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Home >> Lexus >> 2019 >> RX 450h Base >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning System (Service Information) (2 Of 2) >> Compressor >> Installation [03/2018 - 08/2019] >> Procedure

Installation [03/2018 - 08/2019]: Procedure

  1. INSPECT COMPRESSOR OIL 
    1. When replacing the compressor with motor assembly with a new one, gradually discharge the inert gas from the service valve, and drain the following amount of oil from the new compressor with motor assembly before installation.
      GTY681982Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (w/o Rear Air Conditioning System)

      (Oil capacity inside the new compressor with motor assembly: 120 to 135 cc (4.1 to 4.5 fl. oz)) - (Remaining oil amount in the removed compressor with motor assembly) = (Oil amount to be removed from the new compressor)

      Standard (w/ Rear Air Conditioning System)

      (Oil capacity inside the new compressor with motor assembly: 225 to 240 cc (7.61 to 8.11 fl. oz)) - (Remaining oil amount in the removed compressor with motor assembly) = (Oil amount to be removed from the new compressor)

      NOTE:
      • If a new compressor with motor assembly is installed without removing some oil, there will be too much oil in the system due to the oil remaining in the pipes of the vehicle. Excessive oil in the system prevents heat exchange in the refrigeration cycle and causes ineffective cooling.
      • If the amount of oil remaining in the old compressor with motor assembly is too small, check the air conditioning system for oil leaks.
      • Be sure to use ND-OIL 11 or equivalent compressor oil. If any compressor oil other than ND-OIL 11 is used, compressor with motor assembly insulation performance may decrease, resulting in leakage of electric power.
  2. INSTALL COMPRESSOR WITH MOTOR ASSEMBLY 
    1. Install the compressor with motor assembly and bracket with the 3 bolts.

      Torque: 24.5 N*m (250 kgf*cm, 18 ft.*lbf) 

      GTY616760Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Bracket

      HINT: 

      Tighten the 3 bolts in the order shown in the illustration.

    2. Connect the connector (B).
      GTY638376Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Connector (A)
      *b Connector (B)
      *c Green-colored Lock
    3. Connect the connector (A) and slide the green-colored lock as shown in the illustration to lock it securely.
      WARNING:

      Make sure to wear insulating gloves.

      NOTE:

      Make sure that the connector is connected securely.

    4. Engage the 3 clamps.
    5. Connect the connector.
    6. Connect the bracket with the bolt.

      Torque: 8.35 N*m (85 kgf*cm, 74 in.*lbf) 

  3. CONNECT SUCTION HOSE SUB-ASSEMBLY 
    1. Remove the vinyl tape from the suction hose sub-assembly.
    2. Sufficiently apply compressor oil to a new O-ring and the fitting surface of the compressor with motor assembly.

      Compressor Oil

      ND-OIL 11 or equivalent

    3. Install the O-ring to the suction hose sub-assembly.
      NOTE:
      • Keep the O-ring and O-ring fitting surface free of foreign matter.
      • Do not use any compressor oil other than ND-OIL 11 or equivalent. If any compressor oil other than ND-OIL 11 or equivalent is used, compressor motor insulation performance may decrease, resulting in leakage of electric power.
    4. Connect the suction hose sub-assembly to the compressor with motor assembly with the bolt.

      Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf) 

  4. CONNECT DISCHARGE HOSE SUB-ASSEMBLY 
    1. Remove the vinyl tape from the discharge hose sub-assembly.
    2. Sufficiently apply compressor oil to a new O-ring and the fitting surface of the compressor with motor assembly.

      Compressor Oil

      ND-OIL 11 or equivalent

    3. Install the O-ring to the discharge hose sub-assembly.
      NOTE:
      • Keep the O-ring and O-ring fitting surface free of foreign matter.
      • Do not use any compressor oil other than ND-OIL 11 or equivalent. If any compressor oil other than ND-OIL 11 or equivalent is used, compressor motor insulation performance may decrease, resulting in leakage of electric power.
    4. Connect the discharge hose sub-assembly to the compressor with motor assembly with the bolt.

      Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf) 

  5. INSTALL RADIATOR ASSEMBLY 

    Refer to INSTALLATION [10/2015 - ]

  6. INSTALL SERVICE PLUG GRIP 

    Refer to INSTALLATION [03/2018 - ]

  7. CHARGE AIR CONDITIONING SYSTEM WITH REFRIGERANT 

    Refer to PROCEDURE - Step 2

  8. WARM UP COMPRESSOR 

    Refer to PROCEDURE - Step 3

  9. INSPECT FOR REFRIGERANT LEAK 

    Refer to PROCEDURE - Step 4