Repair Instructions for Convertible Top Hydraulic System
54 34 ... - Repair instructions for convertible top hydraulic system1. -
Definitions of terms2. -
When working on hydraulic system, observe the following***TD*** - After it has been removed, the convertible top must be safely set down or spread out.
The special tool 54 3 200 Convertible Top Take-Up Fixture must be used.
The universal lifter 00 2 030 Universal Hydro-Lifter Basic Unit is absolutely required here.
| ***TD*** - When the hydraulic system is open (unscrewing of lines, topping up of fluid, etc.), always provide sufficient cloths to catch leak-off fluid.
Also provide an adherent protective cover to cover/protect fittings.
| ***TD*** - When opening the hydraulic system, make absolutely sure that no dirt, dust or chips can get into the hydraulic circuit.
| ***TD*** - Disconnect feed and return lines if possible at a later stage, when the convertible top is stowed and untensioned (check fluid, see also Point 3).
| ***TD*** - Once the hydraulic system has been opened, first check the fluid level after completing the tasks before carrying out a function test.
| ***TD*** - After disconnecting the hydraulic lines from hydraulic components, do not move the convertible top if at all possible (fluid can escape from joints).
| ***TD*** - Piston rods must not be damaged (e.g. scratches). Even paint mist and welding spots are harmful.
When working in the vicinity of hydraulic cylinders, cover the cylinders with suitable materials.
| ***TD*** - If the hydraulic unit or the lines stay removed for an extended period of time, the bores on the hydraulic unit and the hose connections must be sealed off.
| 3. -
Mechanical convertible top operation***TD*** - Open shut-off valve for emergency opening on hydraulic unit.
| ***TD*** - Lower side windows at front slightly and at rear completely.
| ***TD*** - Convertible top emergency operation Opening/Closing Convertible Top In Event of A Technical Fault.
| ***TD*** - In the event of repeated actuation, the system fluid is pumped into the supply tank of the hydraulic unit. If hydraulic components are now replaced, there will be too much fluid in the system. This may cause damage to the system in event of actuation. (Checking fluid level, see Points 4 and 5).
| 4. -
Checking fluid level***TD*** - When the convertible top is closed.
| ***TD*** - Follow brief instructions Topping Up/Extracting Fluid, Checking Fluid Level.
| ***TD*** - Fluid level must be within the markings (circle/cross).
| ***TD*** - Fluid is supplied with the repair kits (e.g. banjo bolts/seals, hoses, cylinders) and is available separately (refer to BMW Parts Service).
| 5. -
Topping up/extracting fluid***TD*** - 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.
| ***TD*** - Follow brief instructions Topping Up/Extracting Fluid, Checking Fluid Level.
| ***TD*** - Remove hydraulic unit without detaching lines.
| ***TD*** - Fluid is supplied with the repair kits (e.g. banjo bolts/seals, hoses, cylinders) and is available separately (refer to BMW Parts Service).
| ***TD*** - Pour in fluid with bottle through filling orifice.
| ***TD*** - In the event of overfilling, allow the fluid to escape through the filling orifice and catch the fluid in a suitable container.
| 6. -
Bleeding hydraulic system***TD*** - If there is a significant build-up of noise while the convertible top is moving, the convertible top must be opened and closed several times. The hydraulic system is automatically bled in the fluid reservoir in the process.
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