Operation Manual / TPL73-B.. - 85-B11/ -B12
10 Preserving turbocharger / 10.1 Taking out of operation for up to 12
months
© Copyright 2018 . All rights reserved. HZTL2480_EN Revision D July 2018
10 Preserving turbocharger
10.1 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 meas-
ures 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 prelubrica-
tion pump, no measures have to be taken. Any remaining old engine
oil will thus be flushed away and the bearing sections largely protec-
ted 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:
u Remove turbocharger.
u Rotor and bearing parts must be removed by an official ABB Tur-
bocharging service station and refitted afterwards.
u Clean all parts.
u Oil machined, bright surfaces of steel and cast parts using anticorros-
ive oil.
u Reassemble complete turbocharger.
Rotor turns in stack draught
If the rotor turns as a result of the stack draught:
u Install blind flange between compressor casing outlet flange and
charge air duct.
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