32 41 060 Removing and installing or replacing power steering vane pump (N51, N52, N53)
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminium screws/bolts exclusively.
Aluminium screws/bolts must be replaced each time they are released .
The end faces of aluminium screws/bolts are painted blue for the purposes of reliable identification.
Jointing torque and angle of rotation must be observed without fail (risk of damage).
Close off pipe connections with plugs.
Necessary preliminary tasks:
- Draw off and dispose of hydraulic fluid from fluid reservoir
- Remove Intake Filter Housing
- Replacement only: Slacken screws of Belt Pulley
- Relieve tension on Drive Belt and remove from belt pulley
Release hose clamp (1) and detach suction line (2) from vane pump.
Installation:
Align suction line by way of marking to connection on vane pump.
Release bolt (1) and remove bracket with refrigerant line.
Release screws (2).
Installation:
Replace aluminium screws.
Observe screwing sequence.
Remove Front Underbody Protection .
Remove radiator seal.
Release banjo bolt (1) and disconnect pressure line.
Installation:
Replace all sealing rings (D).
Make sure pressure line is laid without tension and with sufficient spacing to adjoining components.
For tightening torque refer to 32 41 8AZ in 32 41 PUMP AND OIL SUPPLY .
Replacement only: Unscrew bolts and remove belt pulley.
Release bolts (2) and remove vane pump towards bottom.
Installation:
Replace aluminium screws.
Observe screwing sequence.
Screw-fastening sequence:
- Secure vane pump with screws
- Tighten front screws to 2 Nm
- Tighten side screws to 2 Nm
- Tighten down front screws to jointing torque and angle of rotation
For tightening torque refer to 32 41 6AZ in 32 41 PUMP AND OIL SUPPLY .
- Release screws at side and check screw fastening points for gap freedom
- Tighten down side screws to jointing torque and angle of rotation
For tightening torque refer to 32 41 6AZ in 32 41 PUMP AND OIL SUPPLY .
After installation:
- Fill and Bleed Hydraulic System
- Check pipe connections for leaks