Results 1 to 8 of 8
  1. #1
    Join Date
    Dec 2006
    Location
    new england
    Posts
    612

    vacum pump and oil ?

    We carry 7cfm vac pumps in our vans. I've had a few instances where my service hose gets filles with oil when pulling a vac on a small lineset. Is it the position of the vac pump and my manifold causing this. TIA Fitz

  2. #2
    Join Date
    Mar 2007
    Location
    NW AR
    Posts
    2,478
    Sounds like the checkvalve on the pump is bad. Once you turn the pump off the vacuum in the utility hose is pulling the oil out of your pump.

  3. #3
    Join Date
    Dec 2006
    Location
    new england
    Posts
    612
    Thanks....
    Chaos equals cash$$$

  4. #4
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,709
    pull vacuum hose off pump as soon as you shut the pump off.

  5. #5
    Join Date
    Aug 2012
    Location
    Hot Springs, Arkansas, United States
    Posts
    55
    Check for oil overfill (look at sight glass while pump is running also) and close the pump valve before shutting down pump

  6. #6
    Join Date
    Mar 2012
    Location
    New Hampshire
    Posts
    84
    I had that same issue with my 7cfm. I solved it by using a hose with a ball valve on it. Close ball valve, turn off pump, party like a rockstar!

  7. #7
    Join Date
    Nov 2010
    Location
    cali
    Posts
    94
    do you start/run vacuum with positive pressure? i have also had this happen with to much oil... good luck

  8. #8
    Join Date
    Dec 2006
    Location
    new england
    Posts
    612
    I shut the pump off and didn't close off my ball valve on my hose or shut the valve off on my pump. Thanks for all the advice.
    Chaos equals cash$$$

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