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SERIES 50 OBSTRUCTION OR DAMAGE TO ROCKER COVER BREATHER

To determine if an obstructed or damaged breather is causing excessive crankcase pressure, perform the following: ‪

  1. Perform a crankcase pressure test; refer to Section .
    1. If the engine crankcase pressure is less than 3 in. H2 O (0.75 kPa), check the air compressor; refer to Section .
    2. If the engine crankcase pressure is greater than 3 in. H2 O (0.75 kPa), replace wire mesh element; refer to Section .

Rocker Cover Breather Resolution

Perform the following steps to replace wire mesh element replacement: ‪

  1. Remove the valve rocker cover(s); refer to Section .
  2. Remove the wire mesh form the rocker cover; refer to Section .
  3. Install a new wire mesh element to the rocker cover; refer to Section .
  4. Install the rocker cover to the engine; refer to Section .
  5. Verify replacement of wire mesh element; refer to Section .
Test Engine with New Wire Mesh Element

Perform the following steps to determine if the new wire mesh element resolved the excessive crankcase pressure: ‪

  1. Start and run the engine.
  2. Perform a crankcase pressure test; refer to Section .
    1. If the engine crankcase pressure is less than 3 in. H2 O (0.75 kPa), no further troubleshooting is required. Shut the engine down.
    2. If the engine crankcase pressure is greater than 3 in. H2 O (0.75 kPa), check the air compressor; refer to Section .