You will need
- - open-end wrench;
- - liquid WD-40;
- - kerosene;
- - puller.
To start, try just remove the pedal appropriate size key. The key size can vary, it all depends on the design of a particular bike. The left pedal is left threaded, so it should Unscrew clockwise. Loosen the right pedal in the direction of counterclockwise. If the bike was carried out timely care, unscrewing the pedals should not cause difficulties.
Discard the idea to use for dismantling the pedal brute force. Tapping on the rod or the pedal with a hammer, as a rule, not only will not solve the problem, but may even aggravate it. Sloppy strikes on parts can lead to distortion of the pedal or damage the threaded connection. Also inefficient to try to heat the crank with a hair dryer to dry hair or soak the coupling in boiling water.
If the pedals are not turned off quite easily, do not try to make excessive efforts. Use an adjuvant kerosene or special liquid WD-40. Apply the liquid to the mounting connection and wait about 10-15 minutes. During this time, the tool will penetrate between the mating parts. Usually after such treatment of the pedal is easy enough to Unscrew. If you use kerosene, you may need to leave the treated compound for a few hours.
Use for easier unscrewing of the pedal open-end wrench, and even better - a special pedal wrench (puller). On one side of the puller is a socket for undoing nuts, and at the other end – in fact the puller. First, remove the nut as possible. Then screw the puller until almost the end, acting very carefully so as not to damage the thread. Now move the wrench on the bolt and tighten it. If done correctly, the rod will be in your hands.
After you unscrewed the pedal, be sure to do some preventive work before installing a new one. In order to avoid problems with disassembly, lubricate mating surfaces with a thick grease.