Sierra Denali AWD V8-6.0L VIN N (2004)
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. Refer to Refrigerant Recovery and Recharging .
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. Lubricate the new O-ring using new 525 viscosity refrigerant oil.
3. Install the new O-ring seal.
4. Install the orifice tube (1) to the evaporator tube (2).
4.1.
Coat the O-ring seal with 525 viscosity refrigerant oil.
4.2.
Insert the short screen end of the new orifice (1) into the evaporator tube.
NOTE: Refer to Fastener Notice in Service Precautions.
5. Connect the evaporator tube at the fitting.
Tighten
Tighten the fitting to 25 N.m (18 lb ft).
6. Evacuate and recharge the system. Refer to Refrigerant Recovery and Recharging.
7. Leak test the fittings of the repaired component using J 39400-A.
