Econoline E550 V8-7.3L DSL Turbo VIN F (2002)
Expansion Block/Orifice Tube: Description and Operation
NOTE: A new evaporator core orifice should be installed whenever a new A/C compressor is installed.
The evaporator core orifice has the following characteristics:
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It is located in the evaporator core inlet tube.
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It has filter screens located on the inlet and outlet ends of the tube body.
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The inlet filter screen acts as a strainer for the liquid refrigerant flowing through the A/C evaporator core orifice.
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O-ring seals on the evaporator core orifice prevent the high-pressure liquid refrigerant from bypassing the evaporator core orifice.
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Adjustment or service cannot be made to the evaporator core orifice assembly, a new evaporator core orifice assembly must be installed as a unit.
