34 51 550 Removing and installing/replacing DSC3 pre-charging pump (with charging piston unit)

NOTE: Follow general instructions,
Refer to 34 00... GENERAL DATA
After completing work, the pre-boost pump circuit must be bled by activating with the BMW Diagnosis and Information System (DIS).

Disconnect plug connector (1) and unclip connector housing (2) from bracket (3) with a quarter turn to the left.

Installation:

Ensure proper locking of the plug connector.

Fig 1: Disconnecting Plug Connector & Uncliping Connector Housing From Bracket

Disconnect suction hose (1) with special tool 13 3 010. Open hose clip (2) and pull off suction hose.

Unscrew pressure line (3) from boost piston unit.

Installation:

Tightening torque. Refer to BRAKES - TIGHTENING TORQUES .

Fig 2: Identifying Suction Hose, Hose Clip & Pressure Line

Unfasten (1) screws and remove bracket (2) upward. Pull pre-boost pump upward out of lower bracket.

Installation:

Ensure proper seating of rubber mounts.

Fig 3: Unfastening Screws & Removing Bracket