Turbocharger Is Surging; Table 31: Malfunction - Turbocharger Surging; Table 32: Malfunction - Sporadic Surge Blows - ABB HT611071 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 air inlet
A surge blow is accompanied by a loud bang and escape of hot air from the
air inlet. This may result in injury to personnel.
While the turbocharger is pumping, keep a distance from the air inlet.
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 a Turbo Systems
u
service station.
Have parts assessed for damage and, if necessary, replaced by a Turbo
u
Systems 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 31: Malfunction – Turbocharger surging
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 32: Malfunction – Sporadic surge blows
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Remedy
Clean (see chapter
ance work →59)
Clean/replace
Clean
Remedy
- -
HZTL4032_EN
Periodic mainten-
Rev.S February 2022