Section 12-03A: Air Conditioning System, Manual A/C-Heater
1996 F-150, F-250, F-350, F-Super Duty and Bronco, F-Super Duty Motorhome Chassis Workshop Manual
REMOVAL AND INSTALLATION

A/C Evaporator Core Orifice

The A/C evaporator core orifice (19D990) is constructed with a plastic body, two screens and a small brass tube down the center of the A/C evaporator core orifice. Two O-rings are around the A/C evaporator core orifice to seal against leakage.





SPECIAL SERVICE TOOL(S) REQUIRED
DescriptionTool Number
Spring Lock Coupling Disconnect
Tool Set		T84L-19623-B

 CAUTION: DO NOT attempt to remove the A/C evaporator core orifice with pliers or to twist or rotate the A/C evaporator core orifice in the tube. To do so will break the A/C evaporator core orifice in the tube. USE ONLY the recommended tool following the recommended service procedures.

Removal

  1. NOTE: Cap all open refrigerant lines and components to prevent entry of dirt and moisture into the A/C system.

    Discharge refrigerant from air conditioning system following recommended service procedures. Refer to Section 12-00. Observe all safety precautions.

  1. Disconnect condenser to evaporator tube (19835) from A/C evaporator core (19860) using Spring Lock Coupling Disconnect Tool Set T84L-19623-B. Cap condenser to evaporator tube to prevent entrance of dirt and excessive moisture.

  1. Pour a small amount of clean refrigerant oil into inlet tube to lubricate tube and O-rings during removal of A/C evaporator core orifice from tube.

  1. Engage the Fixed Orifice Tube Tool D80L-19990-A or equivalent with the two tangs on the A/C evaporator core orifice.

  1.  CAUTION: Do not twist or rotate the A/C evaporator core orifice in the tube as it may break off in the tube.

    Hold T-handle of Fixed Orifice Tube Tool D80L-19990-A or equivalent to keep it from turning and run nut on tool down against tube until A/C evaporator core orifice is pulled from tube.

  1. If A/C evaporator core orifice breaks in tube, it must be removed from tube with Broken Orifice Tube Extractor D80L-19990-B or equivalent.

  1. To remove a A/C evaporator core orifice, insert screw end of Broken Orifice Tube Extractor D80L-19990-B or equivalent into tube. Thread screw end of tool into brass tube in center of A/C evaporator core orifice. Pull A/C evaporator core orifice from tube.

  1. If only brass center tube is removed during above step, insert screw end of the Broken Orifice Tube Extractor D80L-19990-B or equivalent into tube and screw end of tool into A/C evaporator core orifice. Pull fixed A/C evaporator core orifice from tube.

Installation

  1. Lubricate O-rings on A/C evaporator core orifice liberally with clean refrigerant oil.

  1. Place A/C evaporator core orifice in Fixed Orifice Tube Tool D80L-19990-A or equivalent and insert A/C evaporator core orifice into tube until orifice is seated at stop.

  1. Remove Fixed Orifice Tube Tool D80L-19990-A or equivalent from A/C evaporator core orifice.

  1. Using a new O-ring lubricated with clean refrigerant oil, connect condenser to evaporator tube to tube.

  1. Leak test, evacuate and charge system following recommended service procedures. Refer to Section 12-00. Observe all safety precautions.

  1. Check system for proper operation.