ABB A150-M67 Operation Manual page 93

Operation Manual / 4 Product description / A150-M56/66/57/67 -
A155-M..
7 Eliminating malfunctions / 7.3 Turbocharger is surging
7.3 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.
Keep a distance from the filter silencer while the turbocharger is surging.
u
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.
Gradually reduce the engine load.
u
Have the cause clarified and remedied immediately by an ABB Turbochar-
u
ging Service Station.
Have parts assessed for damage and, if necessary, replaced by an ABB
u
Turbocharging Service Station.
Possible causes
Turbocharger Filter silencer or diffuser contamin-
ated
Heavy contamination deposits in the
turbine or in the nozzle ring
Engine Protective grating in front of the tur-
bocharger contaminated or damaged
Charge air Cooler contaminated
cooler
Charge air duct blocked
Table 27: Malfunction – Turbocharger pumping
Sporadic surge blows
Possible causes
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 28: Malfunction – Sporadic surge blows
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Remedy
Clean (see chapter
ance work →39)
Clean/replace
Clean
Remedy
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HZTL4032_EN
Periodic mainten-
Rev.P March 2020