B3000 SE Regular Cab 4WD V6-3.0L OHV (1998)
Expansion Block/Orifice Tube: Description and Operation
NOTE:
- The A/C evaporator core orifice should be replaced whenever an A/C compressor is replaced.
The A/C evaporator core orifice has the following characteristics:
- Color-coded red
- Has an orifice diameter of 1.6 mm (0.062 inch)
- Is located in the A/C evaporator core inlet tube
- Has filter screens located on the inlet and outlet ends of the tube body
- The inlet filter screen acts as a strainer for the liquid refrigerant flowing through the A/C evaporator core orifice.
- O-rings on the A/C evaporator core orifice prevent the high-pressure liquid refrigerant from by-passing the A/C evaporator core orifice.
- Adjustment or service cannot be made to the A/C evaporator core orifice assembly. It must be replaced as a unit.
