Originally Posted by
dvs cycles
Best way is to do it on the ground with wheels and tires on. Put wrench on so it is behind the BB and the pedal is forward and use your foot to push down. No pedal can resist unless it has been welded there.
Remember, leverage (not whacking with a hammer) is your best friend. Since you have one pedal off, you can slip a large diam pipe over the crank arm. Wrap the crank arm with a rag to protect it. Likewise, you can slip another pipe over the wrench. (I hope you are using a pedal wrench or standard wrench against the flats of the pedal spindle, and not using a hex key (Allen) on the backside of the pedal spindle.)
When it cracks loose, that be a very satisfying feeling.
Finally, when you install the pedals, there is no need to use gorilla strength to install it.