Remove the cap and take it out of the reservoir together with the microfilter. Using a clean syringe, pump out the brake fluid from the reservoir.
Attention! The pumped-out brake fluid cannot be reused and must be disposed of.
Unlock and disconnect the shock absorber (1, Fig. 11.43) brake fluid level sensor. Disconnect the supply line (arrow, 2) hydraulic clutch drive. Press the plates (3) securing the reservoir, located on the left and right, and remove the reservoir (4) from the master brake cylinder.
When installing the "DSC" system on a vehicle, it is necessary to additionally loosen the fastening clamp and disconnect the supply hose of the "DSC" booster pump from the master cylinder reservoir. In this case, the booster hose must be fixed in a vertical position so that the brake fluid does not leak out.
Installation of the master cylinder expansion tank should be carried out in the reverse order, while checking the rubber bushings (2. Fig. 11.44) coupling of the reservoir with the main brake cylinder and replace them if necessary. Bleed the brake system.
(You can find the original version on the portal: BMWMan)