Drain coolant, fill up and check cooling system for leaks · ar2000d1140na · Mercedes-Benz WIS

AR20.00-D-1140NA

Drain coolant, fill up and check cooling system for leaks

12.05.2020

Engine	647.981 in model 903.61/66/67, 904.61/66
	with code ZU7 (National version for Canada)
Engine	647.981 in model 903.61/66/67, 904.61/66
	with code ZU8 (National version for USA)
Engine	647.981 in model 903.61/66/67, 904.61/66
	with code ZU9 (National version for Mexico)

Drain coolant, fill up and check cooling system for leaks

1	Coolant expansion reservoir
2	Cap
3	Drain screw
4	Test connection
5	Vacuum-type cooling system filler
5.1	Evacuation valve
5.2	Filling valve
5.3	Hose
5.4	Vacuum indicator
6	Compressed-air hose

D20.00-1106-06

 Warning	Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from 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
Topical note	Notes on coolant		AH20.00-N-2080-01A
	Drain off
1	Unscrew cap (2) on coolant expansion reservoir (1).	 Carefully turn cap (2) to first safety catch and release overpressure. Then unscrew cap (2).
2	Attach hose (5.3) of receptacle to drain fitting of cooler, open drain screw (3) and drain off coolant.	 When disposing of coolant, observe legal regulations and local waste water regulations. For workshops located in Germany, please refer to the Environmental Protection Catalog of MBVD/PWU.
		 Cooler vacuum filling device	*285589002100
3	Tighten drain screw (3) and remove hose (5.3) of receptacle.	 Coolant drain plug to radiator (reference value)	*BA20.20-N-1001-01G
	Check for leaks
4	Attach test connection (4) to coolant expansion reservoir (1).	 Test cap	*124589009100
5	Attach vacuum-type cooling system filler (5) to test connection (4).	 Open evacuation valve (5.1) and close filling valve (5.2).
		 Cooler vacuum filling device	*285589002100
6	Attach compressed-air hose (6) to vacuum-type cooling system filler (5).
7	Close evacuation valve (5.1) as soon as the needle of the vacuum indicator (5.4) reaches the green area (approx. 0.8 bar).	 To do so, observe the vacuum indicator (5.4).
8	Remove compressed-air hose (6) from vacuum-type cooling system filler (5).
9	Observe pressure drop on vacuum indicator (5.4).	 The vacuum must not drop during a period of 1 min.
		If a pressure drop occurs:
		
		Localize leak and carry out suitable measures.
	Pour in
10	Check antifreeze concentration of coolant in receptacle.	 Fill coolant quantity in receptacle to filling capacity of engine cooling system and add 1 l in addition.
		 Coolant	*BF20.00-N-1001-01A
		 Mixture ratio for coolant	*BF20.00-N-1001-04A
		Depending on the findings,
		
		Correct antifreeze concentration.
		Correcting anticorrosion/antifreeze concentration	AP20.00-D-2010-01A
		 Coolant drain plug to radiator (reference value)	*BA20.20-N-1001-01G
11	Attach hose (5.3) of receptacle to filler connection of vacuum-type cooling system filler (5).
12	Briefly open the filling valve (5.2) to bleed hose (5.3) of receptacle up to the vacuum-type cooling system filler (5).
13	Attach compressed-air hose (6) to vacuum-type cooling system filler (5).
14	Open evacuating valve (5.1).
15	Close evacuation valve (5.1) as soon as the needle of the vacuum indicator (5.4) reaches the green area (approx. 0.8 bar).	 To do so, observe the vacuum indicator (5.4).
16	Open filling valve (5.2).	 The engine cooling system is filled if the vacuum indicator (5.4) displays 0 bar and no movement of coolant in the hose (5.3) of the receptacle is detected.
17	Remove vacuum-type cooling system filler (5) and test connection (4) from coolant expansion reservoir (1).	 Test cap	*124589009100
		 Cooler vacuum filling device	*285589002100
	Check
18	Check coolant level in the coolant expansion reservoir (1).	 To do so, observe "MAX" and "MIN" markings on coolant expansion reservoir (1).
		 Coolant	*BF20.00-N-1001-01A
		 Mixture ratio for coolant	*BF20.00-N-1001-04A
		Depending on the findings,
		
		Correct coolant level.
19	Screw cap (2) onto coolant expansion reservoir (1).

 Radiator, radiator hoses, radiator lines

Number	Designation		Engine 647.981
BA20.20-N-1001-01G	Coolant drain plug to radiator (reference value)	Nm	3

 Engine cooling

Number	Designation			Engine 647.981
BF20.00-N-1001-01A	Coolant	Total filling capacity	Liter	10,0
		Corrosion/antifreeze down to -37 °C	Liter	5,0
		Corrosion/antifreeze down to -45 °C	Liter	5,5
		Sheet		BB00.40-P-0310-01A
		Sheet		BB00.40-P-0325-00A
		Sheet		BB00.40-P-0325-05A
		Sheet		-

 Mixture ratio for coolant

Number	Designation			Engine all (BUS, Heavy transporter, Light transporter, TRUCK, UNIMOG)
BF20.00-N-1001-04A	Mixture ratio for coolant	Antifreeze/water down to -37 °C	%	50/50
		Antifreeze/water down to -45 °C	%	55/45
		Sheet		BB00.40-P-0310-01A
		Sheet		BB00.40-P-0325-00A
		Sheet		BB00.40-P-0325-05A

285 589 00 21 00

Cooler vacuum filling device

124 589 00 91 00

Test cap

Referenced documents

ah2000n208001a Notes on coolant
ap2000d201001a Correcting anticorrosion/antifreeze concentration
as2000z000101a Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.