GM: Electra/Park Avenue/Ninety-Eight 1990-1993

Fixed Orifice Tube

Print



Click image to see an enlarged view

Fig. Fig. 1 Cross-sectional view of the fixed orifice tube

REMOVAL & INSTALLATION



  1. Review the list under Useful Notes, above. Refer to the Air Bag section at the beginning of this Section, and disarm the Air Bag system.
  2.  
  3. Disconnect the negative battery cable. Properly discharge the air conditioning system.
  4.  
  5. Loosen the fitting at the liquid line outlet on the condenser and disconnect.
  6.  

Use a backup wrench on the condenser outlet fitting when loosening the lines.

  1. Discard the O-ring.
  2.  
  3. Carefully, remove the fixed orifice tube from the tube fitting in the evaporator inlet line.
  4.  
  5. In the event that the restricted or plugged orifice tube is difficult to remove, perform the following:
  6.  
    1. Remove as much of the impacted residue as possible.
    2.  
    3. Using a hair dryer, epoxy drier or equivalent, carefully apply heat approximately 1 / 4 inch from the dimples on the inlet pipe. Do not overheat the pipe.
    4.  
    5. While applying heat, use special tool J 26549-C or equivalent to grip the orifice tube. Use a turning motion along with a push-pull motion to loosen the impacted orifice tube and remove it.
    6.  

  7. Swab the inside of the evaporator inlet pipe with refrigerant oil to remove any remaining residue.
  8.  

To install:

  1. Lubricate the new O-ring and orifice tube with refrigerant oil and insert into the inlet pipe.
  2.  

Ensure that the new orifice tube is inserted in the inlet tube with the smaller screen end first.

  1. Connect the evaporator inlet pipe with the condenser outlet fitting.
  2.  

Use a backup wrench on the condenser outlet fitting when tightening the lines.

  1. Evacuate, recharge and leak test the system. Add 1 oz. of refrigerant oil to the system during the recharge.
  2.  

 
label.common.footer.alt.autozoneLogo