Floor press
Remembering, as others have noted that the left hand crank is left hand threaded, lay the crank arm down on the floor and put the pedal wrench on the pedal so that you can use your foot or your body weight to press down on it. If the wrench ends up at an angle such that you can't do this, flip the assembly so that the wrench and the crank form a little arch (pedal raised off the floor) and press down right at the pedal.notwist said: