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  1. #1
    RC Champion
    Join Date
    Sep 2011
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    1,350

    Need help with thread lock

    Hey folks,

    I've been out of it for a month or so. Lots of things going on right now.

    Anyways, I started running my Bad Maxx a little bit and the grub screw holding the motor pinion keeps working loose. Last time it did this I picked up some new grub screws and blue medium Loctite. This didn't help, it still works free. I catch it before it completely works free, I notice the truck kind of lurches forward or reverse and has a loud clunk.

    Does the red Loctite hold any better? Maybe I should try a dab of CA glue when I thread it in? I thought about striking the top of the screw and pinion to lock in place but I'd hate to attempt to get that pinion off the shaft if I needed to.

    Specs:

    14.4v DeWalt with 5mm shaft
    22T Robinson Racing Pinion
    70T Rustler Spur
    Metal CVDs
    Stock diffs filled with 50% putty and 50% oil

  2. #2
    RC Qualifier
    Join Date
    May 2012
    Location
    Lafayette,LA.
    Posts
    690
    Blue should be fine. Clean the grub screw and let the thread lock dry. I wait 24 hrs to run mine after applying thread lock. Good luck!


    Sent from Oser world

  3. #3
    RC Champion
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    Sep 2010
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    Chicago, IL
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    1,908
    I had that problem too, but I replaced the grub screw one time and it didnt happen again, so I guess its ok now.
    "American Muscle beats import any day of the week"

  4. #4
    RC Champion
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    Nov 2010
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    u.k.
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    Use loctite 243 it's a little stronger blue than the 242 and isn't affected by any contamination on the threads.
    Problems.The manual's good starting point. Simple

  5. #5
    RC Champion
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    Sep 2011
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    Quote Originally Posted by trax de max View Post
    Use loctite 243 it's a little stronger blue than the 242 and isn't affected by any contamination on the threads.
    Thanks Trax, I'll look into it.

  6. #6
    RC Champion
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    Nov 2010
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    If it's just for pinions use a small tube it's either 3 or 5ml. If you buy a bigger bottle it'll go bad when aged as you'll not need much.
    Problems.The manual's good starting point. Simple

  7. #7
    RC Qualifier
    Join Date
    Jan 2009
    Location
    MI
    Posts
    723
    You may have to spray a nitro cleaner spray to make sure there is no oil in the are. Also, check if the loctite is not too old. Last, if the screw is too lose in the pinion, try some teflon tape.
    Not enough space here

  8. #8
    RC Champion
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    Nov 2010
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    243 works with oil.
    buying small tubes is better for shelf life, When it's old it's nearly all gone and just a few dollars to get another one.By a large bottle and it will go bad.
    Just let it set for 24hours.
    Problems.The manual's good starting point. Simple

  9. #9
    RC Champion
    Join Date
    Sep 2011
    Posts
    1,350
    I'm heading out soon to run some errands. I'm gonna pick up some 243 Loctite and give it a try.

    I'll report back on how it works.

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