Removing and installing hydraulic pipe to upper hydraulic cylinder — AUDI
Removing and installing hydraulic pipe to upper hydraulic cylinder on Audi: factory workshop procedure. Full factory text, tools and checks.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
📋 Procedure
ℹ️ Torque figures below come verbatim from workshop data — always cross-check against your vehicle's factory manual before final tightening.
Observe rules for cleanliness => Page
61-94
.
Special tools and workshop equipment required
Mandrel 3335
Removing
Notes:
The hydraulic pipes are supplied in pairs (supply and return).
Start from hydraulic pump when removing hydraulic pipe.
Remove catch for convertible top compartment => Page
61-120
.
Remove hydraulic pump => Page
61-101
.
Unscrew connection plate => Fig.
61-104
.
Use small screwdriver to lift spring lock washer -1- at hydraulic pipes to be removed (supply and return) over collar at connection piece and remove.
Unfasten appropriate hydraulic pipe cable tie and pull hydraulic pipe out of connection plate.
Pull hydraulic pipes through into convertible top compartment.
Remove convertible top compartment lid lock.
Unfasten all cable ties at mounting bracket.
Pull out hydraulic pipe -1- around mounting bracket as well as between gas-filled strut and stop -arrow-.
Protect convertible top compartment against hydraulic fluid emerging.
Remove upper hydraulic cylinder => Page
61-115
and place it in convertible top compartment.
Transfer letter markings on hydraulic pipes to hydraulic cylinder.
Unscrew union nuts at hydraulic cylinder.
Completely pull out hydraulic pipes around mounting bracket.
Installing
Install in reverse order, paying attention to the following:
Note:
Take care not to interchange supply and return pipe.
Tighten union nuts of hydraulic pipes.
Tightening torque: 28 Nm
Insert hydraulic pipe -1- between gas-filled strut and stop -arrow- and place around mounting bracket.
Lay hydraulic pipes and wires as shown and secure with 3 cable ties -1- at hydraulic cylinder -2-.
3 -
Supporting ring
-Designed to prevent kinking
Pull hydraulic pipe with red mark -arrow- through as far as cable tie at mounting bracket.
Fasten cable tie over red mark.
Insert hydraulic pipe with connection piece through connection plate.
Slip sleeve -1- of mandrel 3335 over connection piece.
Slip spring lock washer -2- over sleeve and press home with mandrel 3335.
Note:
Spring lock washer -2- must be slipped completely over collar at connection piece -1-.
Coat sealing ring -3- with hydraulic fluid and slip it onto connection piece.
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.