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Troubleshooting
Generates White Smoke
Clogged or deformed oil return pipe causing oil flow to the
blower on the turbine side
Excessive bearing wear causing abnormal wear or damage of
the seal ring
Sudden Oil Decrease
Excessive bearing wear causing abnormal wear or damage of
the seal ring
Decrease in Output
Gas leak from any part in exhaust piping
Air leak from discharge side of blower
Clogged air cleaner element
Damaged turbocharger
Poor (Slow) Response (Starting) of
Turbocharger
Hard carbon deposit on the turbine side (wheel sealing portion)
causing abnormal revolution of the turbine shaft
Incomplete combustion
Abnormal Sound or Vibration
Excessively narrowed gas path due to clogged nozzle in the
turbine wheel chamber or reverse flow of blower discharge in
acceleration (generally called surging)
Contact rotating part
Loosened intake, exhaust or oil pipe connection with the
turbocharger
Damaged bearing, contact between rotating part and adjacent
part, or chipping of the turbine wheel or blower vane due to
foreign matter within the turbocharger
Unbalanced rotating part
TNV DI Service Manual
Cause
Cause
Cause
Cause
Cause
Cause
Corrective action
Correct the condition
Repair the turbocharger. Send to a qualified repair facility.
Corrective action
Repair turbocharger. Send to qualified repair facility.
Corrective action
Correct the condition
Correct the condition
Clean or replace the air cleaner element
Repair the turbocharger. Send to a qualified repair facility
Corrective action
Repair the turbocharger. Send to a qualified repair facility
Correct the condition
Corrective action
Repair the turbocharger. Send to a qualified repair facility
Repair the turbocharger. Send to a qualified repair facility
Corrective action
Correct the condition
Repair the turbocharger. Send to a qualified repair facility
Repair the turbocharger. Send to a qualified repair facility
TURBOCHARGER
10-7
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Table of Contents
Troubleshooting
