
86 Preservation specifications
• Crankcase vent (with venting to atmosphere)
• Coat or spray non-painted parts with corrosion inhibitor for external preservation in accordance with Chapter 8.
• Seal check sheet in a clear plastic envelope and attach to engine at a clearly visible location.
• Complete the check sheet after completion of preservation work.
• Seal supply and drain lines of:
• Coolants
• Fuel
• Engine oil
The preservation work must be recorded in the check sheet (→ Page 98). For engines put into storage
under manufacturer’s warranty, the monitoring card (→ Page 99) must be fi lled out and returned to MTU
Friedrichshafen GmbH in good time before the engine is put into service.
If the engine cannot be properly accessed to carry out preservation work (e.g. charge-air pipe inaccessible) then the
engine must be removed and mounted on a ground run base or a test stand while preservation is completed.
Note on commissioning:
Before putting into to service, the engine must be depreserved, see Section "Depreserving
diesel and gas engines before putting into service"
Preserving gas engines
Out-of-service period of < 3 months
The same specifications as for preservation or represervation of diesel engines apply.
The following section lists deviations from the above-named specifications.
Preservation of cooling system and lubrication system of field engines with out-of-service period > 3 months
• Clean engine if necessary.
• Drain engine oil.
• Fill with initial operation corrosion-inhibiting oil in accordance with Chapter 8 up to the “Min” mark at least
• When using a corrosion inhibiting antifreeze, leave it in the system; otherwise, drain coolant and fill the
system in accordance with Chapter 8 with approved corrosion-inhibiting antifreeze, if freezing temperatures
are expected. If there is no risk of frost, the customer’s coolant can be left in the system.
• Run the engine for 15 minutes at half load.
• Stop the engine
• Leave corrosion inhibiting antifreeze or the customer’s coolant in the system.
• Drain initial operation c orrosion inhibitor oil.
If it is not possible to leave the coolant in the cooling circuit, drain the coolant and proceed as follows:
• Clean engine if necessary.
• Drain engine oil
• Fill cooling circuit completely with approved corrosion inhibitor for internal preservation of the coolant circuit
(further on referred t o as "preservation liquid") in accordance with the instructions in Chapter 8.
• Fill with initial operation corrosion-inhibiting oil in accordance with Chapter 8 up to the “Min” mark at least
• Run the engine for 15 minutes at half load.
• Stop the engine
• Allow engine to cool down, where possible, to max. 40 °C.
• Drain the inhibitor concentrate.
• Drain initial operation c orrosion inhibitor oil.
Note regarding the cooling circuit:
To avoid time-consuming fl ushing cycles when filling the coolant system after engine preservation with
emulsion-type preservatives, we recommend to use Glysacorr P 113 as preservation liquid.
Represervation is not required if the engine is completely filled with coolant after the preservation run.
Preservation of combustion chambers of field engines with out-of-service period > 3 months
• Clean engine if necessary.
• Drain engine oil.
• Fill with initial operation corrosion-inhibiting oil up to the “Min” mark at least.
• Remove sealed covers from combustion-air inlet and exhaust outlet.
• Clear access to the charge-air pipe. This may require removal of the flame-start canisters,
sensors, covers or pipes. Access to the charge-air pipe must be available after the intercooler,
after the pressure fine filter / air filter and after the turbocharger.
A001061/34E 09-11 ©MTU
TIM ID: 0000010139 – 007
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