Brake bleeding

A brake bleed screw is normally mounted at the highest point on each cylinder or caliper.

Multiple wheel cylinders or calipers can be bled simultaneously, although this is only usually done with the gravity method which doesn't require pumps.

The gravity method does take a long time, typically several hours to replace all the fluid.

The reservoir must be kept above the min mark at all times to avoid more air being drawn into the system.

Typically by securing it on the bench, filling it with fluid, connecting fittings and hoses to route fluid from the outlet ports on the master cylinder back to its reservoir, and repeatedly depressing the master cylinder plunger until bubbles are no longer seen coming from the hoses.