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Expansion Valve: Service and Repair
Removal
1. Remove the cover above the heating/air-conditioning system.
2. Remove the refrigerant by suction using the service unit.
3. Detach the air-conditioning lines at the expansion valve. Immediately close connections and lines with plugs so that they are air-tight.
4. Undo the expansion valve and remove it. Immediately close the lines to the evaporator with plugs so that they are air-tight.
Installation
1. Do not remove plugs until shortly before installation. Replace O-rings and wet the new rings with refrigerant oil.
2. Refrigerant oil removed from a previously run air-conditioning system may no longer be used (special-category waste).
Tightening torques:
Screw M5
6 Nm (4.5 ftlb)
Screw M6
9 Nm (6.5 ftlb)
This is a source reference. Confirm exact model applicability in the original material.