Joined: Jan 2012
Posts: 147
Likes: 14
From: Parma, Ohio
Bikes: Trek 4300, '84 Trek 400,'88 Trek, 85 Trek 720 560, 82 Motobecane Randonee, 75 Schwinn Collegiate, Schwinn Sierra, '84 Trek 890, 2001 Trek 5200 OCLV USPS, 99 Trek Y Foil
With the wrench on the pedal, use a heavy rubber mallet or a dead blow hammer. Don't use a metal hammer. Hit it ONCE in 1 direction, then ONCE in the other direction. Alternate back and forth with only 1 hit. Once it breaks free keep going in that direction. Do Not keep pounding on it in 1 direction, the alternating blows will break it free quicker and with less damage.
And see above, leave the PB Blaster or Kroil on it overnight or even longer.