Expansion Block/Orifice Tube: Service and Repair

Expansion (Orifice) Tube Replacement

Tools Required

* J 26549-E Orifice Tube Remover and Installer
* J 39400-A Halogen Leak Detector

Removal Procedure

1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging.
2. Remove the evaporator hose retaining nut from the evaporator.
3. Use the J 26549-E in order to remove the expansion tube (1).
4. If the expansion tube is stuck perform the following:

* Remove as much of the impacted residue as possible.
* Carefully apply heat with a heat gun, or hair dryer 7 mm (0.25 in) from the dimples on the inlet pipe.
DO NOT overheat the pipe.
* While applying heat, use the J 26549-E in order to grip the expansion tube. Use a turning motion along with a push-pull motion to loosen the impacted expansion tube and remove.

Installation Procedure






Important:
* Install the shorter screen end (3) first into the evaporator.

* Coat the O-ring seal (2) with 525 viscosity refrigerant oil.

Use the J 26549-E in order to install the expansion tube.

2. Install new sealing washers to the evaporator tube.
3. Install the evaporator hose to the evaporator.

Notice: Refer to Fastener Notice.

4. Install the evaporator hose retaining nut to the evaporator.

Tighten the nut to 16 N.m (12 lb ft).

5. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
6. Leak test the fittings of the components using the J 39400-A.