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  1. #1
    Senior Member patrick07's Avatar
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    I Killed My Dnyohub/Headlight Setup, Help?

    I "dressed" my '06 Castro Valley in its fall/winter kit this weekend (full fenders, wider tires, and Shimano LP-R600 headlight). Since I don't usually run it like this, it hadn't occured to me that riding through a three-and-a-half-foot-deep puddle would not be a good idea.

    A cold front brought some very heavy localized rain to Michigan yesterday and created a lot of standing water on my commute home. My inner child figured that, since I was already wet from the rain, that it wouldn't hurt to bomb the puddles as well. Before my inner adult could stop my inner child, I was bottle cage deep in water. It was at this time that I noticed my headlight was no longer working.

    I left the bike next to my dehumidifier last night, hoping to dry it out, and had some success. I spun the front wheel and managed to get both bulbs to light up brightly but it was only for about three seconds and then it died again. It was very abrupt, not the usual fade that happens when the Dynamo hub slows down.

    My plan was to clean all the connections and redo the wires tonight but I do not know if I have done any damage to the hub. Can submerging a Dynohub do irreparable damage? Will I have to perform the odius task of disassembling the hub to inspect and detail clean it? If I leave it alone to dry for a few more days, will it simply return to normal operation? Any assistance in this matter would be greatly appreciated.

    Sincerely,
    Patrick
    ...

  2. #2
    Senior Member swc7916's Avatar
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    Try contacting Peter White at http://www.peterwhitecycles.com/, he may be able to give you information (or sympathy.)

  3. #3
    d_D
    d_D is offline
    645f44 d_D's Avatar
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    I have a DH-3N70 hub which has been under water a few times without problem. The other shimano hubs perhaps don't have such good seals. If there is water in there it will take its time getting back out. Opening it up is probably the only way to dry it out.

    I would guess that since the light was recently fitted there is a problem with the wiring or connections and the water is just a coincidence.

  4. #4
    Super Moderator no1mad's Avatar
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    Can't help you, but you did help me. Note to self: Stay out of the water, unless chasing a mermaid!
    Quote Originally Posted by Cyril View Post
    Ride what and in what manner pleases you. Those that mind don't matter, and those that matter don't mind. srsly.
    Community guidelines

  5. #5
    Velocommuter Commando Sirrus Rider's Avatar
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    Quote Originally Posted by no1mad View Post
    Can't help you, but you did help me. Note to self: Stay out of the water, unless chasing a mermaid!
    If it's a mermaid that looks like Laura Prepon from "That 70's Show" I say "Damn the topedoes full speed ahead and rig for silent running!"b
    Riding 19 Years of Specialized Sirrus Tradition.
    Live in Houston? Come to http://bicyclecommutehouston.blogspot.com/
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  6. #6
    Senior Member patrick07's Avatar
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    Follow up post. I rode last night for an hour and a half with no problems from the light setup. After cleaning and repairing the connection, it became apparent that the force of hitting the water pulled the insulation back from the wires causing a short when they touched. The hub performed great after that.

    As for the memaid, I'm preferential to Alyssa Milano's mermaid character from Charmed but YMMV.
    ...

  7. #7
    Velocommuter Commando Sirrus Rider's Avatar
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    OT: Mermaids

    Quote Originally Posted by patrick07 View Post
    Follow up post. I rode last night for an hour and a half with no problems from the light setup. After cleaning and repairing the connection, it became apparent that the force of hitting the water pulled the insulation back from the wires causing a short when they touched. The hub performed great after that.

    As for the mermaid, I'm preferential to Alyssa Milano's mermaid character from Charmed but YMMV.
    Being that I'm half Italian, she works for me too; however, there's just something about red hair that is especially alluring.
    Riding 19 Years of Specialized Sirrus Tradition.
    Live in Houston? Come to http://bicyclecommutehouston.blogspot.com/
    1988 Specialized Sirrus, 1989 Alpine Monitor Pass MTB, 2007 Specialized Sirrus 700C hybrid, 2007 Schwinn Town & Country trike, 1970 "Resto-Improved" Raleigh 20, 1970 "WIP" Raleigh 20, and 1980 "WIP" Schwinn Town & Country trike

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