Venting air from low temperature circuit - AR20.00-P-1145H

ENGINE 275, 285 

Fig 1: Identifying Venturi Nozzle, Pressure Tube And Connections

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Vacuum-type cooling system filler with low-temperature circuit (NTKL) adaptation 

Fig 2: Identifying Bleeding System Components

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Prepare for bleeding: line routing Illustrated on model 230 

Fig 3: Routing Line For Bleeding Cooling System

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Perform bleeding: line routing Illustrated on model 230 

Fig 4: Bleeding Cooling System

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	Risk of injury  to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning  caused by swallowing coolant.	Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses.	AS20.00-Z-0001-01A
	Notes on coolant	All engines	AH20.00-N-2080-01A
	Only conduct ventilation procedure on a cold engine
	Vacuum-type cooling system filler		Figure
	NTKL adapter		Fig 7
1.1	Attach STAR DIAGNOSIS in order to actuate the circulation pump for the low-temperature circuit	Model 216, 221
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
1.2	Preparing for actuation of the circulation pump on the low temperature circuit	Model 215, 220	AR20.00-P-1145-01M
		Model 230	AR20.00-P-1145-01R
		Model 240	AR20.00-P-1145-01H
2	Screw on connection (M) at pressure tube (7) of the venturi nozzle (6)	The venturi nozzle (6) will lose its function if used without the pressure tube (7). The venturi nozzle (6) does not generate a vacuum but creates excess pressure at connection (U) if the compressed air is connected without the pressure tube (7). When first assembling the venturi nozzle (6) connection (M) on the workshop equipment compressed air system must be closed.
3	Fill coolant reservoir (4) with coolant	20 liter
4	Open low temperature circuit at filler neck and screw on test cap	Tester cap	Figure
5	Empty vacuum box (1)
6	Prepare low temperature circuit for bleeding and check for leaks		AR20.00-P-1145-02R
7	Bleed low temperature circuit using circulation pump and vacuum		AR20.00-P-1145-03R
8	Close cooler vacuum filling device	Close connections (A, B) and close diagnostic sockets for low temperature circuit.
9	Screw on test cap and close low temperature circuit
10	Replace switch (2) for manual actuation of the circulation pump against a relay

Fig 5: Identifying Test Cap (124 589 00 91 00)

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Fig 6: Identifying Vacuum-Type Cooling System Filler (285 589 00 21 00)

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Fig 7: Identifying NTKL Adapter (285 589 01 21 00)

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