17 00 039 Venting and filling cooling system with vacuum filling unit: Application

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Connect filling unit (1) with adapter (2) 17 0 113 to coolant expansion tank.

Shutoff valves (A) and (B) must be closed.

Fig 1: Identifying Coolant Filling Unit, Adapter And Shut-Off Valves

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Connect venturi nozzle (1) to filling unit (2).

Fig 2: Identifying Coolant Filling Unit And Venturi Nozzle

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Connect compressed air (1) and open shutoff valve (B).

The venturi nozzle produces a flow noise.

Fig 3: Opening Shut-Off Valves Using Compressed Valve

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Then open shutoff valve (A) until the filling hose (1) is free of bubbles. Close shutoff valve (A) again. The filling hose (1) is vented in this way.

Fig 4: Identifying Filling Hose And Shut-Off Valve

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Shutoff valve (B) remains open. Generate vacuum in cooling cycle for approx. 1 minute. The end vacuum is reached at a vacuum of -0.7 to -0.95 bar. Green scale on the vacuum meter.

NOTE: The coolant hoses contract during vacuum buildup.

Then close shutoff valve (B) again.

Fig 5: Opening Shut-Off Valves Using Compressed Valve

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Both shutoff valves (A) and (B) must be closed. Then seal Venturi nozzle (1).

Fig 6: Identifying Venturi Nozzle And Shutoff Valves

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The cooling system must hold the vacuum for 30 seconds. If the needle in the vacuum meter falls, this indicates a leak in the cooling system.

If the vacuum remains constant, proceed with filling.

In the event of leaks, check COOLING SYSTEM FOR LEAKS .

Fig 7: Checking Cooling System For Leaks

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IMPORTANT: There must be sufficiently PREMIXED COOLANT in the filling unit container, 1 - 2 liters more than the vehicle filling capacity.
Position the filling unit container at the same height as the coolant expansion tank.

Shut-off valve (B) remains closed during the filling process.

To fill the cooling system, open shutoff valve (A) to filling unit container.

Coolant is now added.

Fig 8: Identifying Cooling System Shut-Off Valves

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The filling procedure is finished when the needle in the vacuum meter is at 0 bar or no longer falls.

If necessary, reduce remaining vacuum. Open shutoff valve (B) to do so.

Remove filling unit with adapter from expansion tank.

Adjust coolant level to maximum.

Fig 9: Locating Maximum Coolant Level

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Close coolant expansion tank.

Installation note:

Close the sealing cap (1) until the arrows line up.

Fig 10: Identifying Coolant Expansion Tank Sealing Cap

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