Caution - danger! Fuel leak! The fuel in the power system is under pressure.
Loosen clamp and disconnect fuel line -F- from connector. Replace the clamp clamp with a screw clamp. Seal fuel lines with suitable plugs. Unclip cover -G- -arrows-.
Internal parts and assemblies of the auxiliary heater
- 1 - Cover for auxiliary heater control unit -J364-
- 2 - Temperature sender -G18-
- 3 - Overheating sensor -G189-
- 4 - Pipe of the combustion chamber. The figure shows the version for a vehicle with a petrol engine and a fine filter in the fuel line
- 5 - Heat exchanger
- 6 - 7 Nm, 3 pcs.
- 7 - Spring
- 8 - 4 Nm
- 9 - Gasket, after each removal must be replaced
- 10 - Lid
- 11 - Spigot, mark installation position
- 12 - 4 Nm
- 13 - Mounting flange
- 14 - Spigot, mark installation position
- 15 - Mounting bracket
- 16 - Glow plug with flame monitor -Q8-, make sure it is installed correctly, only possible on vehicles with petrol engine. In the version for vehicles with a diesel engine, the fuel preheating element -Z66- has a non-removable design and cannot be removed from the combustion chamber pipe. Its wires are connected to the wires of the glow plug with flame monitor -Q8-. With this design, if the glow plug with flame monitor -Q8- fails, the complete combustion tube must be replaced.
- 17 - Burner. With fuel shut-off valve -N109- integrated in the fuel line (non-removable design). The fuel shut-off valve -N109- is only available for vehicles with a diesel engine. The fuel shut-off valve -N109- prevents fuel from entering the combustion chamber after the auxiliary heater has been switched off. In order to be able to depressurise the fuel line between the fuel cut-off valve -N109- and the metering pump -V54-, the metering pump -V54- is provided with a bypass. Install nodes with the corresponding number. Fuel cut-off valve -N109- can be checked using tester -VAS 5051 B- or a later version.
- 1B - Heater combustion air blower -V6-, combustion air blower -V5- and its housing form one integral unit
- 19 - Additional heater control unit J354
- 20 - 4 Nm, 4 pcs
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