MTU 12 V 4000 M63 Especificaciones descargar pdf (Pagina 92)

90 Preservation speciﬁcations

Note:

If the laminated aluminum foil is replaced or repaired following damage, the calculation for the desiccant

required (DU) must be carried out again as follows (example) .

Calculation example for desiccant units

Determination of DU for the seaworthy transport of an engine to Singapore:

• Laminated aluminum foil surface 10 m²

• Packing material: 3 kg

• Packing for climatic zone C:

17 DU/m² laminated aluminum foil x 10 m²

170

20 DU/kg

x3kg

Total 230 DU

Result: Sufﬁcient protection of the engine requires 230 desiccant units (DU).

Humidity indicator

Humidity indicators can be inserted into the foil envelope to show the saturation level of the desiccant. The

indicators signalize by changing color that the speciﬁed level of r elative humidity has been exceeded. An increase

in relative humidity e.g. due to leaks or damage, presents a risk of corrosion for t he engine.

A viewing window with a humidity indicator is screwed into the laminated aluminum foil at a point

as far away as possible from the desiccant. It is thus possible to check the relative humidity

inside the foil envelope and / or to verify any changes.

The humidity must be checked regularly every 3 to 4 months.

Action

Colored pink:

Relative humidity above

30%.

Reduce time between

checks, i.e. check every

4 weeks.

Colored pink:

Relative humidity above

40%

The desiccant must be

replaced (→ Page 97);

evenly distribute the new

desiccant primarily in

the upper section of the

packaging. For required

units of desiccant for

special packing , see

calculation example for

desiccant units.

Colored pink:

Relative humidity above

50%

Check condition

of packed engine,

represerve engine,

(→ Page 87)and repack

engine (→ Page 91)

Note:

The humidity indicator regenerates itself; replacement is not necessary.

Order numbers for packing materials

Details required when ordering from MTU Friedrichshafen GmbH:

MTU No. 20447 Humidity indicator

MTU No. 20448 Viewing window

MTU-No. 49542 desiccant 125 g = 4 units

TIM ID: 0000010139 – 007

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