Check Low Temperature Circuit For Leaktightness - AR09.41-P-1011MND

Engine 276.8 In Model 213, 238

Courtesy of MERCEDES-BENZ USA

	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 overpressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses.	AS20.00-Z-0001-01A
Notice	Notes on coolant		AH20.00-P-2080-01KOA
	Remove
1	Unscrew cap on expansion reservoir (1)
	Check
2	Check coolant level and antifreeze content of coolant in Low Temperature circuit and correct if necessary	Cooling system	*BF20.00-P-1001-02BA
3	Screw tester cap (2) on expansion reservoir (1)	Test cap	Fig 1
4	Connect pressure pump (3) at tester cap (2)	Pressure pump	Fig 2
5	Apply compressed air to Low Temperature circuit for 2 minutes at the test pressure	Do not exceed the specified test pressure. Damage can occur otherwise on the Low Temperature circuit. There should be no pressure loss within a period of 2 minutes. Engine 276.8 in model 213, 238Test pressure for pressure-testing the Engine cooling system	*BE20.30-P-1005-01A
6	Perform a visual inspection on the assembly parts carrying coolant	In the event of pressure loss. Check condition and coolant loss for all assembly parts carrying coolant and connections and remove coolant loss if necessary using suitable measures.
	Install
7	Actuate pressure relief button on pressure pump (3) and relieve the pressure	Pressure pump	Fig 2
8	Unscrew tester cap (2) at the expansion reservoir (1)	Test cap	Fig 1
	Check
9	Check coolant level and antifreeze content coolant	If necessary. Cooling system	*BF20.00-P-1001-02BA
10	Screw cap onto expansion reservoir (1)

RADIATOR OR EXPANSION RESERVOIR CAP

Number	Designation			1-stage cover latch	2-stage latch cover
BE20.30-P-1005-01A	Test pressure for pressure-testing the engine cooling system	Overpressure	bar	1, 4	1, 4

COOLING SYSTEM

Number	Designation				Engine 276 in model 213	Engine 276 in model 238
BF20.00-P-1001-02BA	Cooling system	Workshop replacement amount	Main circuit	L	≈12, 0	≈12, 0
		Workshop replacement amount	Low Temperature circuit	L	≈3, 5	≈2, 8
		Antifreeze/water	Up to -37°C	%	50/50	50/50
			As of -38 °C	%	55/45	55/45
			Fluids specifications		BB00.40-P-0310-01A	BB00.40-P-0310-01A
			Fluids specifications		BB00.40-P-0325-06A	BB00.40-P-0325-06A
			Fluids specifications		BB00.40-P-0326-06A	BB00.40-P-0326-06A

Fig 1: Identifying Test Cap (210 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Pressure Pump (124 589 24 21 00)

Courtesy of MERCEDES-BENZ USA