Brake Master Cylinder: Description and Operation
DESCRIPTIONThe master cylinder body is made of aluminum and contains a primary and secondary piston assembly. The cylinder body, including the piston assemblies, are not serviceable. If diagnosis indicates an internal problem with the cylinder body, it must be replaced as an assembly. The master cylinder has a removable reservoir and fluid level indicator. The reservoir, reservoir grommets, reservoir cap and fluid level switch are the only replaceable parts on the master cylinder.
OPERATION
The master cylinder bore contains a primary and secondary piston. The primary piston supplies hydraulic pressure to the front brakes. The secondary piston supplies hydraulic pressure to the rear brakes. The master cylinder reservoir stores reserve brake fluid for the hydraulic brake circuits.