23 42 551 Replacing hydraulic pump GS6S53BZ (SMG)
WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Before working on hydraulic system:
- Disconnect hydraulic pump relay
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:
Replace hydraulic pump relay .
NOTE:
After completing work:
- Check fluid level in hydraulic system by means of DIS Tester "Service Function" . See 21 53... CHECKING/TOPPING UP FLUID LEVEL IN HYDRAULIC SYSTEM (GS6S37BZ/GS6S53BZ/ SMG) .
- 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 . See MANUAL TRANSMISSION - TIGHTENING TORQUES .
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 . See MANUAL TRANSMISSION - TIGHTENING TORQUES .
Remove hydraulic pump.
Installation:
Replace sealing ring.
Moisten sealing ring (1) with Pentosin and push onto tank fitting.
NOTE:
After completing work:
- Check fluid level in hydraulic system by means of DIS Tester "Service Function" . See 21 53... CHECKING/TOPPING UP FLUID LEVEL IN HYDRAULIC SYSTEM (GS6S37BZ/GS6S53BZ/ SMG) .
- Perform "Bleed hydraulic system" service function by means of DIS Tester
- Perform "Teach in transmission" service function by means of DIS Tester