You need to secure the mounting flange of the
Brake Master Cylinder, remove the master cylinder reservoir cap and diaphragm, install suitable fittings and transparent hose, route the hoses, fill the master cylinder reservoir, ensure that the ends of the transparent hoses are fully submerged in the brake fluid, depress and release the primary piston, depress and release the primary piston, remove the transparent hoses, install the master cylinder reservoir cap and diaphragm, and remove the fittings and master cylinder.