Series 60 DDEC V Troubleshooting

Section 6.4 Defective Air Compressor

Section 6.4
Defective Air Compressor

To determine if a defective air compressor is causing excessive oil consumption, perform the following: ‪

  1. Perform a crankcase pressure test and record the test results. refer to appropriate service manual, preventive maintenance chapter. For crankcase pressure guidelines refer to Service Information Letter 02 TS-20 found on the DDC extranet.
  2. Disconnect the air outlet line from the air compressor; see Figure "Air Compressor Air Outlet Line" ; refer to appropriate service manual, special equipment chapter.
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    Figure 1. Air Compressor Air Outlet Line

  3. Repeat step 1 and record the test results.
  4. Compare the results of test one with test two.
    1. If the engine crankcase pressure remained the same, check the turbocharger; refer to "6.5 Defective Turbocharger" .
    2. If the engine crankcase pressure decreased, replace the air compressor; refer to "6.4.1 Air Compressor Removal" .

Section 6.4.1
Air Compressor Removal

Perform the following steps to remove the defective air compressor:‪

  1. Remove the air compressor from the engine; refer to appropriate service manual, special equipment chapter.
  2. Disassemble and repair the air compressor; refer to OEM guidelines.
  3. Install the repaired air compressor to the engine; refer to appropriate service manual, special equipment chapter.
  4. Verify repair of the air compressor; refer to "6.4.1.1 Test Engine with Repaired Air Compressor" .
Section 6.4.1.1
Test Engine with Repaired Air Compressor

Perform the following steps to determine if the repaired air compressor resolved the excessive crankcase pressure:‪

  1. Start and run the engine.
  2. Perform a crankcase pressure test. Refer to appropriate service manual, preventive maintenance chapter. For crankcase pressure guidelines refer to Service Information Letter 02 TS-20 found on the DDC extranet.
    1. If the engine crankcase pressure exceeds 1.25 kPa (5 in. H2 O), refer to "6.5 Defective Turbocharger" . Shut down the engine.
    2. If the engine crankcase pressure is within 1.25 kPa (5 in. H2 O), shut down the engine; no further troubleshooting is required.


Series 60 DDEC V Troubleshooting Guide - 6SE570
Generated on 10-13-2008

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