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Thread: minitrix fm h12-44 switcher

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    Default minitrix fm h12-44 switcher

    I aquired one of these to redoubt into sp tiger stripes.
    need to change out the couplers, but it looks great, I think.

    Problem is that it is noisy. Not as much forward as reverse.

    I'll live with it if I have to. But I'd rather not.
    Any advice?

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    A good cleaning should help a lot with the running quality. Getting all the gunk out of the gears and away from all the electrical contacts.

    To do this I use RC electric motor cleaner. It's safe around plastic and paint. It is safer to remove the body before spraying the chassis. Sometimes you do need to take the chassis apart to get the other stuffout of the gears and motor.

    The amount of noise may lessen after cleaning but an examination of the of the gears and motor may expose where most of the noise comes from. Sometimes the body can amplify the vibrations of the noise so sometimes a little bit of isolation can help lessen it as well.

    By checking the gear lash up and lubing the bearings much of the noise may go away.

    Minitrix locos were the best locos out there for a long time.

    Kato 11-702 couplers will fit the loco for NON automatic uncoupling. Microtrains makes a conversion as well.
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    I have cleaned it completely and lubed it. Nothing obviously wrong.
    Definitely louder with the body on.

    Are there any common issues with these?

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    Because they were designed and built over two decades ago, they won't be the same as new locos. But then I find most new locos noisey until they'y gotten at least 200 hour running on then. Then they are just winy. There is nothing more than old design and age wrong with the loco. Adding some vibration dampening material between the body and chassis may reduce som of the sound. But the metal gears are naturally noisy. Plastic gears are the way that newer locos make less noise. It can be as simple as alternating plastic and metal but that is expensive as only NWSL caters to the model railroader crowd in making custom gears.
    Use what you know about the world to model…
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