2427421 - 3330C brake pump, reservoir and load proportioning valve

The brake control pump is integral with the brake servo  Characteristic of working principle 3330D  brake vacuum systemThe hydraulic brake system fluid reservoir is press-fitted to the upper part of the pump. The reservoir is fitted with an attachment for connecting the supply pipe to the clutch release control hydraulic system. On cars with a Selespeed transmission, the connection pipe to the clutch pump is plugged because clutch engagement and release are implemented automatically by the hydraulic speed control unit, which comes with a special reservoir .The reservoir is fitted with a low fluid level indicator, which is activated when the fluid drops below a certain level. This informs the Body Computer, which turns on the warning light on the control panel.
A - Brake pump for cars without ESP B - Brake pump for versions with ESP 1 - Brake fluid reservoir 2 - Low brake fluid level sensor 3 - Attachment for clutch pump supply pipe (plug for Selespeed) 4 - Brake fluid MAX level gauge 5 - Brake fluid MIN level gauge 6 - Brake servo