Lexus RX300, 330 3 2000-06

Removal & Installation

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CAUTION
Refer to the applicable precautions for this system before performing the following operation. Failure to follow the warnings and cautions could result in possible personal injury or death.

  1. Discharge the A/C refrigerant, as outlined earlier in this section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the v (cooler compressor to crankshaft pulley) belt, as outlined in the Engine Mechanical Section.
  6.  
  7. Separate the cooler refrigerant suction hose, as follows:
    1. Remove the bolt and disconnect the cooler refrigerant suction hose.
    2.  
    3. Remove the O-ring from the cooler refrigerant suction hose.
      NOTE
      Seal the opening of the disconnected parts using vinyl tape to prevent moisture and foreign matter from entering the lines and ports while they are disconnected.



      Click image to see an enlarged view

      Fig. Disconnect the suction hose

    4.  

  8.  
  9. Separate the cooler refrigerant discharge hose, as follows:
    1. Remove the nut and disconnect the cooler refrigerant discharge hose.
    2.  
    3. Remove the O-ring from the cooler refrigerant discharge hose,
      NOTE
      Seal the opening of the disconnected parts using vinyl tape to prevent moisture and foreign matter from entering the lines and ports while they are disconnected.



      Click image to see an enlarged view

      Fig. Disconnect the discharge hose

    4.  

  10.  
  11. Remove engine under cover.
  12.  
  13. Remove compressor and magnetic clutch assembly, as follows:
    1. Disconnect the connector and clamp.
    2.  
    3. Remove the 2 bolts, nut and cooler compressor bracket.
    4.  
    5. Remove the 3 bolts and compressor and magnetic clutch assembly.

      Click image to see an enlarged view

      Fig. Remove the 2 bolts, nut and cooler compressor bracket

    6.  

  14.  
  15. Check the compressor oil, as follows:
    1. When replacing the compressor and magnetic clutch with new one, after gradually removing the refrigerant gas from the service valve, drain the following amount of oil from the new compressor and magnetic clutch before installation. Standard: (oil capacity inside new cooler compressor assembly: 120 - 135 ml.) - (remaining oil amount in the Removed cooler compressor assembly) = (oil amount to be removed when replacing)
      NOTE
      When checking the compressor oil level, observe the precautions on the cooler removal/installation. Because compressor oil remains in the pipes of the vehicle, if a new cooler compressor is installed without removing some oil inside, the oil amount becomes too much, preventing heat exchange in the refrigerant cycle and causing refrigerant failure. If the remaining oil in the removed cooler compressor assembly is too small in volume, check for oil leakage. Be sure to use ND_OIL8 compressor oil.

    2.  

  16.  

To install:

  1. Install the compressor and magnetic clutch assembly:
    1. Install the compressor and magnetic clutch and 3 bolts. Tighten to 18 ft. lbs. (25 Nm).
    2.  
    3. Install the cooler compressor bracket, 2 bolts and nut.
    4.  
    5. Install the connector and clamp.
    6.  

  2.  
  3. Install the discharge hose, as follows:
    1. Remove the attached vinyl tape from the hose.
    2.  
    3. Install a new O-ring to the cooler refrigerant discharge hose.
    4.  
    5. Apply clean ND-OIL8 or equivalent compressor oil to the O-ring and fit surface f the compressor and magnetic clutch.
    6.  
    7. Install the cooler refrigerant discharge hose to the compressor and magnetic clutch with the nut. Tighten to 87 inch lbs. (9.8 Nm).
    8.  

  4.  
  5. Install the suction hose, as follows:
    1. Remove the attached vinyl tape from the hose.
    2.  
    3. Install a new O-ring to the cooler refrigerant suction hose.
    4.  
    5. Apply clean ND-OIL8 or equivalent compressor oil to the O-ring and fit surface f the compressor and magnetic clutch.
    6.  
    7. Install the cooler refrigerant suction hose to the compressor and magnetic clutch with the bolt and tighten to 87 inch lbs. (9.8 Nm).
    8.  

  6.  
  7. Install and adjust the compressor to crankshaft pulley belt, as outlined in the Engine Mechanical Section. Fully tighten the belt.
  8.  
  9. Connect the negative battery cable.
  10.  
  11. Charge refrigerant, as outlined earlier in this section.
  12.  
  13. Start and warm up the engine
  14.  
  15. Leak test the refrigerant, as outlined in this section.
  16.  

 
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