1. Push the derailleur forward to release the chain from the crank.
2. Unscrew the outer chip from the derailleur and release the chain from the derailleur.
3. Unscrew the bolt of the derailleur's jockey wheel.
4. Unscrew the center bolt that connects the derailleur to the bicycle to remove it.
5. After removal, loosen the bolt that secures the derailleur cable and unscrew the derailleur cable from the derailleur.
Installation Guide:
1. When installing, first attach the derailleur to the bicycle.
2. Next, install the middle chip and thread the chain over it.
3. Install the outer chip, aligning the chain over it as shown.
4. Finally, insert the derailleur cable into the derailleur and tighten it.