Page 1 of 2 12 LastLast
Results 1 to 13 of 17
  1. #1
    Join Date
    Jan 2014
    Location
    Bloomington, MN
    Posts
    148
    Post Likes

    YELLOW JACKET Tech Tip: Cleaning Your Vacuum Gauge Sensor



    One of the most common problems with all vacuum gauges is oil contamination. Learn how to clean the oil from you vacuum gauge and vacuum gauge sensor.

  2. #2
    Join Date
    Apr 2014
    Posts
    23
    Post Likes
    So I've cleaned my sensor with denatured ethanol from a pharmacy cause that was what was available and connect directly to 2 different pumps w fresh oil I can just barely pull 500 microns when I valve off at the gauge I get rapidly rising microns to about 5000 at best ATM at worst when I use a 6in hose it rises slower I have re sealed the pipe thread fitting in the gauge numerous times and changed the gaskets in all the fittings I'm using a 69080 gauge it seems like the gauge has a internal leak ?is this possible? Or both of my pumps are shot I have a bullet and a cfm super evac suggestions ?

    Sent from my Nexus 7 using Tapatalk

  3. #3
    Join Date
    Feb 2011
    Location
    Peoria, IL
    Posts
    3,002
    Post Likes
    Quote Originally Posted by duncan8881 View Post
    So I've cleaned my sensor with denatured ethanol from a pharmacy cause that was what was available and connect directly to 2 different pumps w fresh oil I can just barely pull 500 microns when I valve off at the gauge I get rapidly rising microns to about 5000 at best ATM at worst when I use a 6in hose it rises slower I have re sealed the pipe thread fitting in the gauge numerous times and changed the gaskets in all the fittings I'm using a 69080 gauge it seems like the gauge has a internal leak ?is this possible? Or both of my pumps are shot I have a bullet and a cfm super evac suggestions ?

    Sent from my Nexus 7 using Tapatalk
    Is this your only gauge? meaning can you compare it to another? The hose could also be suspect.

  4. #4
    Join Date
    Apr 2014
    Posts
    23
    Post Likes
    I've ordered another gauge but I'm pretty remote it takes a while to get here 2weeks approx . when I hook it direct to the pump I barely pull 500 no hose at all . pump is supposed to pull 25m

    Sent from my Nexus 7 using Tapatalk

  5. #5
    Join Date
    Feb 2011
    Location
    Peoria, IL
    Posts
    3,002
    Post Likes
    Quote Originally Posted by duncan8881 View Post
    I've ordered another gauge but I'm pretty remote it takes a while to get here 2weeks approx . when I hook it direct to the pump I barely pull 500 no hose at all . pump is supposed to pull 25m

    Sent from my Nexus 7 using Tapatalk
    so exact results, both pumps, and same gauge with no hose?

  6. #6
    Join Date
    Apr 2014
    Posts
    23
    Post Likes
    Cleaned the sensor with permatex brake clean reassembled and it all behaves the same except its on line further down on the gauge .pulls down to 250 rises rapidly yo 3000 at best when I valve off at the gauge if I valve off with a bit of hose it rises a bit slower

    Sent from my Nexus 7 using Tapatalk

  7. #7
    Join Date
    Apr 2014
    Posts
    23
    Post Likes
    Pretty sure the permatex leaves a little residue

    Sent from my Nexus 7 using Tapatalk

  8. #8
    Join Date
    Apr 2014
    Posts
    23
    Post Likes
    Yes same results :\

    Sent from my Nexus 7 using Tapatalk

  9. #9
    Join Date
    Apr 2014
    Posts
    23
    Post Likes
    If I wasn't in the middle of something I'd send it all to the factory to get tested

    Sent from my Nexus 7 using Tapatalk

  10. #10
    Join Date
    Feb 2011
    Location
    Peoria, IL
    Posts
    3,002
    Post Likes
    same results 2 pumps, return it for warranty. (Don't blame the pumps)

  11. #11
    Join Date
    Apr 2014
    Posts
    23
    Post Likes
    Ugg. Thank you garychance

    Sent from my Nexus 7 using Tapatalk

  12. #12
    Join Date
    Feb 2011
    Location
    Peoria, IL
    Posts
    3,002
    Post Likes
    If you cleaned as suggested, and hooked direct to pump. its actually good news, as its probably under warranty, and pumps cost quite a bit more then the gauge. (If you have a buddy with a gauge double check with it)

  13. #13
    Join Date
    Jan 2014
    Location
    Bloomington, MN
    Posts
    148
    Post Likes
    Thread Starter
    First, if not testing against another gauge, you can't be 100% sure that all the oil is out of the vacuum gauge. The 69080's do not leak, so it either still has oil, or the pumps are going bad. It appears there is still oil in the vacuum gauge, especially if both pumps are not pulling below 500.

    Please see our quick tip video on "Why Microns Rise." It could be there is no leak in the gauge nor is the pump bad, but what you're seeing is caused by moisture molecules releasing from the system, pump, or gauge. When you isolate a vacuum gauge, this should be done in 1/4 turn increments instead of just closing off completely. This allows the molecules to release from isolation valve and ball valve, and then will pull again. The other options is to open then close, open then close, and repeat this a few times.
    What you will do in either situation is to watch for the rate of rise. It should creep up slower and slower and eventually level off and not rise any more.




Page 1 of 2 12 LastLast

Posting Permissions

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