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Home › Lexus › 2005 › LX 470 › Repair and Diagnosis › Heating, Ventilation & A/C (HVAC) › HVAC Control Systems › Air Conditioning › Front Cooling Unit › Disassembly

Front Cooling Unit: Disassembly

  1. REMOVE EVAPORATOR 
    1. Disconnect the connector clamp.
    2. Remove the 8 screws and No. 1 cooler cover.
    3. Pull out the evaporator
      Fig 1: Removing Evaporator
      G02987209Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      At the time of reassembly, if evaporator is replaced, add compressor oil to the evaporator.

      Add: 40cc (1.4 fl.oz.) 

      Compressor oil: ND-OIL 8 or equivalent 

    4. Pull out the air refiner filter.
  2. PULL OUT EVAPORATOR TEMPERATURE SENSOR FROM EVAPORATOR 
    Fig 2: Removing Evaporator Temperature Sensor From Evaporator
    G02987210Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. REMOVE EXPANSION VALVE 
    1. Remove the grommet.
    2. Pry out the packing.
      Fig 3: Removing Expansion Valve
      G02987211Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      At the time of reassembly, do not reuse the packing.

    3. Using a hexagon wrench (5.0 mm, 0.20 in.), remove the 2 bolts and separate the expansion valve, tube and evaporator.

      Torque: 3.4 N.m (35 kgf.cm, 30 in.lbf) 

    NOTE: Cap the open fittings immediately to keep moisture or dirt out of the system.

    HINT:

    At the time of reassembly, lubricate 4 new O-rings with compressor oil and install them in the tube.

  4. REMOVE DRAIN HOSE 
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