Expansion Valve: Service and Repair

Thermal Expansion Valve Replacement

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

1. Remove the I/P Retainer.




2. Remove the insulation (1) from the TXV.




3. Remove the HVAC line clamp screw.




4. Remove the HVAC line clamp.




5. Remove the TXV to evaporator bolts (1).




6. Remove the TXV line bracket.




7. Remove the TXV from the evaporator core.
8. Separate the TXV from the A/C lines by pulling straight out.
9. Remove the TXV.

Installation Procedure

1. Lubricate the O-rings. Refer to O-Ring Replacement.
2. Install the A/C lines into the TXV.




3. Carefully slide the TXV onto the evaporator core until seated.




4. Install the TXV line bracket.






Notice: Refer to Fastener Notice.

5. Install the TXV to evaporator bolts (1).

Tighten the bolts to 3.5 N.m (31 lb in).




6. Install the HVAC line clamp.




7. Install the HVAC line clamp screw.

Tighten the screw to 1 N.m (8 lb in).




8. Install the insulation (1) onto the lines and TXV.
9. Install the I/P Retainer.