BMW 7 Series: Removing And Installing Vane Pump For Hydraulic Steering

NOTE: See procedure for POWER STEERING PUMP FOR POWER STEERING GEAR WITH ACTIVE FRONT STEERING (N63) or POWER STEERING PUMP FOR HYDRAULIC STEERING GEAR WITH DYNAMIC DRIVE (N63).

REMOVING AND INSTALLING/RENEWING DYNAMIC DRIVE EXPANSION HOSE PART 2 (IN FRONT WHEEL ARCH)

Notes

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

Close off pipe connections with plugs. 32 1 270

Recycling

Catch and dispose of hydraulic fluid in a suitable container.

Necessary preliminary tasks

• Remove right FRONT WHEEL
• Remove FRONT RIGHT WHEEL ARCH COVER REAR SECTION
• Remove UNDERBODY PROTECTIVE PLATE
• Remove STIFFENING PLATE (N74 only)
• Remove right STEERING ASSEMBLY COVER
• Remove right UNDERBODY PANELLING

IMPORTANT: Pressure line and connection on valve block must be fitted with suitable sealing plugs immediately after removal!

Release screws (2) and tie lines to one side.

Tightening torque 37 13 3AZ.

Fig. 123: Identifying Power Steering Pump Lines Screws

Release screw (1) for pressure line on valve block.

Tightening torque 37 13 3AZ.

Fig. 124: Identifying Power Steering Pump Pressure Line Screws

Remove rubber damper (1).

Installation: Make sure pressure lines are laid without tension and with sufficient spacing to adjoining components.

Fig. 125: Identifying Rubber Damper

Release screws (1) from line flange in engine compartment.

Remove pressure line towards rear.

Tightening torque 37 13 8AZ.

Fig. 126: Identifying Engine Compartment Flange Line Screws

IMPORTANT: When assembling, make sure that in succession only the sealing plugs of the line to be fitted are removed.

Replace affected line if sealing ring is damaged.

After installation

• Fill and bleed HYDRAULIC SYSTEM
• Check line connections for leaks
• Carry out INITIAL DYNAMIC DRIVE OPERATION

REMOVING AND INSTALLING/REPLACING ARS EXPANSION HOSE PART 3

Notes

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

Do not draw off hydraulic fluid (risk of contamination).

Close off pipe connections with plugs. 32 1 270

Recycling

Catch and dispose of hydraulic fluid in a suitable container.

Necessary preliminary tasks

• Remove front UNDERBODY PROTECTION

IMPORTANT: Pressure line and connections must be provided with suitable plugs immediately after removal!

Release screws from line flange (1) and (2) and remove line.

Tightening torque 37 13 8AZ.

Fig. 127: Identifying Screws On Flange

IMPORTANT: When assembling, make sure that in succession only the sealing plugs of the line to be fitted are removed.

Replace affected line if sealing ring is damaged.

After installation

• Fill and bleed HYDRAULIC SYSTEM
• Check line connections for leaks
• Carry out INITIAL DYNAMIC DRIVE OPERATION

REMOVING AND INSTALLING/REPLACING ARS EXPANSION HOSE PART 4

Notes

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

Close off pipe connections with plugs. 32 1 270

Recycling

Catch and dispose of hydraulic fluid in a suitable container.

IMPORTANT: Pressure line and connections must be provided with suitable plugs 32 1 270 immediately after removal!

ARS expansion hose part 4 overview:

ARS EXPANSION HOSE LINES REFERENCE CHART

1. Line 1
2. Line 2
3. Line 3

Fig. 128: Identifying ARS Expansion Hose Lines

Removing line 1:

Necessary preliminary tasks

• Lower FRONT AXLE SUPPORT

Release screws (1) from line flange in engine compartment.

Replace sealing ring.

Tightening torque 37 13 8AZ.

Fig. 129: Identifying Engine Compartment Flange Line Screws

Release screw (1) from holder of oil cooler line over front axle carrier.

Release holder in front axle carrier (see arrow) of pressure line (2).

Fig. 130: Releasing Front Axle Carrier Holder Of Pressure Line

Release screw connection (1) on T-piece.

Tightening torque 37 13 5AZ.

Feed out line through wheel arch.

Fig. 131: Removing ARS Expansion Hose Line From Wheel Arch

Removing line 2:

Necessary preliminary tasks

• Remove UNDERBODY PROTECTION
• Release ACTIVE STABILIZER from front axle carrier and tie up
• Remove front pressure line from active stabilizer
• Remove ARS EXPANSION HOSE PART 3

Release both nuts (1) from line holder.

Release screw connection (2) and remove line.

Tightening torque 37 13 5AZ.

Fig. 132: Identifying ARS Expansion Hose Line Holder Nut And Screw Connection

Removing line 3:

Necessary preliminary tasks

• Remove UNDERBODY PROTECTION
• Remove ACTIVE STABILIZER from front axle carrier and hang up
• Remove front pressure line from active stabilizer
• Remove ARS EXPANSION HOSE PART 3

Unfasten screw fitting (1).

Tightening torque 37 13 5AZ.

Fig. 133: Identifying ARS Expansion Hose Line Screw Fitting

Release screw (1) on line holder.

Feed out line upwards to remove.

Fig. 134: Identifying ARS Expansion Hose Line Holder Screw

IMPORTANT: When assembling, make sure that in succession only the sealing plugs of the line to be fitted are removed.

When fitting lines, do not tilt connectors (sealing rings!) and connect fully before screwing.

Do not replace sealing rings on hydraulic lines.

Replace affected line if sealing ring is damaged.

After installation

• Fill and bleed HYDRAULIC SYSTEM
• Check line connections for leaks
• Carry out INITIAL DYNAMIC DRIVE OPERATION

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