3. Troubleshooting
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(III) Abnormal vibration
(IV) Noise
(V) Quick contamination of lubrication oil
(VI) Pulsation of intake air pressure
(VII) Others
No. Cause and effect Countermeasure
1 Broken turbine impeller. Replace.
2 Broken compressor impeller. Replace.
3 Deposit of oxidized deposit on turbine impeller. Remove and repair or replace.
4 Broken bearing. Replace.
5 Bent turbine shaft. Replace.
6 Loose fixed parts. Tighten.
No. Cause and effect Countermeasure
1 Damaged bearing. Replace.
2 Contact by revolving parts. Repair or replace.
3 Dirty or carbon deposit on turbine and
compressor.
Clean.
4 Invasion by foreign matter (at turbine entrance). Repair or replace.
5 Rapid change in load (surging). Stabilize the load or replace turbine nozzle.
No. Cause and effect Countermeasure
1 Gas invasion into bearing chamber. Repair.
2 Clogged seal air path. Clean.
3 Damaged seal ring. Replace.
4 Clogged pressure balance path. Clean.
No. Cause and effect Countermeasure
1 Uneven cylinder combustion. Adjust for uniform combustion.
2 Rapid change in load. Operate correctly.
3 Excessively dirty compressor side. Clean.
4 Too high intake air temperature. (a) Clean cooling fin.
(b) Make thermal insulation of exhaust pipe
complete.
(c) Provide the air from outside of engine room.
No. Cause and effect Countermeasure
1 Bearing seizure. Replace.
2 Water leak from exhaust opening. Replace.
3 Corrosion in compressor/turbine impeller or
bearing housing.
Increase the coolant temperature.
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