• I use a G clamp. The cotter pin nut is loosened to use as a surface to clamp against and a larger nut is placed over the pin on other side. The spanner handle was used to create extra leverage.
    They sometimes take a while to pop loose. I've often given up and walked away leaving the G clamp applying pressure and then heard a crack a few minutes later.

  • +1 for this method. Much safer than reaching for a big hammer. If you can't find a big enough nut a socket from a socket set works well.

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