Operation Manual / A170-M.. - A175-M..
10 Taking a turbocharger out of operation / 10.2 Locking the rotor
© Copyright 2022 ABB. All rights reserved. HZTL4033_EN Rev.K January 2022
10.2 Locking the rotor
10.2.1 Introduction
CAUTION
Cooling of a locked rotor
Serious damage to engine or property can be caused by the overheating of
intact turbocharger components.
If the gas inlet is not blanked off, the lubricating oil supply remains switched
on (see section Further information for operation of 4-stroke engines with
locked rotor).
u If there is a lubricating oil leak on the turbocharger, stop the oil supply.
A locked rotor must be removed after emergency operation and checked for unbalance (see
chapter Removing the cartridge group).
The unbalance check must be carried out by an ABB Turbocharging Service Station.
Exception
The exception concerns customer requirements for test bed runs of new engines at a max-
imum engine load of up to 25 %.
In these cases, subsequent removal of the rotor is not required as the engine is only oper-
ated briefly with a locked rotor.
In these test bed runs, it is not allowed to remove any set screws from the compressor wheel
when fitting the locking device (see section Fitting the locking device →121).
Page 120 / 146
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