Drain/fill low-temperature circuit coolant - AR09.41-P-6834NKE

ENGINE 780 in MODEL 242 

MODIFICATION NOTES

26.9.14

Mixing ratio coolant

BF20.00-P-1001-04A

Fig 1: Unscrewing Cap On Low-Temperature Circuit Coolant Expansion Reservoir

Courtesy of MERCEDES-BENZ USA

Fig 2: Mounting Clamp On Front Left Coolant Hose

Courtesy of MERCEDES-BENZ USA

	Risk of injury  due to fan starting unexpectedly	Do not reach into the rotation or hazard area of the fan. Wear closed and close-fitting work clothes.	AS20.40-Z-0001-01A
	Risk of injury  to skin and eyes suffering scalding from contact with hot coolant spray. 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
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Notes on coolant		AH20.00-N-2080-01A
	Drain off
1	Unscrew cap on low-temperature circuit coolant expansion reservoir (2)	Unscrew cap slowly on low-temperature circuit coolant expansion reservoir (2) and relieve overpressure. Scolding can occur otherwise through spitting out of hot coolant.
2	Mount screw on tester cap (1) at low-temperature circuit coolant expansion reservoir (2)	Test cap	Figure
3	Remove underfloor paneling		AR61.30-P-1001NKB
4	Mount clamp (4) on front left coolant hose (5)	Clamp	Fig 6
5	Disconnect coolant hose at rear left (6)	To do this unfasten clamp (7) and catch escaping coolant in a suitable container.
6	Create pressure slowly over the pressure reducing valve (3)	A pressure of a maximum of 1.5 bar is permissible. Damage may occur otherwise if not observed. A pressure of about 0.5 bar is sufficient to empty the low-temperature circuit. Collect flowing out coolant in a suitable container.
7	Put together the coolant hose on the front left (5) and the coolant hose on the rear left (6)
8	Remove clamp (4) on front left coolant hose (5)	Clamp	Fig 6
9	Mount clamp (4) on rear left coolant hose (6)	Clamp	Fig 6
10	Disconnect coolant hose at front left (5)
11	Create pressure slowly over the pressure reducing valve (3)	A pressure of a maximum of 1.5 bar is permissible. Damage may occur otherwise if not observed. A pressure of about 0.5 bar is sufficient to empty the low-temperature circuit. Collect flowing out coolant in a suitable container.
12	Install coolant hose at front left (5)	To do this mount clamps (7).
	Pour in
13	Pour in coolant and bleed cooling system		AR20.00-P-1142-04AK
		Use clean coolant again.
		Coolant mixing ratio	*BF20.00-P-1001-04A
		Test cap	Figure
		Test cap	Figure
		Cooler vacuum filling device	Figure
14	Detach screw on tester cap (1) at low-temperature circuit coolant expansion reservoir (2)	Test cap	Figure
15	Tighten down cap on low-temperature circuit coolant expansion reservoir (2)
16	Check low-temperature circuit cooling system for leaktightness		AR20.00-P-1010NKE
	Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
17	Perform an engine test run; check cooling system low-temperature circuit for proper function
18	Install underfloor paneling		AR61.30-P-1001NKB

COOLANT MIXING RATIO

Number	Designation			ENGINE ALL
BF20.00-P-1001-04A	Coolant mixing ratio	Antifreeze/water	to -37°C	50/50
		Antifreeze/water	to 55/45	-45°C
		Specification		Coolant (Specification 310.1). See https://bevo.mercedes-benz.com/index.php?language_id=1

Fig 3: Identifying Test Cap (169 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Cooler Vacuum Filling Device (285 589 00 21 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Test Cap (210 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 6: Identifying Clamp (000 589 54 37 00)

Courtesy of MERCEDES-BENZ USA