32 41 037 Removing And Installing/Replacing Power Steering Pump For Hydraulic Steering Gear With Dynamic Drive (N55)

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NOTE: When replacing power steering pump:
OIL RESERVOIR must be replaced in event of metal abrasion, sluggish pump shaft or increased wear!
The filter integrated in the oil 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 oil reservoir as metallically glittering hydraulic fluid.
Replacement of the oil reservoir due to a leak (e.g. at the hose connections) is only required with unavoidable high penetrations of dirt.

WARNING: DANGER OF POISONING if oil is ingested/absorbed through the skin!
DANGER OF INJURY 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 seal plugs.

IMPORTANT: Aluminum screws/bolts must be replaced each time they are released .
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic.
Jointing torque and angle of rotation must be observed without fail (risk of damage)!

Necessary preliminary tasks:

Draw off and dispose of hydraulic fluid from oil reservoir.
Remove front UNDERBODY PROTECTION .
Remove front reinforcement plate.
Remove FAN COWL .
Remove CHARGE-AIR DUCT .
Remove AIR INTAKE SILENCER HOUSING .
Remove AIR CONDITIONING COMPRESSOR .
Remove power steering pump BELT PULLEY .

Release screws (1).

Tightening torque: 32 41 9AZ .

Installation note:

Replace aluminum screws .

Observe screwing sequence.

Fig 1: Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock plug connections (1) and (3) and disconnect.

Release screw (1).

Tightening torque: 32 41 9AZ .

Installation note:

Replace aluminum screws .

Observe screwing sequence!

Fig 2: Plug Connections And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Loosen screws (4) and set line aside.

Tightening torque: 32 41 14AZ .

Twist power steering pump and release lines:

Release hose clamp (3) and detach intake pipe from power steering pump.

Release screw (2) and detach pressure line from power steering pump.

Tightening torque: 32 41 5AZ .

Release screws (1) and detach ARS expandable hose from power steering pump.

Fig 3: Hose Clamp And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque: 32 41 13AZ .

Installation note:

Replace hose clamp (3).

Align intake pipe by way of "P" marking to connection on power steering pump.

Replace all sealing rings.

Make sure hydraulic lines are laid without tension and with sufficient distance to adjoining components.

Screw-fastening sequence:

Secure power steering pump with screws.
Tighten side screw to 2 Nm.
Tighten front screws to 2 Nm.
Tighten down front screws to jointing torque and angle of rotation.
Tightening torque: 32 41 9AZ .
Release screw at side and check screw fastening points for gap freedom.
Tighten down side screws to jointing torque and angle of rotation.
Tightening torque: 32 41 9AZ .

After installation:

Fill and bleed HYDRAULIC SYSTEM .
Check line connections for leaks.
If necessary, carry out START-UP DYNAMIC DRIVE OPERATION .