Removing and Installing Power Steering Pump for Power Steering Gear With Dynamic Drive (N73)

32 41 037 - Removing and installing power steering pump for power steering gear with Dynamic Drive (N73)





Important!
Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.
Close off pipe connections with plugs.





Note:
When replacing power steering pump:
Fluid reservoir Service and Repair 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 drive belt Replacing Alternator Drive Belt
- Remove front assembly underside protection Removing and Installing/Replacing Front Underbody Protection





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

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





Release banjo bolt and disconnect power steering pressure line (1) from power steering pump.

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

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

Installation Note:
Align suction line (2) by way of marking to connection on power steering pump.





Unscrew nut (1).
Release bolt (2) and nut (3).
Remove power steering pump.

Installation Note:
1. Replace self-locking nuts
2. Tighten down bolt (2) and nut (3).
Tightening torque 32 41 1AZ Pump and Oil Supply.
3. Tighten knurled stud (4) hand-tight against housing of power steering pump
4. Tighten nut (1)
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
- If necessary, carry out initial Dynamic Drive operation Initial Operation With Test Run of Dynamic Drive