Expansion Valve

Expansion Valve

Special tools, testers and auxiliary items required

• A/C Service Unit (ROB 134APF)

• Refrigerant must be extracted before hand using, for example (ROB 134APF).

• The previously used service stations can still be used. Refer to the Volkswagen workshop equipment catalog.

• To prevent the entry of dampness all components of the refrigerant circuit which have been opened must be sealed with suitable plugs.

Removing

Only for vehicles with a heat shield in front of the expansion valve

- Remove the nut - 1 - (4.5 Nm) and bolt - 4 - (2.5 Nm).






- Remove the clip - 2 - and the heat shield - 3 -.

All vehicles






1 Screws

• 10 ± 1 Nm

• Quantity: 2

2 Refrigerant Lines On Expansion Valve

3 O-Ring

• 13.7 mm; 2.5 mm

4 Expansion Valve

Danger due to refrigerant coming out under pressure.

Danger of frost bite to skin and other parts of the body.

• Extract the refrigerant and immediately open the refrigerant circuit after that.

• If the refrigerant was extracted more than 10 minutes in the past and the refrigerant circuit was not opened, extract the refrigerant again. Pressure in the refrigerant circuit is caused by evaporation.

• Removing

- Extract refrigerant using (ROB 134APF).

- Remove the bolts - 1 - and the refrigerant pipes - 2 - from the expansion valve.

- Remove the bolts - 8 - and the expansion valve.

5 O-Ring

• 14 mm; 1.82 mm

• Coat with refrigerant oil when installing.

6 O-Ring

• 10.8 mm; 1.82 mm

• Coat with refrigerant oil when installing.

7 O-Ring

• 9.5 mm; 2.5 mm

8 Cylindrical Combination Bolt

• 5 Nm

Installing

- Install in reverse order of removal.

Functions

• The expansion valve atomizes the streaming refrigerant and controls the flow quantity so that the vapor is gaseous only at the evaporator outlet, depending on the heat transmission.