Hydraulic Pump Wheel

Electric/Hydraulic Convertible Top

Hydraulic Pump Wheel

CAUTION!
Hydraulic system is sensitive to any ingress of dirt.

As soon as system is opened, corresponding components must be covered so that no dirt can enter hydraulic system.

Before working on electrical system: Disconnect battery ground (GND) strap.

Removing

• Obtain radio code before disconnecting battery.

- Disconnect Ground (GND) strap from battery.

- Remove left luggage compartment trim.

- Disconnect harness connector - 5 - from Convertible Top Hydraulic Pump (V118).





- Loosen toggle bolt - 1 - so that residual pressure can escape the system, then tighten again.

- Mark hydraulic lines - 3 - before disconnecting. Remove Torx bolts - 2 - (7 Nm).

- Carefully pull hydraulic lines - 3 - out of openings.

- Remove hex nut - 4 - (5 Nm).

Installing

Installation is performed in the reverse order of removal.

• Check for damage and proper fitting of O-rings when installing hydraulic lines.

• After installation of hydraulic pump, hydraulic system must be filled and bled again. Refer to => [ Hydraulic System, Filling and Bleeding ] Electric/Hydraulic Convertible Top (Overviews).

• After connecting battery, vehicle options (radio, clock, electric window regulator) must be checked according to repair information and/or user manual.

Hydraulic Pump Wheel

Removing

- Remove hydraulic pump.

• Hydraulic system is sensitive to any ingress of dirt.

• Components must be covered as soon as the system is opened.

• Before removing the hydraulic unit, place a container under pump and catch escaping oil.





- Set hydraulic unit with reservoir down vertically in an suitable container and secure it from tipping over.

- Open toggle bolt so that hydraulic oil can flow out of pump unit into reservoir.

- Remove Torx bolts - 2 - (5 Nm, always replace) and disconnect motor - 1 - from hydraulic pump.

- Remove pump wheel - 1 - from drive shaft - 2 -.





- Remove metal tongue - 3 - from pump housing (metal tongue will be damaged if left in pump housing).

Metal tongue - 3 - is no longer required.

Installing

- Press new pump wheel - 1 - onto drive shaft - 2 -.





Pump wheel fits only in one position on drive shaft.





- Pull off old O-ring - 4 - from hydraulic pump - 5 - and replace with new O-ring.

- Position motor - 1 - with new pump wheel onto hydraulic pump - 5 - and install with new bolts - 2 - (bolts - 2 - are micro-encapsulated, tightening torque 5 Nm).

- Install hydraulic pump.

- Hydraulic system, filling and bleeding, refer to => [ Hydraulic System, Filling and Bleeding ] Electric/Hydraulic Convertible Top (Overviews).