Turbocharger Is Surging; Table 29: Malfunction - Turbocharger Pumping; Table 30: Malfunction - Sporadic Surge Blows - ABB HT604877 Operation Manual

Operation Manual / A150-M56/66/57/67 - A155-M..
8 Eliminating malfunctions / 8.3 Turbocharger is surging
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.
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 29: 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 30: Malfunction – Sporadic surge blows
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Remedy
Clean (see chapter
ance work →58)
Clean/replace
Clean
Remedy
- -
HZTL4032_EN
Periodic mainten-
Rev.Q January 2021