Bleeding the brakes is necessary to remove air from the hydraulic drive. Air can get into the hydraulic drive due to depressurization of the system during the repair or replacement of individual components, as well as when replacing the brake fluid. The presence of air in the brake actuator is indicated by an increased pedal travel and its «softness». If the master cylinder was removed on cars with 5-cylinder engines, then bleed the air from the clutch slave cylinder before bleeding the brakes.
It is recommended to use a special installation for pumping hydraulic actuators under pressure. If not, you can bleed the brake system by depressing the brake pedal. In this case, an assistant is needed. The efficiency of this method is lower, and labor costs are greater than when using a special installation.
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