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SERIES 60 RESTRICTED OIL COOLER

To determine if a restricted oil cooler is causing low oil pressure, perform the following steps: ‪

  1. Install the Diagnostic Data Reader to the vehicles Display Data Line Adaptor, see Figure 24089 ; refer to OEM guidelines.
  2. Start and run the engine at 1800 r/min.
  3. Run the engine at 1800 r/min with a no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range, 88 - 96C (190 - 210F).
    1. If the DDR is indicating a lubricating oil temperature less than or equal to 110C (230F). Shut down the engine, disconnect the DDR, and check pressure regulator valve; refer to section .
    2. If the DDR is indicating a lubricating oil temperature greater than 110C (230F). Shut down the engine and repair oil cooler; refer to section .

Oil Cooler Repair

Perform the following steps to repair the oil cooler: ‪

  1. Remove and repair oil cooler, refer to section . Refer to section for pre-1991 oil coolers.
  2. Clean the oil cooler; refer to section or refer to section for pre-1991 oil coolers.
  3. Inspect the oil cooler for damage; refer to section or refer to section for pre-1991 oil coolers.
  4. Install repaired oil cooler; refer to section or refer to section for pre-1991 oil coolers.
  5. Verify repair of oil cooler; refer to section .
Test Engine with Repaired Oil Cooler

Perform the following steps to determine if oil cooler repair 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. Refer to section for the exhaust caution before preceeding. Start and run the engine at 1800 r/min.
  3. Run the engine through its operating range with no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range, 88 - 96C (190 - 210F).
    1. If the DDR is indicating a lubricating oil temperature less than or equal to 110C (230F) at 1800 r/min, disconnect the DDR and shut down the engine. No further troubleshooting is required.
    2. If the DDR is indicating a lubricating oil temperature greater than 110C (230F) at 1800 r/min, shut down the engine and disconnect the DDR. Check pressure regulator valve; refer to section .