Engine cooling system - check fluid level, adjust to correct level. Inspect anticorrosion/antifreeze protection, adjust to correct concentration · ap2000g2010u · Mercedes-Benz WIS

AP20.00-G-2010U

Engine cooling system - check fluid level, adjust to correct level. Inspect anticorrosion/antifreeze protection, adjust to correct concentration

28.02.2014

ENGINE

934.97, 936.97 in MODEL 405

Modification notes

18.02.2014

Document completely revised.

Engine cooling system - check fluid level, adjust to correct level. Inspect
anticorrosion/antifreeze protection, adjust to correct concentration

1	Cap
2	Coolant expansion reservoir
3	Cap
Pfeil A	Marking "6cyl. with Allison MAX" (dotted marking)

G20.20-3255-71

G20.20-3247-71


4	Radiator
5	Drain screw


	2	Coolant expansion reservoir
	6	Funnel

G20.20-3248-71

 Danger !	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
 Danger !	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
	Notes on coolant		AH20.00-N-2080-01A
	Check
1	Check coolant level on coolant expansion reservoir (2)	 Check coolant level at coolant temperature under 50_°C only. The coolant expansion reservoir (2) on 4cylinder and 6cylinder engines must be filled to the "6cyl. with Allison MAX" (arrow A) marking.
2	Unscrew cap (1)
3	Check composition of anticorrosion or antifreeze	 If the antifreeze content is too low, calculate the deficient quantity of antifreeze.
		Correct corrosion and antifreeze protection subject to separate repair order
		

		Correcting anticorrosion/antifreeze concentration	AP20.00-G-2010-01U
		 Coolant	*BF20.00-N-1001-01O
		After calculating the deficient quantity:
		
		Open drain screw (5) and drain coolant (to match missing quantity of antifreeze) into a container. Then tighten drain screw (5). Then perform operation steps 5 to 13.
		 Drain screw on engine radiator	*BA20.20-N-1004-02C
4	Tighten cap (1)	Only perform, if no coolant or antifreeze has to be added.
	Add coolant or antifreeze
5	Switch on ignition
6	Set heater control to warm and switch on blower
7	Switch on auxiliary water heater	Only with CODE D6N (Auxiliary water heater, cab and engine).
8	Add coolant or antifreeze	 If the cab is not tilted, the coolant or antifreeze can be added using a funnel (6). For this, remove cap (3) and insert a funnel (6) into the opening. When filling in the coolant or antifreeze, the cap (1) must be unscrewed.
		 The coolant expansion reservoir (2) on 4cylinder and 6cylinder engines must be filled to the "6cyl. with Allison MAX" (arrow A) marking.
		 Coolant	*BF20.00-N-1001-01O
9	Fit cap (1) and, if necessary, cap (3)
10	Start engine and allow to run for approx. 10 minute	 Check coolant level at coolant temperature under 50_°C only. Check coolant level with engine running, if necessary add coolant.
11	Turn off engine
12	Switch off auxiliary water heater	Only with CODE D6N (Auxiliary water heater, cab and engine).
13	Check coolant level again, if necessary, correct coolant level

 Engine radiator, coolant hoses and lines

Number	Designation		ENGINE 934.9, 936.9 in MODEL 405
BA20.20-N-1004-02C	Drain screw on engine radiator	Nm	4

 Filling capacities for engine cooling system

Number	Designation			ENGINE 934.97 in MODEL 405	ENGINE 936.97 in MODEL 405
BF20.00-N-1001-01O	Coolant	Total filling capacity	Liter	30,0	34,0
		Anticorrosion/antifreeze agent down to –37 °C	Liter	15,0	17,0
		Anticorrosion/antifreeze agent down to –45 °C	Liter	16,5	18,7
		Sheet		BB00.40-P-0310-01A	BB00.40-P-0310-01A
		Sheet		BB00.40-P-0325-05A	BB00.40-P-0325-05A

Referenced documents

ah2000n208001a Notes on coolant
ap2000g201001u Correcting anticorrosion/antifreeze concentration
as0000z000501a 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.
as2000z000101a Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.