31 11 506 Lowering/Raising Front Axle Carrier

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Special tools required:

00 2 030
00 2 040
31 4 011
31 4 012
33 3 274

WARNING:

Danger to life!

Secure engine in installation position to prevent it from falling down. See 11 00 670 SECURING ENGINE IN INSTALLATION POSITION (N73)

IMPORTANT:

Observe safety instructions on raising the vehicle. See 00..... LIFTING VEHICLE WITH A LIFTING PLATFORM

Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.

Seal off hydraulic lines with plugs.

Necessary preliminary tasks:

Secure engine in installation position . See 11 00 670 SECURING ENGINE IN INSTALLATION POSITION (N73)
Remove underbody protective plate. See 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION and 51 47 491 REMOVING AND INSTALLING/REPLACING REAR UNDERBODY PROTECTION
Remove air duct for brake ventilation on both sides. See 35 11 000 REMOVING AND INSTALLING MOUNTING BLOCK FOR PEDALS
Remove reinforcement plate . See 31 10 010 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE
If necessary, remove steering gear cover on both sides. See POWER STEERING GEAR
Remove universal joint from power steering gear . See 32 31 211 REPLACING UNIVERSAL JOINT FOR LOWER SECTION OF STEERING SPINDLE
Disconnect plug connection on Servotronic converter
Disconnect plug connection from ride-height sensor
If necessary, disconnect vacuum line from electrically operated valve to engine mounts at T-piece
If necessary, disconnect pressure line for power steering from front axle carrier

Version with Dynamic Drive:

Draw off and dispose off hydraulic fluid from fluid reservoir.

Observe country-specific waste-disposal regulations

Remove bottom right wheel arch trim. See 51 71... REMOVING AND INSTALLING/REPLACING FRONT BOTTOM RIGHT WHEEL ARCH TRIM

Remove underbody panelling cover on right. See 51 47... REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT UNDERBODY PANELING

Release nut (1) for Dynamic Drive pressure line.

Tightening torque 37 14 13AZ. See 37 14 ELECTRIC COMPONENTS

Release nut (2) for Dynamic Drive return line.

Tightening torque 37 14 21AZ. See 37 14 ELECTRIC COMPONENTS

Release nuts (3) for pressure lines to front axle oscillating motor.

Tightening torque 37 14 13AZ. See 37 14 ELECTRIC COMPONENTS

Fig 1: Identifying Bottom Right Wheel Arch Trim

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, position special tool 00 2 040 with a 2nd person helping on workshop jack 00 2 030 . See 00 2 030 UNIVERSAL HYDRO-LIFTER BASIC UNIT and 00 2 040 BASIC TAKE-UP FIXTURE

Insert special tools 31 4 011 and 31 4 012 into corresponding mountings of special tool 00 2 040 . See 00 2 040 BASIC TAKE-UP FIXTURE

Fig 2: Identifying Special Tool (31 4 011) & (31 4 012) (1 Of 2)

Courtesy of BMW OF NORTH AMERICA, INC.

WARNING:

Danger of injury!

Failure to comply with the following instructions may result in the vehicle slipping off the lifting platform and critically injuring other persons.

When supporting components, make sure that

the vehicle can no longer be raised or lowered
the vehicle does not lift off the locating plates on the lifting platform

Align special tool 00 2 040 to front axle carrier. See 00 2 040 BASIC TAKE-UP FIXTURE

NOTE: Make sure when raising that special tools 31 4 011 and 31 4 012 are correctly inserted in the front or rear recesses on the front axle carrier.

If necessary, lower special tool 33 3 274.

Support front axle carrier by raising special tool 00 2 040 . See 00 2 040 BASIC TAKE-UP FIXTURE

Fig 3: Locating Special Tool (31 4 011) & (31 4 012) (2 Of 2)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Pay attention to power steering hoses and lines when lowering and raising. Hoses/lines must not be kinked/tensioned/bent!

Release screws (1, 2).

Lower front axle carrier.

Installation:

Check threads for damage; if necessary, repair with Helicoil thread inserts. See 31 00... NOTES ON REPAIRING THREADS

Tighten down screws (1) and then screws (2).

Tightening torque 31 10 1AZ. See 31 10 FRONT AXLE SUSPENSION

Fig 4: Identifying Lower Front Axle Carrier & Screw

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Version with Dynamic Drive:
- Fill and bleed hydraulic system . See 32 13 006 BLEEDING POWER STEERING (VERSION WITH DYNAMIC DRIVE)
- Check pipe connections for leaks
Carry out steering angle sensor adjustment . See 61 31 996 CARRY OUT STEERING ANGLE SENSOR ADJUSTMENT
If necessary, carry out initial Dynamic Drive operation . See 37 10 001 INITIAL OPERATION WITH TEST RUN OF DYNAMIC DRIVE