Operation Manual / Power2 800-M / 4 Product description
-pressure and high-pressure stage Page 51 /
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10 Mothballing the low-pressure and high-
pressure stage
10.1 Taking the engine out of operation for up to
12 months
State of the engine lubricating oil
The low-pressure and high-pressure stage normally remains attached to the engine. The
measures to be taken for mothballing of the low-pressure and high-pressure stage depend on
the state of the lubricating oil:
If the acid number (TAN) is less than 2 mg KOH/g, no measures need to be taken.
If the engine lubricating oil is replaced with a preservative oil and circulated with the pre-
lubrication pump before the engine is taken out of operation, no measures need to be taken
either. Residues of old engine oil are flushed away in this way and the bearing parts are
largely protected against corrosion.
Preparations for mothballing
If the acid number (TAN) is greater than 2 mg KOH/g, the following mothballing measures are
necessary after taking the engine out of operation:
Dismantle low-pressure and high-pressure stage
The rotor and bearing parts must be dismantled and subsequently refitted by an ABB
Turbocharging Service Station
Clean all parts
Coat plain surfaces of steel and cast parts with anticorrosive oil
Completely fit low-pressure and high-pressure stage.
Rotation of the rotor in the stack draught
If the rotor turns as a result of the stack draught:
Install a blind flange between the outlet flange of the compressor casing and the charge air
duct.
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