32 41 037 Removing and Installing/Replacing Power Steering Pump For Hydraulic Steering Gear With Dynamic Drive

32 41 037 - Removing and installing/replacing power steering pump for power steering gear with Dynamic Drive (N52)





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.





Warning!
Danger of poisoning 00 .. ... Danger of Poisoning If Oil Is Ingested/Absorbed Through the Skin if oil is ingested/absorbed through the skin!
Risk of injury 00 .. ... Risk of Injury If Oil Comes Into Contact With Eyes and Skin if oil comes into contact with eyes and skin!

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





Necessary preliminary tasks:
- Draw off and dispose of hydraulic fluid from fluid reservoir
- Remove belt pulley 32 41 100 Removing and Installing/Replacing Belt Pulley on Vane Pump For Power Steering





Note:
a) - Power steering pump (up to 10/07) with pulsation damper (1)
b) - Power steering pump (10/07 to 04/08) without pulsation damper





Release hose clamp (1) and detach suction line from power steering pump.
Release banjo bolt (2) and detach pressure line for Dynamic Drive from power steering pump.
Release banjo bolt (3) and detach pressure line from power steering pump.

Installation:
Replace all sealing rings.
Make sure hydraulic lines are laid without tension and with sufficient spacing to adjoining components.
Align suction line by way of "P" marking to connection on power steering pump.
Tightening torque 32 41 4AZ 32 41 Pump and Oil Supply (for power steering).
Tightening torque 32 41 9AZ 32 41 Pump and Oil Supply (for Dynamic Drive valve block with pulsation damper).





Important!
Aluminium-magnesium materials.
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).





Version with active front steering: Disconnect plug connection (1).
Release screws (2, 5).

Installation:
Reinstall holder (3).
Make sure vent line (4) is correctly seated in holder retaining clip (3).
Replace aluminium screws.
Observe screwing sequence!





Release bolts (1) and remove power steering pump towards top.

Installation:
Replace aluminium screws.
Observe screwing sequence!





Screwing sequence:
1. Secure power steering pump with screws
2. Tighten side screws to 2 Nm
3. Tighten front screws to 2 Nm
4. Tighten down front screws to jointing torque and angle of rotation
Tightening torque 32 41 3AZ 32 41 Pump and Oil Supply.
5. Release screws at side and check screw fastening points for gap freedom
6. Tighten down side screws to jointing torque and angle of rotation
Tightening torque 32 41 3AZ 32 41 Pump and Oil Supply.





After installation:
- Fill and bleed hydraulic system 32 13 006 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