878319 Removing and installing pressure switch

WM 878319 Removing and installing pressure switch

Technical values





Preliminary work

1. Remove wiper linkage. -> 921519 Removing and installing wiper motor - section on "removing" 921519 Removing and installing wiper motor
2. Remove cowl panel cover. -> 664419 Removing and installing cowl panel cover - section on "removing" Service and Repair

Removing pressure switch

Information

- The pressure switch is located in the radiator tank in the direction of travel under the cowl panel cover.





Overview of pressure switch

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

1. Drain refrigerant. -> 870317 Adding refrigerant and removing by suction - section on "Draining" Service and Repair
2. Press release on electrical connector -a- and disconnect from pressure switch.





Tightening plug from pressure switch

3. Place one open-ended wrench on the hexagon of the pressure switch and a second open-ended wrench on the hexagon of the refrigerant line.





Releasing pressure switch

4. Unscrew pressure switch from refrigerant line in direction of arrow and remove.

Installing pressure switch

1. Replace the O-ring on the pressure switch and wet it with refrigerant oil.
2. Screw pressure switch onto refrigerant line and tighten with an open-ended wrench. Counter with a second open-ended wrench. => Tightening torque: 3.5 ftlb.





Screwing pressure switch onto refrigerant line

3. Push electrical plug onto pressure switch until it clicks into place.





Pushing plug onto pressure switch

Subsequent work

1. Fill in refrigerant. -> 870317 Evacuating and filling in refrigerant - section on "filling" Service and Repair
2. Install cowl panel cover. -> 664419 Removing and installing cowl panel cover - section on "installing" Service and Repair
3. Install wiper linkage. -> 921519 Removing and installing wiper motor - section on "installing" 921519 Removing and installing wiper motor