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Power Steering Gear: Assembly

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  1. Replace O-ring (1). Insert plastic bush (2) and thrust shim (3) in bearing sleeve. Insert radial shaft seal (4). See Fig 1.
  2. Drive new radial shaft seal (4) firmly home in bearing bush. The open side should be facing special tool (32 1 140/220). See Fig 2.
  3. Insert plastic bush (1) and thrust shim (2) in pipe. Drive new radial shaft seal (3) firmly home in pipe. The open side should be facing special tool (32 1 140/220). See Fig 3.
  4. Grease bearings (refer to OPERATING FLUIDS ) and drive firmly home in steering spindle housing with special tool (32 1 140/120). See Fig 4.
  5. Drive new radial shaft seal firmly home in steering spindle housing. The open side should be facing special tool (32 1 140/230). See Fig 5.
  6. Replace O-ring (1) and piston ring (2). See Fig 6.
  7. Carefully insert rack in pipe to avoid damage to the internal radial shaft seal by the spline and the piston race (2). Fit bearing bush to rack and slide into pipe. See Fig 7.
  8. Fit circlip with open side opposite to leakage oil bore. See Fig 8.
  9. Replace piston rings (1) and O-rings (2) beneath them. See Fig 9.
  10. Insert new radial shaft seal (3), open side upwards, in bearing bush (1) and drive firmly home with special tool (32 1 140/240/250. Replace O-ring (2). See Fig 10.
  11. Drive bearing (2) firmly home, lettering upwards, into bearing bush (1) with special tool (32 1 140/240/250). See Fig 11.
  12. Slide bearing bush (1), radial shaft seal outermost, onto the steering spindle. See Figure.
  13. Grease rack and pinion (refer to OPERATING FLUIDS ). Pull out rack to recorded dimension (A). Carefully insert steering spindle into case and install retaining ring. Check that marks are aligned. See Fig 12.
  14. Push on protective cap in this position, whereby marking of housing, steering spindle and protective cap must align. See Fig 13.
  15. Replace self-locking nut. See Figure. Tighten to specification. See TORQUE SPECIFICATIONS .
  16. Install screw cap. See Figure. Tighten to specification. See TORQUE SPECIFICATIONS . Secure by peening.
  17. Insert foil insert (1) and replace O-ring (2). See Fig 14.
    18. CAUTION: The rack must be able to move freely over the entire range of travel.
  18. Grease and install pressure piece (4), spring (2) and O-ring (3). Tighten adjusting screw (1) down to determine screw-in depth and align all the marks. Secure adjusting screw by peening. See Figure.

    Grease: refer to OPERATING FLUIDS .

  19. Fit connections for leakage oil line. Fit leakage oil line and attach pressure lines with new O-rings. See Fig 15. Tighten to specification. See TORQUE SPECIFICATIONS .
  20. Install tie rods. See appropriate FRONT article in SUSPENSION.
  21. Install power steering gear. See POWER STEERING GEAR  under REMOVAL & INSTALLATION.
Fig 1: Installing Components In Bearing Sleeve
G00177847Courtesy of BMW OF NORTH AMERICA, INC.
Fig 2: Driving In Radial Shaft Seal
G00177848Courtesy of BMW OF NORTH AMERICA, INC.
Fig 3: Inserting Plastic Bush In Pipe
G00177849Courtesy of BMW OF NORTH AMERICA, INC.
Fig 4: Installing Bearings
G00177850Courtesy of BMW OF NORTH AMERICA, INC.
Fig 5: Installing Radial Shaft Seal In Steering Spindle Housing
G00177851Courtesy of BMW OF NORTH AMERICA, INC.
Fig 6: Replacing O-Ring & Piston Ring
G00177852Courtesy of BMW OF NORTH AMERICA, INC.
Fig 7: Inserting Rack In Pipe
G00177853Courtesy of BMW OF NORTH AMERICA, INC.
Fig 8: Fitting Circlip
G00177854Courtesy of BMW OF NORTH AMERICA, INC.
Fig 9: Replacing Piston Rings & O-Rings
G00177855Courtesy of BMW OF NORTH AMERICA, INC.
Fig 10: Inserting Radial Shaft Seal In Bearing Bush
G00177856Courtesy of BMW OF NORTH AMERICA, INC.
Fig 11: Driving Bearing Into Bearing Bush
G00177857Courtesy of BMW OF NORTH AMERICA, INC.
Fig 12: Inserting Spindle Into Case
G00177858Courtesy of BMW OF NORTH AMERICA, INC.
Fig 13: Installing Protective Cap
G00177859Courtesy of BMW OF NORTH AMERICA, INC.
Fig 14: Inserting Foil Insert & O-Ring
G00177860Courtesy of BMW OF NORTH AMERICA, INC.
Fig 15: Installing Leakage Oil Lines & Pressure Lines
G00177861Courtesy of BMW OF NORTH AMERICA, INC.
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