Removing and Installing Power Steering Pump for Power Steering Gear with Dynamic Drive (N54)

32 41 037 - Removing and installing power steering pump for power steering gear with Dynamic Drive (N54)





Warning!
Danger to life!
Secure engine in installation position Securing Engine in Installation Position to prevent it from falling down.

Important!
Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.
Seal off hydraulic lines with plugs.





Note:
When replacing power steering pump:
Fluid reservoir Removing and Installing/Replacing Fluid Reservoir for Power Steering with Dynamic Drive/Active Front Steering must be replaced in event of metal abrasion, sluggish pump shaft or increased wear!
The filter integrated in the fluid reservoir can only absorb a limited amount of foreign particles. If the filter clogs, the hydraulic system can no longer be sufficiently protected.
Metal abrasion is perceived in the fluid reservoir as metallically glittering hydraulic fluid.
It is only necessary to replace the fluid reservoir because of leaks (e.g. at hose connections) only in the event of the unavoidably high ingress of dirt.





Necessary preliminary tasks:
- Draw off and dispose of hydraulic fluid from fluid reservoir
- Remove belt pulley Removing and Installing/Replacing Belt Pulley on Vane Pump for Power Steering
- Lower front axle carrier Lowering/Raising Front Axle Carrier





Release bolts (1).
Tightening torque 32 41 5AZ Pump and Oil Supply.
Release banjo bolt (2) and disconnect Dynamic Drive pressure line (3) with bracket from power steering pump.

Installation Note:
Replace all sealing rings.
Make sure hydraulic line is laid without tension and with sufficient spacing to adjoining components.
Tightening torque 32 41 3AZ Pump and Oil Supply.





Release hose clamp (2) and detach suction line from power steering pump.

Installation Note:
Markings (1) on suction line and power steering pump connection must match up.

Version with active front steering: Disconnect plug connection (3).

Release banjo bolt (4) and detach pressure line from power steering pump.

Installation Note:
Replace all sealing rings.
Make sure hydraulic lines are laid without tension and with sufficient spacing to adjoining components.
Tightening torque 32 41 3AZ Pump and Oil Supply.





Release screws (1, 2).
Remove power steering pump towards front.

Installation Note:
Screw-fastening sequence:
1. Secure power steering pump with screws
2. Tighten screw (2) to 2 Nm
3. Tighten screws (1) to 2 Nm
4. Tighten down screws (1)
Tightening torque 32 41 1AZ Pump and Oil Supply.
5. Release screw (2) and check screw fastening point for gap freedom
6. Tighten down screw (2)
Tightening torque 32 41 1AZ Pump and Oil Supply.





After installation:
- Fill and bleed hydraulic system Bleeding Power Steering (Version with Dynamic Drive)
- Check pipe connections for leaks
- Carry out steering angle sensor adjustment/adjustment for active front steering
- If necessary, carry out initial Dynamic Drive operation Initial Inspection and Diagnostic Overview