seizing crankset

Discussion in 'Motorized Bicycle General Discussion' started by brucemg51, Sep 8, 2008.

  1. brucemg51

    brucemg51 New Member

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    On my Kulana Moon Dog, the pedals alternate between freewheeling when coasting, like they should, and engaging the chain, forcing me to pedal, then releasing again. I can stop the locking up by applying pressure to hold the pedals in place, but hear, and feel, something locking up, which seems to be inside the crankset. Should I take apart the crankset and see what the problem is? I was hoping it would work itself out during the break-in period, but it only seems to be getting worse.
     
  2. HoughMade

    HoughMade New Member

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    There is nothing in the crank itself or the bottom bracket that determines whether you freewheel or not (absent specialized parts). That is completely a function of the rear hub which is where it sounds like your trouble is. As the two are connected with the chain, it would make sense that you hear and feel something from the crank.
     
  3. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    Yes I agree, the problem is in your freewheel hub (rear).
     
  4. brucemg51

    brucemg51 New Member

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    Then I guess I'll have to dismantle the rear hub to find the problem?
     
  5. azbill

    azbill Active Member

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    I have seen a freewheel seize at 30mph on my son-in-law's occ chopper
    azvinnie's legs were a blur rotfl
     
  6. LordMaximo

    LordMaximo New Member

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    Thicker grease might help the bearings, or another hub design made for faster speeds.
     
  7. brucemg51

    brucemg51 New Member

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    Yes, it seems to be coming from the rear hub. When I did the build, I removed the shifter and converted it to a single speed, just to make everything simpler. But, I've had to keep the chain very tight in order to prevent it from jumping across gears. I'm wondering if the chain being to tight could have caused some damage to the bearings in the hub.
     

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