8.
TURBOCHARGER 8.8.3 Sudden oil decrease 8.8.4 Decrease in output 8.8.5 Poor (slow) response (starting) of turbocharger 8.8.6 Abnormal sound or vibration (1) Abnormal sound generation (2) Vibration 82E-5 – 98E-5 SERIES 8-21 Cause Corrective action 1) Excessive bearing wear causing abnormal wear or damage of seal ring • Turbocharger disassembly and repair Cause Corrective action 1) Gas leak from any part in exhaust piping 2) Air leak from discharge side of blower 3) Clogged air cleaner element 4) Fouled or damaged turbocharger • Inspection and repair of defective portion • Element cleaning or replacement • Turbocharger disassembly and repair or replace- ment Cause Corrective action 1) Hard carbon deposit on the turbine side (wheel sealing portion) to make turbine shaft revolution heavy 2) Incomplete combustion • Turbocharger disassembly and washing with lubri- cating oil replacement • Engine combustion state inspection, followed by improvement of combustion to normal state Cause Corrective action 1) Excessively narrowed gas path due to clogged nozzle in turbine wheel chamber or reverse flow of blower discharge in acceleration (generally called surging) 2) Contact rotating part • Turbocharger disassembly and washing • Turbocharger disassembly and repair or replace- ment Cause Corrective action 1) Loosened intake, exhaust or oil pipe connection with the turbocharger 2) Damaged bearing, contact between rotating part and adjacent part, or chipping of turbine wheel or blower vane due to foreign matter invasion 3) Unbalanced rotating part • Turbocharger installation status check and repair of defective portion • Turbocharger disassembly with repair or replace- ment, or perfect removal of foreign matters in case of foreign matter invasion • Repair or replacement of rotating part