Specifications

Preservation Specifications 77
7 Preservation Specifications
Preliminary note
Please note the following warnings in bold type:
Caution!
Work which has to be carried out exactly in order to avoid danger to persons.
Attention!
Work which has to be carried out exactly in order to avoid damage or destruction of material.
Note:
If a particular aspect requires special attention while work is being carried out.
Introduction
The preservation and represervation specifications apply to all diesel and gas engines from MTU. They apply
to new engines direct from the test stand, to field engines in uninterrupted operation and to engines that have
been decommissioned for a scheduled major overhaul, provided that the period between the end of engine
operation and return to operation is more than 3 months and that storage conditions are normal. If storage
conditions are difficult or unsuitable, preservation must be carried out in any case.
Cooling circuits must always be preserved after the coolant has been drained irrespective of the storage conditions.
Preservation is carried out during the acceptance test on the test stand, or immediately after
it. Engines in the field must be preserved immediately after their last service period. The
represervation interval depends on the storage conditions.
A distinction is made between the following storage conditions:
normal
(free of frost, closed heated rooms, max. temperature fluctuations of between 10 and 40
°C, clean, monthly average relative air humidity ≤ 65%)
difficult (dust / contamination, with drops below dew point > 20% of the month, monthly average
relative air humidity > 65%)
unsuitable
(salt-laden air, outdoor storage)
The following p ackaging and represervation intervals b ased on the above:
normal storage conditions:
Standard packaging, represervation every 12 months
difficult storage conditions: Standard packaging, represervation every 6 months
unsuitable storage conditions:
Special packaging, represervation every 12 months, additionally every 3 – 4
months a check of the humidity indicator in the special packaging
The preservation or represervation agent is the same for all engine types. The type of engine packaging
depends on the storage and transport conditions. The gearbox manufacturer’s preservation specifications
must also be complied with when complete powerpacks / drive systems are be preserved.
Note:
Warranty claims are invalid if the storage is not according to specifications.
Do not use natural rubber sealing material, as it is not resistant to aging.
Only MTU-approved fluids and lubricants as specified in Chapter 6 (Approved Fluids and Lubricants)
are to be used for preservation and represervation (→ Page 37).
In event of extended out-of-service periods, machined, non-protected surfaces, for example cylinder liner
running faces, are susceptible to corrosion and must therefore be preserved.
The applicable engine documentation must also be considered together with this Preservation
Specification. Refer to the engine documentation for tasks and checks to be carried out when
shutting down an engine and before re-operating an engine.
A001061/33E 08-01 ©MTU
TIM ID: 0000010139 – 006