Avalanche 2500 4WD V8-8.1L VIN G (2003)
Expansion Block/Orifice Tube: Service and Repair
EXPANSION (ORIFICE) TUBE REPLACEMENT
TOOLS REQUIRED
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J 26549-E Orifice Tube Remover
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J 39400-A Halogen Leak Detector
REMOVAL PROCEDURE
1. Recover the refrigerant.
2. Loosen the nut from the evaporator tube fitting.
3. Use the J 26549-E in order to remove the orifice tube (1) from the evaporator tube (2).
4. Cap or plug the open line.
INSTALLATION PROCEDURE
1. Uncap or unplug the evaporator tube.
2. Install the new O-ring seal.
3. Install the short screen end of the new orifice (1) into the evaporator tube.
4. Connect the evaporator tube at the fitting.
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten
Tighten the fitting to 25 N.m (18 lb ft).
5. Evacuate and recharge the system.
6. Leak test the fittings of the repaired component using J 39400-A.