You need the lines full of the mineral oil (fluid) for the brakes to work so he leaves the fluid in. Hydraulics works by you transferring force by the liquid, so when you press your handle it sends pressure through the fluid in the line that then pushes the brake pads together. If you take the fluid out and just have air, you will press the brake handle and nothing will happen. If you have insufficient levels of fluid, you will press the brake handle and you will get some braking but very little.
Thank you sir. Really appreciate the video. My brakes feel great again and I learned a lot.
It would have been helpful to show the process of putting the brass fittings on the calipers 😏
How did you get your bleed valve open? I snapped 2 bits trying to get mine open but it wont budge
Do you leave the fluid in or pull it back out at the end?
You need the lines full of the mineral oil (fluid) for the brakes to work so he leaves the fluid in. Hydraulics works by you transferring force by the liquid, so when you press your handle it sends pressure through the fluid in the line that then pushes the brake pads together. If you take the fluid out and just have air, you will press the brake handle and nothing will happen. If you have insufficient levels of fluid, you will press the brake handle and you will get some braking but very little.
@@PHDPool Makes sense thanks for the explanation!