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SERIES 50 OIL PRESSURE GAGE LINE OBSTRUCTED

To determine if an oil pressure gage line obstruction is causing low oil pressure, perform the following: ‪

  1. Disconnect oil gage line from oil pressure gage; refer to OEM guidelines.
  2. Visually inspect oil gage line for obstructions.
    1. If no obstructions are found; check to determine if rocker arm shaft plugs are missing; refer to Section .
    2. If obstructions are found; refer to Section .

Obstructed Oil Pressure Gage Line Repair

Perform the following steps to resolve oil pressure gage line obstructions: ‪

  1. Remove oil pressure gage line; refer to OEM guidelines.
  2. Clean oil gage line by soaking in cleaning solution for 5 minutes.
  3. Blow out oil gage line of residue contamination with compressed air.
  4. Install cleaned oil gage line; refer to OEM guidelines.
  5. Verify oil gage line repair; refer to Section .
Test the Engine with Repaired Oil Gage Line

Perform the following to determine if replaced oil pressure gage resolved low oil pressure: ‪

  1. Install the Diagnostic Data Reader to the vehicles Display Data Line Adaptor, see Figure 24089 ; refer to OEM guidelines.
  2. Start and run engine speed at 1800 r/min.
  3. Visually examine the DDR for oil pressure reading.
    1. If the DDR indicates 241 kPa (35 lb/in.2 ) at 1800 r/min, shut down the engine and disconnect the DDR. No further troubleshooting is required.
    2. If the DDR indicates less than 241 kPa (35 lb/in.2 ) at 1800 r/min, shut down the engine and disconnect the DDR. Check for missing or damaged rocker arm shaft plugs; refer to Section .