Removing and installing auxiliary hydraulic pump for gearbox oil — AUDI

🧭 Before you start

Fits: Audi A6/A7 C7 (4G, 2011–2018); platform code 4X

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• Risk of damage to gearboxThe engine must not be started when there is no more ATF in the gearbox and the mechatronic unit has been removed. — Shift gearbox into position "“P”".
• Due to O-ring (D), the auxiliary hydraulic pump 1 for gearbox oil V475 fits tightly in the gearbox housing.
• If the seat of the O-ring is damaged or scratched, the auxiliary hydraulic pump 1 for gearbox oil V475 must be renewed.
• Make sure that electrical connector is properly engaged and secured.

📋 Procedure

1. ⚠ Risk of damage to gearboxThe engine must not be started when there is no more ATF in the gearbox and the mechatronic unit has been removed. — Shift gearbox into position "“P”".
2. Switch off ignition.
3. Remove ATF oil pan .
4. Remove ATF filter .
5. ⚠ The gearbox control unit (mechatronic unit) can be irreparably damaged by electrostatic discharge.Before handling electrical connectors, mechanic must discharge static. To do so, touch an earthed metal object, such as a heater radiator or lifting platform, with your hand.Do not touch contact pins in gearbox connector with bare hands. — Carefully unplug electrical connector (B) for auxiliary hydraulic pump 1 for gearbox oil V475(A).

6. Remove securing bolts in the sequence (3 ... 1).
7. Detach auxiliary hydraulic pump 1 for gearbox oil V475(A) from gearbox housing. [Note: Due to O-ring (D), the auxiliary hydraulic pump 1 for gearbox oil V475 fits tightly in the gearbox housing.] [Note: The connector contacts must not be interchanged.The illustration shows the electrical wire (1) with the mechatronic unit removed; the items marked (4, 5) and (arrows) can therefore be disregarded.]
8. Carefully renew O-ring (D) on auxiliary hydraulic pump 1 for gearbox oil V475 by hand, without using tools. [Note: If the seat of the O-ring is damaged or scratched, the auxiliary hydraulic pump 1 for gearbox oil V475 must be renewed.]
9. Fit auxiliary hydraulic pump 1 for gearbox oil V475 with new O-ring (D).
10. Tighten securing bolts in the sequence (1 ... 3).
11. Plug in electrical connector (B) for auxiliary hydraulic pump 1 for gearbox oil V475(A). [Note: Make sure that electrical connector is properly engaged and secured.]
12. Route electrical wiring (C) as shown in illustration and secure (arrows).
13. Install ATF filter .
14. Install ATF oil pan .
15. Fill up with ATF .

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