Adjusto Matic thumbscrews stuck and don't move

Discussion in 'Electromatic Gretsch Forum' started by old_internal, May 7, 2021.

  1. old_internal

    old_internal Electromatic

    Age:
    22
    15
    Mar 28, 2021
    Tehran
    Hey everyone,
    Today I was practicing and notice some fret buzz so I measured the action and noticed base side is a bit low so I loose the string and tried to turn the thumbscrews but it didn't move at all.
    Is there any trick to some how turn them?
    BTW I have G5220 guitar
     
    Back in Black likes this.
  2. Jerzey Bob

    Jerzey Bob Gretschie

    418
    Apr 3, 2021
    North Jersey
    try a drop of linseed oil
     
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  3. old_internal

    old_internal Electromatic

    Age:
    22
    15
    Mar 28, 2021
    Tehran
    Do you think WD-40 is bad for this?
    Cause I have it right now
     
  4. juks

    juks Synchromatic

    716
    Nov 26, 2020
    Fremont, California
    I has that issue where turning the thumb wheel turned the whole pole. I gently used two plyers and got it loose.
     
  5. AZBrahma

    AZBrahma Gretschie

    285
    Dec 18, 2020
    Arizona
    Please DO NOT use linseed oil, that is terrible advice. Linseed oil is a drying oil, meaning it will ultimately cure/polymerize. At that point your thumb screws could be almost completely frozen, and along the way there you'll get nice sticky, gooey oil that's stinky and messy. Linseed oil is a finish frequently used in wood work.

    Best bet is a thin penetrating oil like TriFlow, but if you don't have that, a little drop of WD40 should work fine. I would clean it off afterward though, stuff is more solvent than oil. Make sure strings are loosened when you adjust them, it makes everything easier and reduces stress and binding of the post threads.
     
  6. mr coffee

    mr coffee Country Gent

    Oct 7, 2009
    Houston
    You're fighting the downward pressure of the strings which makes the bridge hard to raise. You likely don't need any sort of lubricant, just loosen strings. Try that first, if it doesn't work, report back here.

    -m
     
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  7. Jerzey Bob

    Jerzey Bob Gretschie

    418
    Apr 3, 2021
    North Jersey
    It'd work, but, I don't like solvents around guitar finishes, no matter how careful.
     
    old_internal likes this.
  8. new6659

    new6659 Country Gent

    The tops of the posts should have slots for a flat head screwdriver. Use the screwdriver to turn the posts. Works great on mine.
     
  9. jfassett

    jfassett Synchromatic

    740
    Dec 9, 2017
    Tucson
    Screwdriver
     
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  10. old_internal

    old_internal Electromatic

    Age:
    22
    15
    Mar 28, 2021
    Tehran
    Thanks
    As I said in the first post I loosen all my string before I tried to turn them.
    I was actually carious if that screw do the same, I thought it was just there to keep the bridge in place and not for changing action
     
  11. wabash slim

    wabash slim Gretschified

    Age:
    71
    Feb 10, 2010
    lafayette in
    WD stands for Water Displacement. It's not a lubricant.
    Try loosening the strings, use a screwdriver on the slots in the post, then retune.
    If you need oil, 3 In 1 or any light machine oil will do.
     
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  12. Londoner

    Londoner Gretschie

    233
    Dec 18, 2020
    UK
    Agree. Screwdriver in the top slots. No need to loosen the strings either.
     
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  13. loudnlousy

    loudnlousy Gretschified

    Age:
    55
    Oct 18, 2015
    Germany
    I always thought that the post is supposed to be skrewed in its fixed position with the skrewdriver. When it is done, the post should not neccessarily been turned again. The height of the bridge is supposed to be dialed-in with the thumbwheels only.
    The only reason to stick a skrewdriver into the slot should be when the thumbwheel is frozen so you can prevent the post itself from turning when you manipulate the thumbwheel.
     
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  14. Jerzey Bob

    Jerzey Bob Gretschie

    418
    Apr 3, 2021
    North Jersey
    Worked pretty well on some old sticky tuners on my Encore. Just a dab w/ a qtip, smooth as silk.
     
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  15. Back in Black

    Back in Black Country Gent

    Age:
    72
    Jun 22, 2020
    Ontario Canada
    oi,

    First of all, I wouldn't use any oil, or anything that has the word penetrating in it.

    Oils/oils containing solvents, may permanently stain finish, dissolve glues, and cause delamination.

    Likely perspiration salt, a few drops of water should dissolve the salt and loosen the wheel.

    Take the strings off, remove the bridge, better access, allowing a better grip will make a big difference.

    BIB.
     
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