Questions and Answers
Audi Cabriolet Top Pump
Q. I have hydraulic oil leakage problem on a 1994 Audi Cabriolet 2.0 litre. The leak is from under the hydraulic pump that operates the folding canvas hood. This pump is located in the boot (trunk) on the right hand side. I have loosened the single nut securing the back of the cradle that holds the pump but there appears to be some further fastener (that is not visible) needed to loosen before the pump can be removed.
I can find no way of approach to this second fastener. Will it be necessary to remove the fuel tank before I can proceed further?
If not familiar with this problem, could you please advise where I can obtain an instruction manual that covers this condition?
Thank you,
JackA. Here is the procedure:
Hydraulic Pump, Removing and Installing:
- Disconnect all harness connectors
¤ Tightening torque for bolts -5-: 24 Nm (18 ft lb)
- Remove nut -1- together with plate -2-.
- Loosen nut -7-and lift hydraulic pump -8-together with crash cover -9- and plate -6- out of rear bracket.
- Remove pump out from front bracket toward rear and lift out.
¤ Tightening torque for nuts -1- and -7-: 30 Nm (22 ft lb)
- To remove front bracket -3-, remove bolts -5- together with washers -4- then remove bracket.
Removing Hydraulic Pump From Bracket:
- Remove Torx® screws -3- from both sides.
¤ Apply locking compound AMV 185 400 A2 to screws when installing
¤ Tightening torque: 10 Nm (7 ft lb)
- To remove crash cover -2-, remove Torx® screw -1- and screws -4- from both sides and lift off cover.
- Remove socket-head screws (4 x) (arrows).
¤ Tightening torque: 10 Nm (7 ft lb)
¤ Apply locking compound, AMV 185400 A2, to screws when installing.
¤ Fourth screw is located behind hydraulic hoses and is not visible.
- Remove connecting plate from hydraulic pump.
When installing connecting plate, make sure connecting plate and surface on hydraulic pump are parallel.
CAUTION! The hydraulic system is very sensitive to contaminates. The relevant components must be covered immediately after the hydraulic system is opened to prevent any dirt or debris from entering the system.
- Cover connecting surface for connecting plate with adhesive tape or equivalent.
- Remove hydraulic pump from vehicle.
Note: Spread out paper or other suitable material to catch any drips of hydraulic fluid from the disconnected connecting plate.
CAUTION! The convertible top must not be operated (even by hand) when the hydraulic system is opened.
- Install in reverse order of removal.
There is a TSB that may be applicable to your vehicle:
TSB Number Issue Date TSB Title 619701 NOV 97 Convertible Top - Slow or Inoperative It might be worth taking to your Audi dealer before doing anything.
