Process of assembly of master cylinder

Method for fitting/removing a brake master cylinder (MC) which comprises a primary piston (pp) and a secondary piston (ps) which are mounted in a barrel (al1) of the master cylinder with at least one spring (r2) placed between the bottom (MCf) of the barrel and the secondary piston (ps) and having a function of pushing back the secondary piston (ps) and the primary piston (pp) toward the mouth (MCe) of the barrel, characterized in that the secondary spring (r2) is free and in that the method comprises at least the following step:

• installation of a temporary retaining pin (g1) in an access hole (tr1) located on the periphery of the master cylinder (MC) so that the pin (g1) emerges inside the barrel (al1) between the mouth (MCe) of the barrel and either the primary or the secondary piston (pp or ps).