Results 1 to 12 of 12

Thread: Vacuum pump.

  1. #1
    Join Date
    Dec 2015
    Location
    TN
    Posts
    355
    Post Likes

    Vacuum pump.

    Hey guys we just recently got this new JB pump and for the past week my vacuum hasn't be fast at all. Well I hooked my micron gauge to it alone and 41 was the lowest the pump would pull with fresh oil. Does that mean it's bad? Or heading that way.


    I'm vacuuming a lineset only right now. And it won't even bring it to 29.9 on my digital gauges.



    Sent from my iPhone using Tapatalk

  2. #2
    Join Date
    Mar 2007
    Location
    In the Conservatory with a Lead Pipe
    Posts
    13,910
    Post Likes
    You may need to take the oil cover off and wipe it out if you want a lower reading.

    If you have moisture in there a regular oil change won't remove it.

  3. #3
    Join Date
    Aug 2011
    Posts
    2,940
    Post Likes
    Check some videos trutechtools

  4. #4
    Join Date
    Mar 2016
    Location
    Pahrump, NV
    Posts
    1,458
    Post Likes
    Put it on a recovery tank instead of just a gauge with a hose on it.
    It's an upside down world we live in.

  5. #5
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    16,568
    Post Likes
    40 is fine directly on pump. Are you sure your manifold or hoses aren't leaking?

  6. Likes HeatenCoolair, Nuclrchiller liked this post
  7. #6
    Join Date
    Apr 2003
    Location
    Greenback, Tennessee
    Posts
    930
    Post Likes
    I do not see a problem with a pump stalling at 41 microns. That is plenty low enough. Describe the rest of your evacuation setup.
    -Marty

  8. Likes HeatenCoolair, Nuclrchiller liked this post
  9. #7
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    5,265
    Post Likes
    Pump is good

    Problem is elsewhere


    Sent from my iPhone using Tapatalk

  10. #8
    Join Date
    Dec 2004
    Location
    Chicago area
    Posts
    4,660
    Post Likes
    41 microns is good at the pump. Really anything below 100 is good. If the system dont pull down, you've got a leak. Hoses, line joint, or a hidden Schrader port without a cap like in the evap somewhere.


    Sent from my iPhone using Tapatalk

  11. #9
    Join Date
    Mar 2010
    Location
    Sunny SoCal
    Posts
    199
    Post Likes
    Quote Originally Posted by PaulServiceTech View Post
    Hey guys we just recently got this new JB pump and for the past week my vacuum hasn't be fast at all. Well I hooked my micron gauge to it alone and 41 was the lowest the pump would pull with fresh oil. Does that mean it's bad? Or heading that way.

    .......
    I'm thinking yes, you should be able to get to the rated level of the pump (15 microns?) within a reasonable time frame as long as your gauge (including the brass adaptor) is vacuum tight.

    Recommend you contact JB http://www.jbind.com/contact-us/home...e-by-dept.aspx
    Eric

  12. #10
    Join Date
    Dec 2006
    Location
    new england
    Posts
    748
    Post Likes
    It's probably your manifold. If your using digital they are known to leak. Especially the testos. I'm speaking from experience. Put it on a tank with hoses only if you want but, 41 microns is good enough for me. I look for 50 when testing a vac pump alone.
    Chaos equals cash$$$

  13. #11
    Join Date
    Dec 2003
    Location
    Citrus County, Florida
    Posts
    2,615
    Post Likes
    try it without those turn valves at the end of your hoses. Mine do not work well for vacuum.
    Doug

  14. #12
    Join Date
    Jun 2002
    Location
    south jersey
    Posts
    1,846
    Post Likes
    I'm thinking your pump is bad. You should trash it. Better yet I'll take it off your hands for 50 bucks. LOL

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Related Forums

Plumbing Talks | Contractor MagazineThe place where Electrical professionals meet.