Operation Manual / A150-M56/66/57/67 - A155-M..
8 Eliminating malfunctions / 8.3 Turbocharger is surging
© Copyright 2021 ABB. All rights reserved. HZTL4032_EN Rev.Q January 2021
8.3 Turbocharger is surging
WARNING
Hot air escapes from the filter silencer
A surge blow is accompanied by a loud bang and escape of hot air from the
filter silencer. This may result in injury to personnel.
u Keep a distance from the filter silencer while the turbocharger is surging.
Turbocharger surges continuously or periodically
CAUTION
Continuous or periodic surging
If the turbocharger surges continuously or periodically, parts of the tur-
bocharger may be damaged.
u Gradually reduce the engine load.
u Have the cause clarified and remedied immediately by an ABB Turbochar-
ging Service Station.
u Have parts assessed for damage and, if necessary, replaced by an ABB
Turbocharging Service Station.
Possible causes Remedy
Turbocharger Filter silencer or diffuser contamin-
ated
Clean (see chapter Periodic mainten-
ance work →58)
Heavy contamination deposits in the
turbine or in the nozzle ring
Engine Protective grating in front of the tur-
bocharger contaminated or damaged
Clean/replace
Charge air
cooler
Cooler contaminated Clean
Charge air duct blocked
Table29: Malfunction – Turbocharger pumping
Sporadic surge blows
Possible causes Remedy
Engine Engine load reduced quickly when
manoeuvring.
When this happens, the flow direc-
tion in the compressor is momentar-
ily reversed. Such sporadic surge
blows do not impair the safe opera-
tion of the turbocharger.
- -
Table30: Malfunction – Sporadic surge blows
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