54 34... Topping Up/Extracting Fluid, Checking Fluid Level

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NOTE: No changing of the hydraulic fluid necessary.

The hydraulic fluid does not have to be changed because the system is filled with life-time fluid.
Only the approved hydraulic fluid may be used in the event of leaks.
All hydraulic cylinders must be completely extended.
The hydraulic system is automatically bled by repeated actuation.

Necessary preliminary tasks:

Remove hydraulic control unit (hydraulic system closed/do not disconnect lines). Refer to 54 34 005 Removing And Installing/Replacing Hydraulic Control Unit For Convertible Top Drive .

IMPORTANT:

Protect components and work area with suitable materials (e.g. cloths).

Use only Aral Vitamol ZH-M fluid (refer to BMW Parts Service).

Do not allow fluid to flow over components.

Checking fluid level:

Convertible top closed
Close convertible top compartment lid
To release, remove hydraulic control unit without lines from foam inlay.

Fluid level must be within the markings convertible top is closed and the control unit is horizontal.

Maximum
Minimum

Fig 1: Identifying Fluid Level (Maximum & Minimum)
Courtesy of BMW OF NORTH AMERICA, INC.

Topping up fluid:

Convertible top closed
Close convertible top compartment lid
To release, remove hydraulic control unit without lines from foam inlay.
Total filling quantity: 450 - 500 ml

Open oil filler plug.

Tightening torque: see 54 34 11AZ in 54 34 MOTOR-DRIVEN CONVERTIBLE TOP (ELECTRICAL COMPONENTS) .

Set down hydraulic control unit as pictured and pour in fluid quantity from fluid bottle (use a funnel if necessary).

Check fluid level in the meantime.

IMPORTANT: Do not overfill.

Fig 2: Identifying Oil Filler Plug

Courtesy of BMW OF NORTH AMERICA, INC.

Extracting fluid:

Convertible top closed
Close convertible top compartment lid
To release, remove hydraulic control unit without lines from foam inlay.

Open oil filler plug.

Tightening torque: see 54 34 11AZ in 54 34 MOTOR-DRIVEN CONVERTIBLE TOP (ELECTRICAL COMPONENTS) .

Tilt hydraulic unit and let fluid flow out or draw off with a suitable auxiliary apparatus.