Remove grease and scale in the cooling system

AR20.00-G-1030NA

14.12.10

ENGINES 902.912 in MODEL 405.210 /230
for USA/Canada only

ENGINES 906.936 in MODEL 405.210 /230
for USA/Canada only

ENGINES 906.967 in MODEL 405.210 /230 with CODE (M03) Increased engine output,
for USA/Canada only

	Remove grease
 Danger!	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
1	Drain coolant fully and collect
	Notes on coolant	All engines	AH20.00-N-2080-01A
2	Remove coolant thermostat	Engine 906	AR20.10-G-2460NA
		Engine 902	AR20.10-G-2460NE
3	Block open main valve at coolant thermostat with a wire
4	Install coolant thermostat	Engine 906	AR20.10-G-2460NA
		Engine 902	AR20.10-G-2460NE
5	Fill cooling system with a 5% solution of a mildly alkaline cleaner and fresh water	 Mixing ratio: 50 g cleaner to 1 liter water.
		Cleaner for engine and cooling system	*BR00.45-Z-1009-04A
Danger!	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
6	Warm up engine at moderate revs to a coolant temperature of approx. 80°C and maintain at this coolant temperature for about 5 minutes	 The radiator can be covered over if necessary.
7	Switch off engine and allow coolant temperature to cool down to approx. 50°C
8	Drain solution fully form the cooling system	 Dispose of solution in an environmentally compatible manner.
9	Flush cooling system 2 times with fresh water; run engine with each flushing filling for about 5 minutes for this purpose	 Dispose of water in an environmentally compatible manner.
	Remove scale
10	Fill cooling system with a 10% solution of water and citric, tartaric or oxalic acid	 Before removing scale, always remove grease in the cooling system even if there is no visible sign of oiling. Chromic acid or products containing chrome must not be used because of the risk of contaminating wastewater.
		 Preference should be given to the use of citric acid. Mixing ratio: 100 g citric acid to 1 liter water.
		 Chemicals for preparing the solutions can be obtained from the chemical trade. Commercially available products which contain the aforementioned acids, may also be used for removing scale and rust.
11	Run engine at moderate revs to warm it up to about 80°C and hold at this temperature for about 10 minutes
12	Switch off engine and allow to cool down to approx. 50°C
13	Drain solution completely	 Dispose of solution in an environmentally compatible manner.
14	Flush cooling system at least 3 times with fresh water; run engine with each flushing filling for 5 minutes for this purpose	 Dispose of water in an environmentally compatible manner.
15	Remove coolant thermostat	Engine 906	AR20.10-G-2460NA
		Engine 902	AR20.10-G-2460NE
16	Remove blocking at the coolant thermostat	 Check coolant thermostat for damage, replace it if required.
17	Install coolant thermostat	Engine 906	AR20.10-G-2460NA
		Engine 902	AR20.10-G-2460NE
18	Fill cooling system with specified coolant and check for leaks	 See service instructions.

Repair materials

Number	Designation	Order number
BR00.45-Z-1009-04A	Cleaner for engine and cooling system	-

เอกสารที่อ้างถึง