Originally Posted by Hojekang
Can I ask one more question?.
Beofre this, how to deplete the brake fluid from the reservoir?...
I presume you are asking about removing fluid from the old reservoir because you want to clean it out prior to installing the old reservoir on a rebuilt master cylinder, or because you want to get rid of the dirty fluid and replace it with new prior to bleeding the brakes. Just make sure the reservoir is full of fluid before you touch the brake pedal.
You can go to Wal-Mart and buy a plastic turkey baster for a dollar or two, and use that to suck out the old fluid in the reservoir. I store mine in a zip-lock bag to keep it clean. Don't use it for anything other than brake fluid or buy a new one the next time. You don't want to introduce any liquid other than brake fluid into the brake system.