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SERIES 60 INOPERATIVE THERMO-MODULATED FAN

To determine if an inoperative thermo-modulated fan is causing high engine coolant temperature, perform the following: ‪

  1. Test the thermo-modulated fan; refer to OEM guidelines.
    1. If the thermo-modulated fan is functioning correctly, check thermostats; refer to section .
    2. If the thermo-modulated fan is not functioning correctly, refer to section .

Thermo-modulated Fan Replacement

Perform the following steps to replace inoperative thermo-modulated fan: ‪

  1. Replace inoperative thermo-modulated fan; refer to OEM guidelines.
  2. Verify thermo-modulated fan replacement; refer to section .
Test Engine with Replaced Thermo-modulated Fan

Perform the following to determine if thermo-modulated fan replacement resolved high engine coolant temperature: ‪

  1. Start and run the engine.
  2. Run the engine through its operating range with no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range.
    1. If the engine coolant temperature is 88-96C (190-210F), no further troubleshooting is required. Shut down the engine.
    2. If the engine coolant temperature is not 88-96C (190-210F), shut down the engine. Check thermostats; refer to section .