169 589 00 91 00
Test cap
210 589 00 91 00
Test cap
285 589 00 21 00
Cooler vacuum filling device
Engine 780 in model 242
When charging the coolant, the filling routine must be activated using a diagnostic unit.
The wheel alignment check cannot be performed correctly otherwise.
Illustrated on model 169
1 | Screw tester cap (2) onto the expansion reservoir (1). |
2 | Attach the control unit (3) to the tester cap (2) . |
3 | Attach Venturi nozzle (9) to control unit (3). |
4 | Close drain valve (8) and feed valve (7). |
P20.00-2245-06
5 | Place feed hose (4) of the coolant on the coolant reservoir (4). |
To prevent air from being drawn in, ensure that the coolant reservoir (4a) contains more coolant on the coolant reservoir than the maximum filling capacity of the cooling system. |
6 | Guide waste air hose (5) into an empty container (5a). |
7 | Connect compressed air hose (6) to the Venturi nozzle (9) and apply pressure. |
The overpressure in the compressed air supply for the workshop must be at least about 8 bar so that sufficient vacuum can be generated through the Venturi nozzle (9). |
8 | Open the drain valve (8). |
A vacuum is generated in the cooling system. |
9 | Open feed valve (7) until feed hose (4) has filled with coolant. |
10 | Close drain valve (8) if display of the control unit (3) is in the green area. |
11 | Remove compressed air hose (6) from the Venturi nozzle (9) and monitor if the vacuum remains stable for 30 seconds. |
If this is not the case, check hoses and connections and if necessary, repair and create a new vacuum. |
12 | Open feed valve (7). |
The cooling system is charged. |
13 | Open drain valve (8) if coolant is no longer suctioned. |
14 | Remove control unit (3) along with all connections and tester cap (2). |
15 | Fill coolant level up to the lower edge of the filler neck of the expansion reservoir (1). |