82691950 Removing and Installing Water Tube For Auxiliary Heating - Water Tube From Directional-Control Valve to Second Heat Ex

WM 826919 Removing and installing water tube for auxiliary heating - water tube from directional-control valve to second heat exchanger

Tools





Technical values






Preliminary work

1. Remove complete heater. -> 822019 Removing and installing complete heater - section on "Removing" 822019 Removing and installing complete heater
2. Remove intake muffler with intake manifold. -> 822119 Removing and installing intake muffler - section on "Removing" 822119 Removing and installing intake muffler

Removing water tube for auxiliary heating - water tube from directional-control valve to second heat exchanger





Installation position of water tube from directional-control valve to second heat exchanger

1. Unscrew fastening screw -2- and remove water tube holder -1-.





Removing water tube holder

2. Drill out blind rivet -1- at the water tube.





Drilling out blind rivet at water tube

3. Remove water tube holder.
3.1. Screw off both fastening nuts -1-.
3.2. Unscrew fastening screw -2-.
3.3. Remove water tube holder -3- ( -arrow- ).





Removing water tube holder

4. Loosen water tube at the heater.
4.1. Undo spring band clamp using assembly pliers for spring band clamps, Cayenne hose connections NR.72-1 ( -arrows A- ) and push down off the adapter -arrow B-.
4.2. Pull water tube down at the heater -arrow C- and remove water tube.





Loosening water tube at heater

5. Unscrew fastening screws -1- on the heater.





Unscrewing fastening screws on heater

6. Loosen water tube on directional-control valve at the top.
6.1. Undo spring band clamp using assembly pliers for spring band clamps, Cayenne hose connections NR.72-1 ( -arrows A- ) and push down off the connection -arrow B-.
6.2. Pull water tube off the directional-control valve -arrow C- and remove it.





Loosening water tube on directional-control valve at the top

Installing water tube for auxiliary heating - water tube from directional-control valve to second heat exchanger

1. Secure water tube on the directional-control valve at the top.

Information

- Before connecting the water hoses, apply suitable rubber lubricant to the flanges.

1.1. Place water tube in installation position and slide onto the directional-control valve at the top -arrow A-.
1.2. Slide spring band clamp onto the connection using the assembly pliers for spring band clamps, Cayenne hose connections NR.72-1 ( -arrow B- ) and align with the markings.
1.3. Slacken spring band clamp -arrows C- and secure the hoses.





Securing water tube on directional-control valve at the top

2. Position heater on holder and secure with the fastening screws -1-. => Tightening torque: 8 Nm (6 ftlb.)





Tightening fastening screws on heater

3. Secure water tube at the heater.

Information

- Before connecting the water hoses, apply suitable rubber lubricant to the flanges.

3.1. Place water tube in installation position and slide it onto the heater -arrow A-.
3.2. Slide spring band clamp onto the connection using the assembly pliers for spring band clamps, Cayenne hose connections NR.72-1 ( -arrow B- ) and align with the markings.
3.3. Slacken spring band clamp -arrows C- and secure the hose.





Securing water tube at heater

Information

Make sure the water tube holder is installed at the correct position.

The exhaust pipe runs behind the water tube holder.

4. Install water tube holder.
4.1. Position water tube holder -3- ( -arrow- ).
4.2. Tighten fastening screw -2-. => Tightening torque: 4.5 Nm (3.5 ftlb.)
4.3. Tighten fastening nuts -1-. => Tightening torque: 6 Nm (4.5 ftlb.)





Installing water tube holder

5. Position water tube on holder and secure with a blind rivet -1- (4.8 x 10).





Positioning water tube on holder and securing with a blind rivet

6. Push water tube holder -1- onto the two water tubes and screw down using the fastening screw -2-. => Tightening torque: 3 Nm (2 ftlb.)





Installing water tube holder

Subsequent work

1. Install intake muffler with intake manifold. -> 822119 Removing and installing intake muffler - section on "Installing" 822119 Removing and installing intake muffler
2. Install complete heater. -> 822019 Removing and installing complete heater - section on "Installing" 822019 Removing and installing complete heater