Maintenance and care
33
Cooling
Fill the cooling system of the engine with a
mixture of drinkable tap water and anti-
freeze agent on ethylene glycole basis or
anti-corrosion agent.
See Publication ”Fuels, Lubricants and
Coolants for industrial and marine Diesel
engines”.
Filling-in of coolant
(only when engine has cooled down)
D Fill in the coolant slowly
D Make sure that all air can escape from
the cooling system
D Run the engine briefly and then check
coolant level once more
If, in an exceptional case, the coolant
level has to be checked in an engine that
has reached operating temperature, first
carefully turn the cap (large cap) with
safety valve to the first stop, let off pres-
sure, then open carefully.
Coolant must be added at the filler
neck only. Do not put cold coolant into an
engine which is warm from operation.
Ensure that the ratio of water to anti-
freeze is correct. Find the cause of the
loss of coolant and have it eliminated.
Warning:
If the cap with the working valves is
opened, there is the risk that it will not
close tightly again afterwards. The ex-
cess pressure required in the system
will then no longer build up. Prema-
ture boiling occurs and coolant is lost.
To prevent damage to the engine
open this cap only in exceptional cir-
cumstances and fit a new one as
soon as possible.
Draining of coolant
Drain coolant as follows when cooling sys-
tem has cooled down:
D Remove cover from filler neck of surge
tank
D Remove drain plug in crankcase and oil
cooler housing
2268
Drain plug in oil cooler housing
Improper mixing of anti-freeze and corro-
sion inhibitors may lead to lime and corro-
sion deposits in the engine cooling system
which can jeopardize cooling efficiency.
In such cases it is necessary to clean the
cooling system at suitable intervals.
Cleaning the outside of the radiator
(wear goggles)
Extreme dirt deposits can clog the honey-
combs so that the remaining surface no
longer ensures sufficient cooling. In such
cases, the insects, dust etc. should be re-
moved from the honeycomb system of the
radiator block and the radiator itself then
cleaned with the cleansing agent HENKEL
P3-begesol. This cleansing agent is avail-
able from MAN in 10-kg cans under Part
No. 09.21002-0164.
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