877019 Removing and installing expansion valve

WM 877019 Removing and installing expansion valve

Technical values





Preliminary work

1. Remove wiper arms. => 922519 Removing and installing wiper arm - section on "Removing"
2. Remove cowl panel cover. => 664419 Removing and installing cowl panel cover - section on "Removing"

Removing expansion valve

CAUTION

Danger of injury from contact with the refrigerant

-> Observe safety regulations when working with refrigerant. => 80 Safety regulations for working on air-conditioned vehicles and dealing with refrigerant R134a





Overview of expansion valve

1. Remove refrigerant by suction. => 870317 Adding refrigerant and removing by suction - section on "Draining"
2. Undo two fastening screws for refrigerant lines on expansion valve.





Unscrewing fastening screws of the refrigerant lines on the expansion valve

3. Remove refrigerant lines from expansion valve and move them up/down to keep them out of the way.





Pulling out the refrigerant lines from the expansion valve

4. Unclip brake booster line to keep it out of the way.





Unclipping line for the brake booster

5. Undo the two fastening screws and remove expansion valve.





Removing expansion valve

Installing expansion valve

Information

- Before the expansion valve is re-installed, the O-rings of the refrigerant lines must be checked for damage and replaced if necessary.

- Wet the O-rings of the refrigerant lines with refrigerant oil.

1. Carefully push expansion valve onto refrigerant lines from evaporator - do not tilt.





Installing and screwing down the expansion valve

2. Insert the two fastening screws -arrows- and screw down. => Tightening torque: 6.5 ftlb.
3. Clip line from brake booster into the holder.





Clipping in line from brake booster

4. Position refrigerant lines on expansion valve and press into place - do not tilt.





Positioning refrigerant lines on the expansion valve

5. Carefully push refrigerant lines onto expansion valve (do not tilt) and tighten with the two fastening screws. => Tightening torque: 7.5 ftlb.





Pushing on and screwing down refrigerant lines on the expansion valve

Subsequent work

1. Install wiper arms. => 922519 Removing and installing wiper arm - section on "Installing"
2. Install cowl panel cover. => 664419 Removing and installing cowl panel cover - section on "Installing"
3. Fill in refrigerant. => 870317 Evacuating and filling in refrigerant - section on "Filling"