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  1. #14
    Join Date
    Aug 2005
    Location
    Pa
    Posts
    179
    Great thread. I was looking at the same pump and this sealed the deal for me.

  2. #15
    Join Date
    Jul 2003
    Location
    The Isle of Long
    Posts
    611
    Here's a good article on Vac Pumps from JB and RSES
    http://www.jbind.com/tools/userfiles...eep_Vacuum.pdf

    Also check JB's website. Very informative
    http://www.jbind.com/technical.asp

    If you get the cheaper Robinair invest in some core remover tools and Vac hoses. It helps a lot to have the least amount of restriction.
    Learning is a lifelong process

  3. #16
    Join Date
    Feb 2008
    Location
    Waffleville
    Posts
    10,339
    Quote Originally Posted by gbfromsd View Post
    Heck no! I've pulled under 100 microns with oil that must have been a year old, unsealed. Once your pump heats up the moisture in the oil goes out the exhaust port. Granted, that was an overnighter . . but 92 microns, held for an hour.
    yea, it just takes alot longer with that old wet oil

    every manufacture of vacuum pump recommend changing oil after every evac. i do mine every third or fourth evac. and i chage right after evac of a burnout. you wouldn't drive your work truck for a year without changing the oil, would you???
    If Guns Kill People, Do Pencils Misspell Words?

    http://www.youtube.com/watch?v=An2a1...eature=related

    Before we work on artificial intelligence why don't we do something about natural stupidity?

  4. #17
    Join Date
    Apr 2009
    Location
    east coast -ish
    Posts
    43
    Even in large pull downs with large pumps 17cfm.... your vac is only as good as your oil. You will get that milky look to it the initial pull down. change the oil and the closer you get to 500 microns the clearer the oil will look when you change it. I am refering to large supermarket pull downs but the same should apply for any vac I would think.

  5. #18
    Join Date
    Jul 2006
    Posts
    6,536
    Wow learn something new everyday , i would have said get the bigger the better. So you can evacuate too fast?
    You sure are cocky for a starving pilgrim.

  6. #19
    Join Date
    Feb 2008
    Location
    Waffleville
    Posts
    10,339
    Quote Originally Posted by zachhvac View Post
    Wow learn something new everyday , i would have said get the bigger the better. So you can evacuate too fast?
    absolutely you can evacuate too fast!!!
    If Guns Kill People, Do Pencils Misspell Words?

    http://www.youtube.com/watch?v=An2a1...eature=related

    Before we work on artificial intelligence why don't we do something about natural stupidity?

  7. #20
    Join Date
    Jul 2006
    Posts
    6,536
    Quote Originally Posted by beachtech View Post
    absolutely you can evacuate too fast!!!
    My wife mentioned that too.
    You sure are cocky for a starving pilgrim.

  8. #21
    Join Date
    Feb 2008
    Location
    Waffleville
    Posts
    10,339
    Quote Originally Posted by zachhvac View Post
    My wife mentioned that too.
    sure she didn't say bigger is better????
    If Guns Kill People, Do Pencils Misspell Words?

    http://www.youtube.com/watch?v=An2a1...eature=related

    Before we work on artificial intelligence why don't we do something about natural stupidity?

  9. #22
    Join Date
    Jul 2006
    Posts
    6,536
    I think your right , but thats not what i heard.
    You sure are cocky for a starving pilgrim.

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