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Power Steering Gear: Disassembly

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  1. Remove power steering gear. See POWER STEERING GEAR .
  2. Remove tie rods.
  3. Remove leakage oil line. Remove pressure lines and remove O-rings from threaded bores or from lines. See Fig 1.
  4. Mark position of adjusting screw (1) relative to case with peening marks. Determine installation depth of adjusting screw (1) in case with a depth gauge and note down the result. Loosen adjusting screw (1). Remove spring (2), O-ring (3) and pressure piece (4). See Fig 2.
  5. Unscrew and remove screw cap. See Fig 3.
  6. Center steering gear by halving total number of turns. In this setting marks on steering spindle, cap and case all match. Add marks if necessary.
  7. Determine dimension (A) of rack with a depth gauge and note down result. This measurement is required for checking during installation. See Fig 4.
  8. Remove protective cap (1) from steering spindle. Unfasten nut. Brace against square nut on steering spindle. See Fig 5.
  9. Remove circlip. Withdraw steering spindle from case. See Fig 6.
  10. Remove bearing bush (1). See Fig 7.
  11. Drive radial shaft seal (2) and bearing (3) out of bearing bush (1) with special tool (32 1 140/250). See Fig 8.
  12. Remove connection for leakage oil line. See Fig 9.
  13. Insert retaining ring through bore in leakage oil line and remove from case. See Fig 10.
  14. Pull rack and bearing bush (1) out of pipe. See Fig 11.
  15. Drive radial shaft out of bearing bush (1) with special tool (32 1 140) and (33 3 331). See Fig 12.
  16. Drive radial shaft seal out of pipe with special tool (32 1 140/210). See Fig 13.
  17. Carefully drive bearing out of steering spindle housing with a punch. This improves access to radial shaft seal. See Fig 14.
  18. Carefully drive radial shaft seal (1) out of steering spindle housing with a punch. Do not damage polished cylinder bore. See Fig 15.
  19. Thoroughly clean all parts. Coat new seals with hydraulic fluid and fill radial shaft seals between edge and sealing lip with grease.
Fig 1: Locating Lines & O-Rings
G00177832Courtesy of BMW OF NORTH AMERICA, INC.
Fig 2: Removing Spring, O-Ring & Pressure Piece
G00177833Courtesy of BMW OF NORTH AMERICA, INC.
Fig 3: Removing Screw Cap
G00177834Courtesy of BMW OF NORTH AMERICA, INC.
Fig 4: Measuring Rack
G00177835Courtesy of BMW OF NORTH AMERICA, INC.
Fig 5: Removing Protective Cap From Steering Spindle
G00177836Courtesy of BMW OF NORTH AMERICA, INC.
Fig 6: Removing Circlip
G00177837Courtesy of BMW OF NORTH AMERICA, INC.
Fig 7: Removing Bearing Bush
G00177838Courtesy of BMW OF NORTH AMERICA, INC.
Fig 8: Driving Out Radial Shaft Seal & Bearing
G00177839Courtesy of BMW OF NORTH AMERICA, INC.
Fig 9: Removing Connection For Leakage Oil Line
G00177840Courtesy of BMW OF NORTH AMERICA, INC.
Fig 10: Inserting Retaining Ring
G00177841Courtesy of BMW OF NORTH AMERICA, INC.
Fig 11: Pulling Out Rack & Bearing Bush
G00177842Courtesy of BMW OF NORTH AMERICA, INC.
Fig 12: Driving Radial Shaft Seal Out Of Bush
G00177843Courtesy of BMW OF NORTH AMERICA, INC.
Fig 13: Driving Radial Shaft Seal Out Of Pipe
G00177844Courtesy of BMW OF NORTH AMERICA, INC.
Fig 14: Driving Bearing Out Of Steering Spindle Housing
G00177845Courtesy of BMW OF NORTH AMERICA, INC.
Fig 15: Driving Radial Shaft Seal Out Of Steering Spindle
G00177846Courtesy of BMW OF NORTH AMERICA, INC.
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