can't tape 4500 psi. Use soapy water or leak spray and spray at all the fittings. Most of the times the fittings is just loose and need to be tighten.
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I don't recommend doing this a lot, but try turning the Yong Heng off while there's still pressure inside it. These things are so noisy and shake so much that it's hard to find leaks while they're running. And like ImpactX said, spray some soapy water near suspected leaks.
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The most common & successful method of finding leaks on the YH is to use a dead head plug on fill whip, let pressure build substantially then turn off YH while under pressure then use soap spray on every single external fitting & connector, anywhere it could leak. A common place for leaks is the dowty seal (bonded washer) on top of High Pressure cylinder. Usually just needs tightening or replacing that seal which should have come with YH spare parts. DON'T make a habit of stopping under pressure but it's OK in this case.
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