Hydraulic Pump: Service and Repair

23 42 551 - Replacing hydraulic pump GS6S53BZ (SMG)

Important!
Before working on hydraulic system:
- Disconnect hydraulic pump relay Service and Repair in electronics box
Do not reconnect relay for entire duration of repair work
- Reduce pressure in hydraulic system by means of Service Function in DIS Tester

Installation Note:
Replace hydraulic pump relay.

Note:
After completing work:
- Check fluid level in hydraulic system Service and Repair by means of DIS Tester "Service Function"
- Perform "Bleed hydraulic system" service function by means of DIS Tester
- Perform "Teach in transmission" service function by means of DIS Tester

Necessary preliminary tasks:
- Remove underbody protection
- Remove right heat shield

Release screw (1) and remove grounding strap.

Release screws (1).
Tightening torque 23 41 7AZ [1][2]Automatically Shifted Manual Transmission/Transaxle.
Remove plate (2).

Unclip cable (1) from mounting (2).

Release plug connection (1) from mounting and disconnect.

Detach line (1).
Release bolts (2).
Tightening torque 23 41 7AZ/12AZ [1][2]Automatically Shifted Manual Transmission/Transaxle.
Remove hydraulic pump.

Installation Note:
Replace sealing ring.
Moisten sealing ring (1) with Pentosin(R) and push onto tank fitting.