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Home >> Infiniti >> 2009 >> M45 Base >> Repair and Diagnosis >> Steering >> Power Steering System >> Service Information >> Power Steering Gear And Linkage >> Disassembly and Assembly >> Assembly

Disassembly and Assembly: Assembly

  1. Apply recommended fluid to rack Teflon ring.
  2. Heat rack Teflon ring to approximately 40°C (104°F) with a dryer. Assemble it to mounting groove of rack assembly.
    CAUTION: Never reuse rack Teflon ring.
    Fig 1: Heating Rack Teflon Ring Using Dryer
    G04876895Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Install the Teflon ring correcting tool [SST: KV48104400 (-)] from tooth side of rack to fit rack Teflon ring on rack. Compress the ring with tool.
    Fig 2: Identifying Rack Teflon Ring
    G04876896Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Apply recommended grease to rack oil seal, and then install rack oil seal in the following procedure. Then assemble rack assembly to gear housing assembly.
    CAUTION:
    • Install rack oil seal in a direction so that the lip of inner oil seal and the lip of outer oil seal face each other.
    • Never damage retainer sliding surface by rack assembly. Replace gear housing assembly if damaged.
    • Never damage gear housing assembly inner wall by rack assembly. Gear housing assembly must be replaced if damaged because it may cause fluid leakage.
      Fig 3: Identifying Inner And Outer Rack Oil Seal Locations
      G04876897Courtesy of NISSAN MOTOR CO., U.S.A.
    1. Wrap an OHP sheet [approximately 70 mm (2.76 in) x 100 mm (3.94 in)]. Around rack assembly teeth to avoid damaging rack oil seal (inner). Install rack oil seal over sheet. Then, pull OHP sheet along with rack oil seal until they pass rack assembly teeth, and remove OHP sheet.
      Fig 4: Identifying Inner Rack Oil Seal
      G04876898Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Insert rack oil seal (inner) into rack assembly piston (rack Teflon ring).
    3. Push retainer to adjusting screw side by hand, and move the rack assembly inside the gear housing assembly so that the rack oil seal (inner) can be pressed against the gear housing assembly.
      Fig 5: Inserting Rack Oil Seal Into Rack Assembly Piston
      G04921831Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Wrap an OHP sheet [approximately 70 mm (2.76 in) x 100 mm (3.94 in)]. Around the edge to avoid damaging rack oil seal (outer). Install rack oil seal over sheet. Then, pull oil seal along with OHP sheet until they pass rack edge, and remove OHP sheet.
    5. Install end cover assembly to rack edge, and move rack oil seal (outer) until it contacts with gear housing assembly.
      Fig 6: Identifying End Cover Assembly
      G04876900Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Tighten end cover assembly to specified torque using a 36 mm (1.42 in) open head (suitable tool).
    CAUTION: Never damage rack assembly. Replace it if damaged because it may cause fluid leakage.
    Fig 7: Holding Rack Pinion Assembly
    G04876889Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Crimp gear housing assembly at one point using a punch as shown in the figure so as to prevent end cover assembly from getting loose after tightening end cover assembly.
  7. Apply recommended fluid to O-ring, and then install O-ring to gear housing assembly.
  8. Install gear-sub assembly to gear housing assembly.
  9. Install power steering solenoid valve to gear-sub assembly.
    Fig 8: Identifying Gear Housing Assembly Crimping Position
    G04921834Courtesy of NISSAN MOTOR CO., U.S.A.
  10. Install inner socket to gear housing assembly with the following procedure.
    1. Install spacer to gear housing assembly.
    2. Apply thread sealant into the thread of inner socket.

      Use Genuine Medium Strength Thread Locking Sealant or equivalent. Refer to  "RECOMMENDED CHEMICAL PRODUCT AND SEALANT ".

  11. Screw inner socket into rack part and tighten at the specified torque.
  12. Decide on the neutral position for the rack.

    Standard 

    Rack stroke "L" : Refer to  "STEERING GEAR ".

  13. Install rear cover cap to gear sub-assembly.
    CAUTION: Make sure that the projection of rear cover cap is aligned with the marking position of gear housing assembly.
    Fig 9: Identifying Neutral Position Of Rack Stroke
    G05224421Courtesy of NISSAN MOTOR CO., U.S.A.
  14. Apply recommended thread sealant to the thread (2 turns thread), and then screw in the adjusting screw until it reaches height "H" from gear housing assembly measured before disassembling.

    Use Genuine High Performance Thread Sealant or equivalent. Refer to  "RECOMMENDED CHEMICAL PRODUCT AND SEALANT ".

  15. Move rack assembly 10 strokes throughout the full stroke so that the parts can fit with each other.
    Fig 10: Measuring Adjusting Screw Height
    G04921817Courtesy of NISSAN MOTOR CO., U.S.A.
  16. Measure pinion rotating torque within ±180° of neutral position of the rack assembly using the preload gauge [SST] and preload adapter [SST]. Stop the gear at the point where highest torque is read.
  17. Loosen adjusting screw and retighten to 5.4 N.m (0.55 kg-m, 48 in-lb), and then loosen by 20 to 40°.
    Fig 11: Measuring Pinion Rotating Torque
    G05211922Courtesy of NISSAN MOTOR CO., U.S.A.
  18. Measure pinion rotating torque using the preload adapter [SST] and preload gauge [SST] to make sure that the measured value is within the standard. Readjust if the value is outside the standard. Replace steering gear assembly if the value is outside the standard after readjusting or adjusting screw rotating torque is 5 N.m (0.51 kg-m, 44 in-lb) or less.
    Fig 12: Pinion Rotating Torque Graph
    G05224424Courtesy of NISSAN MOTOR CO., U.S.A.
    TORQUE SPECIFICATION

    Pinion rotating torque standard 2WD AWD
    Around neutral position (within ±100°) Average A 1.38 - 1.83 N.m (0.14 - 0.18 kg-m, 13 - 16 in-lb) 1.61 - 2.16 N.m (0.17 - 0.22 kg-m, 15 - 19 in-lb)
    Maximum variation B 0.98 N.m (0.10 kg-m, 9.0 in-lb)
  19. Apply recommended liquid gasket to inner socket and turn pinion fully to left with inner socket installed to gear housing assembly.
  20. Set dial gauge as shown in the figure. Measure vertical movement of rack assembly when pinion is turned clockwise with torque of 19.6 N.m (2.0 kg-m, 14 ft-lb). Readjust adjusting screw angle if the measured value is outside the standard. Replace steering gear assembly if the measured value is still outside the standard or adjusting screw rotating torque is 5 N.m (0.51 kg-m, 44 in-lb) or less.
    Fig 13: Measuring Vertical Movement Of Rack Assembly
    G05211924Courtesy of NISSAN MOTOR CO., U.S.A.
    RACK AXIAL REFERENCE

    Measuring point Rack axial direction 5 mm (0.20 in) from housing end surface
    Rack radial direction Axial direction of the adjusting screw
    Vertical movement of rack 0.265 mm (0.0104 in)
  21. Install large end of boot to gear housing assembly.
  22. Install small end of boot to inner socket boot mounting groove.
  23. Install boot clamp to boot small end.
    Fig 14: Identifying Boot Clamp (Large And Small Side)
    G04921841Courtesy of NISSAN MOTOR CO., U.S.A.
  24. Install large side of boot clamp.
    CAUTION: Never reuse boot clamp.
    • Tighten large side of boot with boot clamp (stainless wire).

      Wire length "L" : 370 mm (14.57 in) 

    • Wrap clamp around boot groove for two turns. Insert a flat-bladed screwdriver in loops on both ends of wire. Twist 4 to 4.5 turns while pulling them with force of approximately 98 N (10 kg, 22 lb).
      Fig 15: Identifying Dimension Of Boot Clamp
      G04876910Courtesy of NISSAN MOTOR CO., U.S.A.
    • Twist boot clamp as shown. Pay attention to relationship between winding and twisting directions.
      Fig 16: Identifying Boot Clamp Winding And Twisting Directions
      G04876911Courtesy of NISSAN MOTOR CO., U.S.A.
    • Twisted point of clamp is in the opposite side of adjusting screw (1) as shown in the figure (to prevent contact with other parts).
      Fig 17: Twisting Point Of Clamp
      G05211928Courtesy of NISSAN MOTOR CO., U.S.A.
    • Bent cut end of the wire toward rack axial as shown in the figure after twisting the wire 4 to 4.5 turns so that cut end does not contact with boot.
      CAUTION: Keep gap from cylinder tube 5 mm (0.20 in) or more.
  25. Install cylinder tubes to gear housing assembly.
    Fig 18: Identifying Cut Wire Bent Position
    G05211929Courtesy of NISSAN MOTOR CO., U.S.A.
  26. Adjust inner socket to standard length L, and then tighten lock nut to the specified torque. Refer to "COMPONENTS ". Check length of inner socket L again after tightening lock nut. Make sure that the length is the standard.

    Standard 

    Inner socket length "L" : Refer to  "STEERING GEAR ".

    CAUTION: Adjust toe-in after this procedure. Length achieved after toe-in adjustment is not necessary the above value.
    Fig 19: Adjusting Inner Socket To Standard Length L
    G04876915Courtesy of NISSAN MOTOR CO., U.S.A.
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