32 13 065 Removing And Installing/Replacing Active Front Steering Power Steering Gear
Mount securing fixture for vehicle on lifting platform to prevent the vehicle from slipping off or tilting down. See 51 71 505 MOUNT SECURING FIXTURE FOR VEHICLE ON LIFTING PLATFORM .
Secure engine in installation position to prevent it from falling down. See 11 00 670 SECURING ENGINE IN INSTALLATION POSITION (N52) .
Risk of injury if oil comes into contact with eyes and skin!
Close off pipe connections with plugs.
Necessary preliminary tasks:
- Draw off and dispose of hydraulic fluid from fluid reservoir
- Remove tie rod end on both sides from swivel bearing . See 32 21 151 REPLACING LEFT OR RIGHT TIE ROD .
- Replacement only: Remove tie rod end at both ends of tie rod . See 32 21 151 REPLACING LEFT OR RIGHT TIE ROD .
- Remove lower section of steering spindle from steering gear.
- Lower front axle support . See 31 11 506 LOWERING/RAISING FRONT AXLE CARRIER (SPECIAL TOOL SWZ00-2040) or 31 11 506 LOWERING/RAISING FRONT AXLE CARRIER (UNIVERSAL LIFTER) .
- Disconnect plug connection for ECO valve on back of power steering pump
Carefully lower power steering gear.
Mark installation positions of pressure and return lines to power steering gear.
Release banjo bolts (1).
Disconnect pressure line (2) and return line (3) from power steering gear.
Installation:
Replace all sealing rings.
Align pressure and return lines by way of markings and tighten down banjo bolts.
Tightening torque 32 41 5AZ (pressure line).
See STEERING AND WHEEL ALIGNMENT - TIGHTENING TORQUES .
Tightening torque 32 41 6AZ (return line).
See STEERING AND WHEEL ALIGNMENT - TIGHTENING TORQUES .
Release power steering gear and remove sideways between engine and front axle carriers.
Replacement:
If necessary, release screws (1) and remove heat shield (2).
Disconnect plug connections (3) and remove connecting cable (4).
Installation:
Tightening torque 32 00 2AZ.
See STEERING AND WHEEL ALIGNMENT - TIGHTENING TORQUES .
After installation:
- Fill and bleed hydraulic system . See 32 13 006 BLEEDING POWER STEERING (VERSION WITH DYNAMIC DRIVE) or 32 13 006 BLEEDING POWER STEERING UNIT .
- Check pipe connections for leaks
- Perform CHASSIS ALIGNMENT CHECK
- Perform adjustment for active steering . See 32 10 005 ADJUSTMENT FOR ACTIVE FRONT STEERING and 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 .