Expansion Block/Orifice Tube: Service and Repair

Expansion (Orifice) Tube Replacement

Special Tools
* J 26549-E Orifice Tube Remover
* J 39400-A Halogen Leak Detector

Removal Procedure

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging).
2. Remove the accumulator. Refer to Air Conditioning Accumulator Replacement (Service and Repair).
3. Remove the coolant reservoir. Refer to Coolant Recovery Reservoir Replacement (Coolant Recovery Reservoir Replacement).




4. Remove the evaporator tube nut (3) at the evaporator (1).
5. Remove the evaporator tube (4) from the evaporator (1).




6. Remove the O-ring seal and discard.
7. Remove the nut from the evaporator tube block fitting.
8. Separate the evaporator tubes (4, 6) at the block fitting.
9. Use the J 26549-E in order to remove the expansion tube.
10. Remove the expansion tube from the evaporator tube (6).

Installation Procedure





Note: Install the shorter screen end of the expansion tube into the evaporator tube (6) first.

1. Use the J 26549-E in order to install the expansion tube.
2. Install the new O-ring seal. Refer to O-Ring Replacement (O-Ring Replacement).
3. Assemble the evaporator tubes (4, 6).

Caution: Refer to Fastener Caution (Fastener Caution).

4. Install the evaporator tube nut and tighten to 28 Nm (21 ft. lbs.).




5. Connect the evaporator tube (4) to the evaporator (1).
6. Install the nut (3) and tighten to 28 Nm (21 ft. lbs.).
7. Install the coolant reservoir. Refer to Coolant Recovery Reservoir Replacement (Coolant Recovery Reservoir Replacement).
8. Install the accumulator. Refer to Air Conditioning Accumulator Replacement (Service and Repair).
9. Recharge the refrigerant system. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging).
10. Leak test the fittings of the components using the J 39400-A .