ABB HT611036 - Turbocharger Is Surging; Table 31: Malfunction - Turbocharger Surging; Table 32: Malfunction - Sporadic Surge Blows

Operation Manual / A150-M56/66/57/67 - A155-M..
8 Eliminating malfunctions / 8.3 Turbocharger is surging
© Copyright 2022 ABB. All rights reserved. HZTL4032_EN Rev.S February 2022
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.
u While the turbocharger is pumping, keep a distance from the air inlet.
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 a Turbo Systems
service station.
u Have parts assessed for damage and, if necessary, replaced by a Turbo
Systems service station.
Possible causes Remedy
Turbocharger Filter silencer or diffuser contamin-
ated
Clean (see chapter Periodic mainten-
ance work →59)
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31: Malfunction – Turbocharger surging
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32: Malfunction – Sporadic surge blows
Page 86 / 198