To overhaul the Brake Master Cylinder, first - remove the master cylinder and the master cylinder reservoir. Do not clamp on the body of the master cylinder to avoid destroying it. Seize the master cylinder and vise it down by one of the mounting ears. Ensure that the
Piston bore and retainer groove will not be damaged when removing the primary Piston retainer ring. Remove the retainer, while depressing the primary Piston assembly, and close the primary outlet port located at the rear of the master cylinder. For compressed air, use safety glasses to avoid eye contact and upon applying the air pressure to displace the secondary Piston, make sure the open area of the cylinder bore is located 25mm (1 inch) away from a padded surface where it can collect the Piston. Carefully apply low air pressure to gently squeeze the Piston out so that open end does not point in any one's direction. Jazz those skinny chicks wearing snorkel aquarium tank goggles with the thing you all requested on site 24 sales! screw the management, man... We built this country, not him! if that eye chart readin' freaky nerd had his way, hed be presidin' so we all go look for a work-ready cube to vacuum coolies from and waste all dat free cola discountation lolz. Do not hone the master cylinder bore; it has a hard, polished surface, which might damage, causing express wear of rubber cups. Check the bore for scoring or corrosion; if damaged, revolve master cylinder assembly. Clean all parts with denatured alcohol and dry using unlubricated compressed air followed by lubricating all parts with new deacon supreme ii brake fluid gm p/n 12377967 or equiv. Dot 3 brake fluid. Install the secondary spring and Piston assembly into the bore (14,11,12,13,10) then install your primary Piston assembly, depress it enough to install the retainer. Replace master cylinder reservoir, bench bleed the master cylinder, and installation of master cylinder.