874519 Removing and Installing Compressor-Evaporator Line
WM 874519 Removing and installing compressor-evaporator line
Tools
Technical values
Preliminary work
Preliminary work - removing the (A - B) line for the compressor/evaporator
1. Remove covers front left (engine compartment cover). => 700219 Removing and installing front cover (engine compartment) - section on "removing"
2. Drain coolant => 193817 Draining and topping up with coolant (includes bleeding) - section on "draining"
3. Remove brake booster and the content required for this. => 477019 Removing and installing brake booster - section on "removing"
4. Remove wiper motor. => 921519 Removing and installing wiper motor - section on "removing"
5. Remove cowl panel cover. => 664419 Removing and installing cowl panel cover - section on "removing"
Preliminary work - removing the (B - C) line for the compressor/evaporator
1. Remove covers front left (engine compartment cover). => 700219 Removing and installing front cover (engine compartment) - section on "removing"
2. Remove engine guard. => 108019 Removing and installing engine guard - section on "removing"
3. Remove left front wheel. => 440519 Removing and installing wheel - section on "removing"
4. Remove left front wheel housing liner. => 505619 Removing and installing front wheel housing liner - section on "removing"
5. Remove external power connection. => 974519 Installing and removing wiring harness for battery/external power supply - section on "removing"
6. Remove left air cleaner housing. => 242519 Removing and installing air cleaner housing - section on "removing"
Preliminary work - removing the (C - D) line for the compressor/evaporator
Remove engine guard. => 108019 Removing and installing engine guard - section on "removing"
Information
- Removal and installation is described for a Turbo vehicle. There is additional hosing on the graphics which is not installed on the naturally-aspirated engine.
Overview of line on the compressor - evaporator
Removing compressor-evaporator line
Removing the (A - B) line on the compressor - evaporator
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
Information
- The compressor - evaporator line can only be removed together with the condenser - evaporator line. => 874419 Removing and installing condenser - evaporator line - section on "Removing"
Overview of the (A - B) line on the compressor - evaporator
1. Remove refrigerant by suction. => 870317 Adding refrigerant and removing by suction - section on "Draining"
2. Press release on electrical connector -arrow A- and disconnect from pressure switch.
Pulling off plug
3. Undo two fastening screws for refrigerant lines on expansion valve.
Unscrewing the fastening screws of the refrigerant lines
4. Pull out the refrigerant lines from the expansion valve.
5. Unscrew the fastening nuts to the fastening clamps of both refrigerant lines.
Unscrewing fastening nuts on the fastening clamps
6. Unscrew fastening screws of both refrigerant lines and pull out the refrigerant line.
Unscrewing and removing the fastening screws of the refrigerant lines
7. Press the clips of the heating pipes together and push them down. Mounting tools for spring-band clamps NR.72
Pushing down clips
8. Pull hoses off the lines.
9. Loosen refrigerant lines -A and B- from the retaining clips and pull them up and out.
Releasing refrigerant lines from the retaining clips
Removing the (B - C) line on the compressor - evaporator
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
Information
- The compressor - evaporator line can only be removed together with the condenser - evaporator line. => 874419 Removing and installing condenser - evaporator line - section on "Removing"
Overview of the (B - C) line on the compressor - evaporator
1. Remove refrigerant by suction. => 870317 Adding refrigerant and removing by suction - section on "Draining"
2. Unscrew fastening screw of the refrigerant line -B- on the condenser and pull out the refrigerant line.
Unscrewing the refrigerant line on the condenser
3. Unscrew refrigerant line fastening screw for the compressor on the pressure damper.
Releasing the refrigerant line for the compressor on the pressure damper
4. Pull the refrigerant line from the connection.
5. Unscrew both fastening nuts on the pressure damper of the compressor - condenser line and the fastening nut of the condenser / evaporator line.
Unscrewing fastening nuts
6. Unscrew fastening screw for the mount of the refrigerant lines and open the mount.
Releasing and opening up the mount
7. Detach mount on the refrigerant line.
8. Unscrew fastening screws of both refrigerant lines and pull out the refrigerant line.
Unscrewing fastening screws and pulling out the refrigerant line
9. Carefully unclip the connecting lines from the mount.
Unclipping connecting lines from the mount
10. Lift the vehicle. Hold both refrigerant lines together, twist them, and pull them downward through the left wheel housing opening.
Removing the (C - D) line on the compressor - evaporator
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 the (C - D) line on the compressor - evaporator
1. Remove refrigerant by suction. => 870317 Adding refrigerant and removing by suction - section on "Draining"
2. Unscrew refrigerant line fastening screw for the compressor on the pressure damper.
Releasing the refrigerant line for the compressor on the pressure damper
3. Pull the refrigerant line from the connection.
4. Unscrew the fastening screw on the air conditioning compressor.
Unscrewing the fastening screw on the air-conditioning compressor
5. Pull out the refrigerant line from the compressor and remove downwards from the engine area.
Installing compressor-evaporator line
Installing the (A - B) line on the compressor - evaporator
Information
- Always replace the sealing rings of the refrigerant lines.
- Spray the sealing rings with refrigerant oil before fitting.
- The compressor - evaporator line can only be installed together with the condenser - evaporator line. => 874419 Removing and installing condenser - evaporator line - section on "Installing"
1. Insert refrigerant lines in the radiator tank, position them, and clip them into the retaining clips.
Positioning and securing refrigerant lines
2. Attach the hoses for the heating to the lines and fix them with clips. Mounting tools for spring-band clamps NR.72
Connecting and securing hoses for heating
3. Attach the refrigerant lines in the engine compartment to the connections (do not tilt) and screw down using the fastening screws -1-. => Tightening torque: 9 ftlb.
Tightening fastening screws
4. Screw down the fastening nuts to the fastening clamps of both refrigerant lines. => Tightening torque: 6 ftlb.
Screwing down fastening nuts on the fastening clamps
5. Carefully place refrigerant lines onto expansion valve and press into place (do not tilt) and screw down using the two fastening screws. => Tightening torque: 9 ftlb.
Positioning refrigerant lines on the expansion valve and screwing down
Installing the (B - C) line on the compressor - evaporator
Information
- Always replace the sealing rings of the refrigerant lines.
- Spray the sealing rings with refrigerant oil before fitting.
- The compressor - evaporator line can only be installed together with the condenser - evaporator line. => 874419 Removing and installing condenser - evaporator line - section on "Installing"
Overview of the (B - C) line on the compressor - evaporator
1. Lift the vehicle. Hold both refrigerant lines together, twist them, and insert them from below through the left wheel housing opening.
2. Carefully clip in the connecting lines of the refrigerant lines into the holder.
Clipping in connecting lines into the mounts
3. Attach the refrigerant lines in the engine compartment to the connections (do not tilt) and screw down using the fastening screws -1-. => Tightening torque: 9 ftlb.
Tightening fastening screws
4. Position refrigerant lines on wheel arch without tension.
5. Position the pressure damper of the compressor - evaporator line and the condenser - evaporator line.
Positioning pressure damper
6. Place the three fastening clamps onto the threaded pins and screw down using the three fastening nuts -3-. => Tightening torque: 6 ftlb.
7. Plug in the refrigerant line from the compressor on the pressure damper (do not tilt) and screw down with the fastening screw -1-. => Tightening torque: 9 ftlb.
Tightening the refrigerant line for the compressor on the pressure damper
8. Engage the refrigerant lines in the holder on the wheel arch, close them, and screw down using the fastening screw -2-. => Tightening torque: 1 ftlb.
Securing refrigerant lines in the mount and screwing down
9. Engage mount on the refrigerant line.
10. Insert refrigerant line -B- into the condensor and screw it in using the fastening screw on the condenser. => Tightening torque: 9 ftlb.
Screwing down the refrigerant line on the condenser
Installing the (C - D) line on the compressor - evaporator
Information
- Always replace the sealing rings of the refrigerant lines.
- Spray the sealing rings with refrigerant oil before fitting.
Overview of the (C - D) line on the compressor - evaporator
1. Insert the refrigerant line from below into the engine area onto the air conditioning compressor.
Inserting and screwing down refrigerant line to the air conditioning compressor
2. Screw in fastening screw -1- on the compressor and screw down. => Tightening torque: 9 ftlb.
3. Plug in the refrigerant line from the compressor on the pressure damper (do not tilt) and screw down with the fastening screw -1-. => Tightening torque: 9 ftlb.
Tightening the refrigerant line for the compressor on the pressure damper
Subsequent work
Subsequent work - installing the (A - B) line on the compressor/evaporator
1. Fill in refrigerant. => 870317 Evacuating and filling in refrigerant - section on "filling"
2. Install brake booster and the content required for this. => 477019 Removing and installing brake booster - section on "installing"
3. Install wiper motor. => 921519 Removing and installing wiper motor - section on "installing"
4. Install cowl panel cover. => 664419 Removing and installing cowl panel cover - section on "installing"
5. Refill coolant => 193817 Draining and refilling coolant (includes bleeding) - section on "refilling"
6. Install covers front left (engine compartment cover). => 700219 Removing and installing front cover (engine compartment) - section on "installing"
Subsequent work - installing the (B - C) line for the compressor/evaporator
1. Install external power connection. => 974519 Installing and removing wiring harness for battery/external power supply - section on "installing"
2. Install left air cleaner housing. => 242519 Removing and installing air cleaner housing - section on "installing"
3. Install left front wheel housing liner. => 505619 Removing and installing front wheel housing liner - section on "installing"
4. Fit left front wheel. => 440519 Removing and installing wheel - section on "installing"
5. Fit engine guard. => 108019 Removing and installing engine guard - section on "installing"
6. Fill in refrigerant. => 870317 Evacuating and filling in refrigerant - section on "filling"
7. Install covers front left (engine compartment cover). => 700219 Removing and installing front cover (engine compartment) - section on "installing"
Subsequent work - installing the (C - D) line for the compressor/evaporator
1. Fill in refrigerant. => 870317 Evacuating and filling in refrigerant - section on "filling"
2. Fit engine guard. => 108019 Removing and installing engine guard - section on "installing"