Regulations and care
Changing the cooling water
A4.05.09.02
M20-M601C
en / 15.11.2000 BA020059 2/2
Ĺ
2. Cooling water with anti-freeze agent
In case of temperatures at or below the freezing point of the cooling water an anti-freeze agent
must be added to the coolant.
Only an anti-freeze agent with a corrosion protective effect may be used.
To obtain adequate corrosion protection, a 30 % concentration is necessary. The highest
concentration is 50%.
This agent must be changed annually.
When an anti-freeze agent is used, a reduction in cooling efficiency must be expected. In cases
of doubt MaK should be contacted.
For summer operation, it is advisable to drain off the cooling water with anti-freeze in it and
replace it with cooling water with chemical corrosion protection in order to guarantee adequate
radiator performance at higher ambient temperatures.
3. Cleaning the cooling water chambers
Before badly scaled cooling water chambers can be cleaned, they must be precleaned as
described and flushed well with water under pressure. This will remove loose foreign matter
such as sand and sludge which may have been deposited at places where the water flow speed
is low.
The firm which supplies the anti-corrosion material will usually be able to offer a good cleaning
agent for scale, such as:
Drew Chemical: SAF - ACID
Rohm + Haas: RD 13 M
Attention:
Keep to the manufacturer´s instructions!Improper use of the cleaning agents may cause
damages to your health!
Flush cooling water chambers or cooling system with a 1 % sodium carbonate solution after
draining off the cleaning agent. Afterwards flush the water chambers with fresh water.
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