MTU 12 V 4000 M63 Specifikace stáhnout pdf (Strana 18)

16 Coolants

1mmol/l = 5.6°d = 100 mg/kg CaCO

• 1°d = 17.9 mg/kg CaCO

, USA hardness

• 1°d = 1.79° French hardness

• 1°d = 1.25° English hardness

Emulsiﬁable corrosion-inhibiting oils

Emulsions of MTU-approved corrosion-inhibiting oils (1.0 – 2.0% by volume) and suitable

fresh water provide adequate corrosion protection.

A 2% by volume concentration must be used for initial ﬁlling.

Some corrosion-inhibiting oils tend to foam if used with completely demineralized water. This can

be avoided by adding an appropriate quantity of harder water.

The required quantity of corrosion-inhibiting oil is best mixed in advance in a container with 4 to 5 t imes the amount

of fresh water and then added to the coolant when the engine is running at operating temperature.

In maintenance stations or multi-engine installations the complete amount of coolant required should be prepared

in a separate container, it can then be used for initial ﬁlling or replenishment as required.

Under unfavorable conditions, individual cases of bacterial attack may occur in the emulsiﬁable

corrosion-inhibiting oils. Treat the coolant emulsion with biocide in this case! refer to Chapter 10

(Flushing and cleaning speciﬁcations for engine coolant circuits).

Note:

Slight precipitation may occur where coolant emulsions are used. This is shown by a layer on the surface

of the coolant in the expansion tank. T his is of no signiﬁcance provided that the emulsion concentration

remains within the speciﬁed limit values. Change the coolant in the event of a sudden drop in coolant additive

concentration or if the additive is no longer absorbed. If necessary, the engine coolant chambers are to

be cleaned (see the Flushing and cleaning speciﬁcations for engine coolant circuits).

Only emulsiﬁable corrosion-inhibiting oils must be used in engines of the following series:

• Series 538

• Series 595

• Series 956 TB33 up to year of manufacture end of 2008 (see nameplate)

• 1163 -03

Emulsiﬁable corrosion-inhibiting oils must not be used in engines of the following series:

• Series 099

• Series 183

• Series 2000

• Series 396 TB (external charge air cooling with plate core heat exchanger)

• Series 396 TE (split-circuit cooling system)

• Series 4000

• Series 8000

Special approval presently in effect remain valid.

Emulsiﬁable corrosion-inhibiting oil m ust never be used for coolant temperatures >90 °C except

during test stand runs and test runs.

Corrosion-inhibiting antifreezes

These antifreezes are necessary for engines without heating facilities and operating i

n areas

where below-freezing temperatures may occur.

Provided that the speciﬁed concentrations are maintained, the MTU-approved corrosion inhibiting

antifreezes ensure adequate corrosion protection (see operational monitoring, permissible

concentration (→ Table Permissible concentrations on page 17)).

The corrosion inhibiting antifreeze concentration must be determined not o

nly in accordance with the minimum

anticipated temperatures but with the corrosion protection requirements also.

For approved coolant additives for the individual engine series, refer to Chapter 8 “ Approved ﬂuids and Lubricants".

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