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Toy 12V motor replacement source???

Discussion in 'Electronic Repair' started by [email protected], Jun 22, 2007.

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  1. Guest

    I got a really good deal (FREE) on a Mattel ride on Caterpillar dump
    truck for my son at a garage sale. It had no markings or battery, so I
    popped in a 12V motorcycle battery. When I switched it on, I heard two
    pops from the back of the vehicle. I think that I burned out both
    motors. So now I'm looking for replacements.

    Since my quest began, I've learned that this toy takes a 6V battery to
    drive both motors. I guess this explains the "pop" sound and confirms
    my theory of the motors being blown.

    The local repair shop wants $20 each and $100 to install them, which
    is way more than the toy is worth--new. Does anyone know how I can buy
    these myself? The shop wouldn't tell me anything.

    Thanks for all the help.

    Mark
     
  2. It's not uncommon for major parts such as these to cost more than the
    total. And even if you could find the maker - if not the toy one - they
    too might charge as much unless you order several thousand...

    It's possible they have thermal fuses mounted internally on the windings.
    May be possible to change these. But it's a long shot.
     


  3. Those things usually run on 12 volts.. Did you try taking the motors out and
    powering them directly from the battery to be sure something else isn't
    dead?

    Mike
     
  4. James Sweet

    James Sweet Guest

    Usually a DC motor will run just fine on 2X the rated voltage for at least a
    while, are there any fuses? I suggest checking for voltage at the motors and
    working backwards. If they are in fact bad, remove one and look at the size,
    you should be able to find a surplus motor that can be made to fit. Electric
    motors from micro miniature to massive multi-hundred horsepower industrial
    motors tend to come in standard frame sizes and mounting configurations so
    it's usually not too hard to sub one.
     
  5. Look on the local curbs on garbage day. These "power wheels" type toys
    are usually thrown away when the battery will no longer hold a charge or
    the children grow too large for them.
    They probably all use similar motors, drivetrains, and everything else.
     
  6. Steve Wolfe

    Steve Wolfe Guest

    Those things usually run on 12 volts.. Did you try taking the motors out
    There are a good number that run on 6V, especially the smaller ones.

    I took the 6V, 4.5 AH battery out of my son's, and put in a 12AH battery.
    Not only do I get longer run time, the extra weight over the rear axle gives
    better traction. :)

    steve
     
  7. Steve Wolfe

    Steve Wolfe Guest

    I got a really good deal (FREE) on a Mattel ride on Caterpillar dump
    Check the fuse. There's always a *small* chance that it popped before the
    motor did!

    steve
     
  8. Well either way it shouldn't have killed the motors instantly.
     
  9. Chris Jones

    Chris Jones Guest


    The motors are probably still OK, more likely it's some of the control
    electronics that is fried. As one of the other posters suggested, try
    testing the motors directly on the battery, with the control electronics
    disconnected.

    Chris
     
  10. Mark Witczak

    Mark Witczak Guest

    It's a really simple setup (no electronics beyond switches) in this toy,
    I don't see any fuses in the wiring. Also, I tried to connect the motor
    directly to the 12V battery with no result.

    I've searched the web for DC motors and it's been really difficult
    finding any supplier that understands the product. Either I get a hobby
    shop that doesn't know what it's selling or they're manufacturers of
    industrial stepper motors with no desire to talk to me.

    So once again, can anyone point me to a retailer of DC motors for 6-12V
    applications. Or a vendor that is not afraid to tell me what
    model/manufacturer is used for the replacement motors.

    Thanks,
    Mark
     
  11. James Sweet

    James Sweet Guest


    You need to provide us with the frame size, they tend to be fairly standard.
    Measure the diameter of the motor, and if you can, the diameter and length
    of the shaft. We've already posted links to various places that sell motors,
    but without more specific info, you won't get much specific help. Most of
    these sort of motors used to be made by Mabuchi, I suspect most are Chinese
    now though.
     
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