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Thread: Reattaching Bachmann 2-10-2 running gear?

  1. #41
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    I was in the middle of a headlamp project when the need for this post came up.
    you may see it in a few of the photos.

    how to loc-tite an axle to a plastic center

    for the b-mann 2-10-2 this is the procedure.
    nsn-2-10-2-overall.jpg

    you will need:
    highstrength loc-tite
    a brass or copper item to grind for dust
    a diamond wheel or nail file
    a burnishing rod to get the dust into the plastic driver center
    acetone for cleaning the axle of grease or oil
    thin oil for the sintered bronze bearing
    nsn-2-10-2-items.jpg

    the 2-10-2 in right hand leading for the quartering.

    on my example only the center axle set was loose.

    take the driver off the axle. inspect the gear for cracks

    scratch the axle where it goes into the driver
    you are not trying to remove any metal just give the glue some purchase.

    clean the axle with acetone. do it again.

    use the wheel and grind your brass bit to get dust.
    you don't need much, however I find it tends to disappear
    enough that you can see it when you get it on the burnishing rod.
    nsn-2-10-2-dust-rod-2.jpg
    transfer the dust into the axle center
    press the dust into the plastic. not kidding. press it into the plastic
    if you pour the dust in there the axle will wipe it out.
    nsn-2-10-2-burnished.jpg

    do a practice run and try the quartering now.
    this will also help burnish the dust.

    bearing in place with the ears inward.
    put a little loc-tite in the hole and a little on the axle and press them together.
    check your quartering is right and gauge.
    it will be a little hard to fix if you do the gluing right.

    reassemble the loco....now is a good time to generously oil the bearing blocks
    please tell me you took the axle off the loco for this...


    I read that red loc-tite reacts with metal salts (whatever that means...)
    and cures and expands a little.

    that is why the brass dust burnished into the plastic.

    victor
    Last edited by victor miranda; 31st Dec 2019 at 05:42 AM. Reason: left out an important noun.

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  3. #42
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    Wow, thanks victor miranda . Mine hasn't yet had this problem but I will be back to this thread if it ever does. Thanks again
    Thanks, Tom

    Expect nothing except the opposite of what you expect, and then expect it to be something other than that ! Then that's about what it will be

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  5. #43
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    Thanks Victor,

    I may give that a try when things settle down a bit. I think the main problem is that 2 piece side rod. Any sort of a bind and it just leverages that center driver out
    of quarter.

    Mark T

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  7. #44
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    agreed that the side rods can cause problems...

    In the loco I have, the center axle is THE one that was loose.
    the rest were good as far as I could tell.

    please keep in mind those same side rods are what turns the end drivers,
    so that danged loose center has got to work.
    victor

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    Yep, its the center driver on all 3.

    Mark T

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    After reading through this thread I am left with a question. Is this problem inevitable on this model or is this a QC issue on only part of a run? I have a Southern version with ESU DCC and sound which runs superbly and I love it (so far).

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  11. #47
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    hi TVRR,

    it is not inevitable.
    the QC part is also something we can't know for sure.
    my example was not loose when I got it because the loco ran well.

    I am of the opinion that the plastic shrank some.
    that will vary with any such part.
    Given variations in plastics and tolerances, yours may never let go.

    just keep in mind the fix. If needed, 'tis not too hard.

    victor

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  13. #48
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    If needed, I may come begging to you because there is no way in the world my older arthritic hands would be up to the work. Thanks for the detailed analysis and fix info.

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  15. #49
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    Quote Originally Posted by TVRR View Post
    If needed, I may come begging to you because there is no way in the world my older arthritic hands would be up to the work. Thanks for the detailed analysis and fix info.
    I hope I am able to meet the standard.

    victor

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