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SERIES 60 DEFECTIVE COOLANT HOSES

To determine if defective coolant hoses is causing high engine coolant temperature, perform the following: ‪

  1. Visually examine cooling system hoses; refer to OEM guidelines.
    1. If cooling system hoses are not soft, deteriorated, or collapsed, check the fan belts; refer to section .
    2. If cooling system hoses are soft, deteriorated, or collapsed, refer to section .

Coolant System Hoses Replacement

Perform the following steps to resolve worn or damaged coolant system hoses: ‪

  1. Remove and replace damaged or worn coolant hoses as necessary; refer to OEM guidelines.
  2. Install new coolant hoses as necessary; refer to OEM guidelines.
  3. Verify replaced coolant system hoses; refer to section .
Test Engine with Replaced Coolant Hoses

Perform the following to determine if the new coolant hoses 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, and visually examine replaced hoses for any leaks.
    1. If the engine coolant temperature is 88-96C (190-210F) and no leaks are found, no further troubleshooting is required.
    2. If the engine coolant temperature is 88-96C (190-210F) and leaks are found, repair leaks; refer to section . Shut down the engine.
    3. If the engine coolant temperature is not 88-96C (190-210F) and no leaks are found, shut down the engine. Check fan belts; refer to section .