MTU 12 V 4000 M63 Specifiche Scaricare il pdf (Pagina 17)

Coolants 15

4 Coolants

General information

Coolant deﬁnition

Coolant = coolant additive (concentrate) + freshwater in the speciﬁed mixing ratio ready for use in the engine.

The corrosion-inhibiting effect of coolant is only ensured with the coolant circuit fully ﬁlled. The

only exception is Shell O il 9156, which maintains its corrosion-inhibiting character even when the

coolant was drained due to oil-ﬁlm formation in the circuit.

Apart from that, only the corrosion inhibitors approved for internal preservation of the coolant circuit

provide proper corrosion protection when the medium was drained.

The entire cooling system must be free of zinc components. This also applies to coolant

supply and return/drain lines as well as to storage bins.

Coolants must be prepared from suitable fresh water and an MTU-approved coolant additive.

Conditioning of the coolant takes place outside the engine.

Mixing of different coolant additives and supplementary additives is prohibited!

The conditions for the approval of coolant additives are speciﬁed in the following MTU works standards (MTL):

• MTL 5047: Emulsiﬁable corrosion-inhibiting oils

• MTL 5048: Corrosion-inhibiting antifreeze

• MTL 5049: Water-soluble corrosion inhibitors

Coolant manufacturers are informed in writing if their product is approved by MTU.

To prevent cooling system damage:

• When topping up (following loss of coolant) it must be ensured that not only water but also concentrate is

added. The speciﬁed antrifreeze and/or corrosion inhibitor concentration must be maintained.

• Do not use concentrations of corrosion-inhibiting additives exceeding 55% by volume (max. antifreeze

protection). Concentrations in excess of this reduce antifreeze protection and heat dissipation.

• The coolant must be free of oil residues.

• All corrosion inhibitors currently approved for internal coolant circuit preservation are water-soluble

and do not provide antifreeze protection. Make sure that the engine is stored safe from frost,

because a certain amount of coolant remains in the engine after draining.

Fresh water requirements

Only clean, clear water with values in accordance with t hose in the following table must be used

for preparing the coolant. If the limit values for the water are exceeded, hardness or mineral

content can be decreased by adding demineralized water.

Min. Max.

Total earth alkalines

(Water hardness)

0mmol/l

0°d

2.7 mmol/l

15°d

pH-value at 20 °C

6.5 8.0

Chloride ions 100 mg/l

Sulfate ions 100 mg/l

Anions total

200 mg/l

Bacteria, fungi, yeasts

are not permitted!

Common designations for water hardness in various countries:

TIM ID: 0000010136 – 007

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 107 108

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MTU 12 V 4000 M63 Specifiche Pagina 17

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