Yong Heng Air Pump - Help

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Myrkul
    2026 ICD Sponsored Team
    • Jul 2020
    • 905
    • Jaegers
    #1

    Yong Heng Air Pump - Help

    Well, nobbie333recently borrowed me this Yong Heng Air Compressor, that was given to him by a friend who said it was working years ago.



    After a quick oil change, and adding a water cooling system, I feel like I am missing something obvious.

    It does turn on, and I have figured out the moisture Valve and the pressure valve. The steel hard lines heat up extremely quickly....it seems to output almost zero pressure though? It definitely outputs a bit of pressure, but less then even a regular compressor does. Leaving a tank on it for 5+ minutes does nothing. There were no obvious leaks when I sprayed it down with soapy water.

    Am I missing something obvious?

    Any tips or tricks would be appreciated.

    Tags: None
    • Chemical-x.....ahain
      MCB Member
      • Mar 2023
      • 504
      #2
      Have you looked for anywhere that its venting or perhaps has an open valve? I dont have a home HPA system so I can only speculate. also have you examined the hose itself to make sure its got the Oring in the QD or that the ends are tightened?

      -----------------

      fwiw there are screws missing from the cover, have you investigated the inside to see if theres a trouble sign within?

        Comment

        • Myrkul
          #2.1
          Myrkul commented
          05-10-2026, 11:49 AM
          Editing a comment
          I have, even sprayed it down with soapy water looking for leaks but nothing seemed obvious.
        • Chappy
          Overmoderator
          • Jul 2020
          • 1283
          #3
          Is there air passing thru the system with no pressure? When no tank is hooked up and you close the valves can you feel airflow out the nipple?
          There is a filter in my vevor(yh knockoff) in the top of the condenser block on the left. If this clogs I believe you can have this issue.
          If not that I would check the safety relief valve. if that leaks youll never get pressure.
          My recommendation would be to order a parts kit and rebuild it, they are not hard. But don’t be surprised if it tops out at far less than 4500 after a rebuild.

            Comment

            • Myrkul
              #3.1
              Myrkul commented
              05-10-2026, 11:48 AM
              Editing a comment
              Yes, some air is passing through, but it can't be more then like 20 psi. I can feel it if I put my hand over the fill nipple.

              That filter sounds like a VERY likely culprit. I'll check that and report back. I'll double check the safety relief valve too.
            Previous template Next
            Working...