Lexus GX470 2003-06

Shock Absorbers

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Support the axle with a jackstand.
  4.  
  5. Remove or disconnect the following:

    Rear wheel
     
    Shock absorber
     

  6.  

To install:

  1. Install or connect the following:

    Shock absorber. Tighten the nut to 51 ft. lbs. (69 Nm) and the bolt to 72 ft. lbs. (98 Nm).
     
    Rear wheel
     

  2.  


CAUTION
The vehicle ride height may change suddenly when relieving system pressure.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Support the rear axle with a jack or stands.
  4.  
  5. Relieve the Active Height Control (AHC) hydraulic pressure as follows:
    1. Connect a hose to the control actuator bleed screw and place the other end in a container.
    2.  
    3. Open the bleed screw.
    4.  
    5. When the fluid pressure has dropped and oil stops flowing, close the bleed screw.
    6.  

  6.  
  7. Remove or disconnect the following:

    Rear wheel
     
    Lower shock absorber mounting bolt
     
    AHC pressure hose
     
    Upper shock absorber mounting nut
     
    Shock absorber
     

  8.  

To install:

  1. Install or connect the following:

    Shock absorber. Tighten the upper nut to 51 ft. lbs. (68 Nm) and the lower bolt to 72 ft. lbs. (98 Nm).
     
    AHC pressure hose with new O-ring seals. Tighten the bolts to 13 ft. lbs. (18 Nm).
     
    Rear wheel
     

  2.  


NOTE
Do not let the AHC reservoir run empty during this procedure.

  1. Bleed the AHC system as follows:
    1. Fill the AHC system reservoir with AHC fluid 08886-01805.
    2.  
    3. Start the engine and pushN
    4.  
    5. When the AHC pump stops, turn the engineOFF
    6.  
    7. Open the bleed screw and allow any air in the system to escape.
    8.  
    9. Repeat until no air is expelled from the bleed screw.
    10.  
    11. Fill the AHC reservoir to the correct level.
    12.  

  2.  


    Click image to see an enlarged view

    Fig. Exploded view of the rear shock absorber mounting-LX470 with Active Height Control (AHC)


  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Support the axle with a jackstand.
  4.  
  5. Disconnect the actuator at the shock absorber.
    NOTE
    Don-t over-extend the pneumatic shock.

  6.  
  7. Remove the lower shock bolt.
  8.  
  9. Remove the upper nut and remove the shock.
  10.  
  11. Installation is the reverse of removal. Don-t fully tighten the lower bolt until the vehicle is on the ground and the suspension jounced a few times. Torque the upper nut to 18 ft. lbs. (25 Nm); the lower bolt to 72 ft. lbs. (98 Nm).
  12.  

 
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