Mothballing Turbocharger; Taking Out Of Operation For Up To 12 Months - ABB HT575645 Operation Manual

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Mothballing turbocharger

Taking out of operation for up to 12
months
Mothballing turbocharger

Taking out of operation for up to 12 months

Condition of engine lubricating oil
The turbocharger normally remains mounted on the engine. Mothballing a
turbocharger depends on the condition of the lubricating oil:
 If the total acid number (TAN) is lower than 2 mg KOH/g, no measures
have to be taken.
 If the engine lubricating oil is replaced by preserving oil before taking
the engine out of operation and this is circulated by the prelubrication
pump, no measures have to be taken. Any remaining old engine oil will
thus be flushed away and the bearing sections largely protected
against corrosion.
Mothballing measures
If the total acid number (TAN) is greater than 2 mg KOH/g, the following
mothballing measures are necessary after taking an engine out of opera-
tion:
Remove turbocharger.

Rotor and bearing parts must be removed by an official ABB Turbo-

charging service station and refitted afterwards.
Clean all parts.

Oil machined, bright surfaces of steel and cast parts using anticorro-

sive oil.
Reassemble complete turbocharger.

Rotor turns in stack draught
If the rotor turns as a result of the stack draught:
Install blind flange between compressor casing outlet flange and

charge air duct.
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