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Home >> BMW >> 2018 >> 440i 2D Convertible >> Repair and Diagnosis >> Body & Frame >> Sun Roof/T-Top/Convertible Top >> Sunroof & Convertible Top - Repair (F32, F33 & F36) >> 54 37 Retractable Hardtop >> Removing and installing/replacing right main kinematics hydraulic cylinder (4' Series Convertible)

Removing and installing/replacing right main kinematics hydraulic cylinder (4' Series Convertible)

Necessary preliminary tasks: 

IMPORTANT: Hydraulic fluid may emerge from the disconnected lines and the open connections on the hydraulic cylinder.
Protect components and work area with suitable materials (e.g. cloths).

Makes hydraulic system depressurized: 

IMPORTANT: The roof shells lower.

Feed out control unit (1).

Use a hexagon socket (AF 4) to slowly open the shutoff valve on the hydraulic unit by three turns.

NOTE: Shutoff valve is located under a plastic funnel.
G10206435Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

Installation note: 

Ensure that the wiring harness (2) is accurately routed in the main bearing.

G10206760Courtesy of BMW OF NORTH AMERICA, INC.

Unclip cover (1).

G10206761Courtesy of BMW OF NORTH AMERICA, INC.

Removing hydraulic cylinder:

G06181319Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect all cable straps.

Installation note: 

Replace faulty cable straps.

Unfasten plug connection (3) and disconnect.

Detach retaining clip (1).

Undo the screw (2) and remove the lock washer.

Detach hydraulic lines.

IMPORTANT: Protect joints (lines and cylinder) against dripping fluid, e.g. with a cleaning cloth.
G06181320Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: