Ford Pick-ups and Broncos 1987-1996 Repair Guide

Fixed Orifice Tube

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REPLACEMENT



See Figure 1

Do not attempt to remove the tube with pliers or to twist or rotate the tube in the evaporator. To do so will break the tube in the evaporator core. Use only the tools recommended in the procedure.

  1. Discharge the refrigerant system using a certified recycling/recovery station (refer to Routine Maintenance ).
  2.  
  3. Using back-up wrenches (1987-88) or a quick-disconnect coupling tool (1989-96), disconnect the liquid line. Cap all openings at once!
  4.  



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Fig. Fig. 1: Fixed orifice tube removal

  1. Pour a small amount of clean refrigerant oil into the core inlet tube to ease removal.
  2.  
  3. Using remover tool T83L-19990-A, engage the 2 tangs on the orifice tube. DO NOT TWIST OR ROTATE THE TUBE!
  4.  
  5. Tighten the nut on the tool until the orifice tube is withdrawn from the core.
  6.  
  7. If the orifice tube breaks in the core, it must be extracted using tool T-83L-1990-B. Thread the end of the tool into the brass tube end of the orifice tube. Pull the orifice tube from the core. If only the brass tube comes out, thread the tool back into the orifice body and pull that out.
  8.  

To install:
  1. Coat the new O-rings with clean refrigerant oil. Place the O-rings on the new orifice tube.
  2.  
  3. Place the new orifice tube onto tool T83L-1990-A and insert it into the core until it is seated at its stop. Remove the tool.
  4.  
  5. Using a new O-ring coated with clean refrigerant oil, connect the liquid line.
    1. On 1987-88 models, use a back-up wrench and tighten the connection to 20 ft. lbs. (27 Nm).
    2.  
    3. On 1989-96 models, push the coupling firmly together until is snaps securely. Test the coupling by trying to pull it apart.
    4.  

  6.  
  7. Evacuate, charge and leak test the system (refer to Routine Maintenance ).
  8.  

 
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