Section 21.6 Defective Turbocharger

Section 21.6
Defective Turbocharger

To determine if a defective turbocharger is causing excessive exhaust smoke, perform the following:

  1. Remove the turbocharger outlet line connected to the crankcase and place the drain line into a suitable container; refer to "6.5.2 Cleaning and Removal of Turbocharger" .
  2. Perform a crankcase pressure test, refer to "29.3 Crankcase Pressure Test (Governed Speed No Load)" .
    1. If the engine crankcase pressure is greater than 3 in. H2 O, replace the turbocharger; refer to "21.6.1 Turbocharger Replacement" .
    2. If the engine crankcase pressure is 3 in. H2 O, call the Detroit Diesel Technical Service Group.

Section 21.6.1
Turbocharger Replacement

Perform the following steps to replace a defective turbocharger:

  1. Remove defective turbocharger from the engine; refer to "6.5.2 Cleaning and Removal of Turbocharger" .
  2. Tag removed turbocharger for remanufacture.
  3. Install a new turbocharger to the engine; refer to "6.5.7 Installation of Turbocharger" .
  4. Verify replacement of new turbocharger; refer to "21.6.1.1 Test Engine with Replaced Turbocharger" .
Section 21.6.1.1
Test Engine with Replaced Turbocharger

Perform the following steps to determine if a replaced turbocharger resolved the excessive exhaust smoke condition:

  1. Start the engine.
  2. Run the engine speed to full load.
  3. Visually inspect the exhaust for excessive smoke.
    1. If the engine exhaust emission appears normal, no further troubleshooting is required. Shut the engine down.
    2. If the engine exhaust emission is excessive; call the Detroit Diesel Technical Service Group. Shut the engine down.


Series 50 Service Manual - 6SE50
Generated on 10-13-2008

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