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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating, Ventilation And Air Conditioning >> Repair Instructions >> Expansion (Orifice) Tube Replacement >> Removal Procedure

Removal Procedure

  1. Remove the air cleaner. Refer to AIR CLEANER ASSEMBLY in Removal & Installation.
  2. Recover the refrigerant from the system. Refer to REFRIGERANT RECOVERY AND RECHARGING .
  3. Remove the evaporator tube from the evaporator.
  4. Remove the O-ring seal.
  5. Use the J 26549-E  in order to remove the orifice tube.
    Fig 1: Removing Expansion (Orifice) Tube
    G01645577Courtesy of GENERAL MOTORS CORP.
  6. If you have difficulty removing a restricted or plugged expansion (orifice) tube, use the following procedure:
    1. 6.1. Remove as much of any impacted residue as possible.
      NOTE: If the system has a pressure switch near the expansion (orifice) tube location, it should be removed prior to heating the pipe to avoid damage to switch.
    2. 6.2. Carefully apply heat with a heat gun (hair dryer, epoxy dryer, or equivalent) approximately 7 mm (0.25 in) from the dimples on the inlet pipe. DO NOT overheat the pipe.
    3. 6.3. While applying heat, use the J 26549-E  in order to remove the orifice tube.
    4. 6.4. Use a turning motion along with a push-pull motion in order to loosen the impacted expansion (orifice) tube.
    5. 6.5. Remove the expansion (orifice) tube.
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