Specifications

Preservation Specifications 91

As a consequence of the resulting pressure drop,

the envelope must shrink into light contact with

the engine. Excessively heavy contact must be

avoided as friction damage could result during

transportation.

Note:

When the air is extracted, the air humidity is eliminated, thus ensuring a favorably low initial level of

moisture in the packaging. Extraction of the a ir also verifies that the envelope is free of leaks. If the

envelope is not adequately sealed, it will re-expand within 30 minutes.

A leak can be found by pressurizing the envelope and repaired by welding.

Special packing checks

Humidity check

Humidity within the envelope must be checked regularly every 3–4months(→ Page 84). The results of the

check must be entered on the monitoring sheet (→ Page 94). If the engine is still under warranty, return the

monitoring sheet (→ Page 94) to MTU Friedrichshafen after putting the engine into service.

Attention!

When checking the special packing, ensure that the laminated aluminum foil is not damaged, exercise

great care when opening the transportation box (if provided).

The condition of the laminated aluminum foil is to be checke

d minutely at every customs, stock or storage

check. Protection against corrosion is not guaranteed if the aluminum composite foil is damaged.

Desiccant replacement

Open the upper section of the envelope and remove the old desiccant. Place the same amount of fresh desiccant in

the upper section of the envelope (→ Page 89). Re-weld the envelope and extract the air (→ Page 90).

Repair of special packing

If the laminated aluminum foil is damaged, the damaged area can be cut out and a new section welded into

position. If repairs have to be carried out, the envelope must be stocke

d with fresh desiccant (→ Page 89) and

the air must be extracted again (→ Page 90). Incorrect repair, e.g. using adhesive tape, is not permissible,

as the partial vacuum in the envelope cannot be maintain

ed. In order to ensure correct repair, the specified

packing materials (→ Page 84) and the manual welding unit (→ Page 92) must be used.

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