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SERIES 50 INSUFFICIENT RADIATOR AIR CIRCULATION

To determine if insufficient radiator air circulation is causing high engine coolant temperature, perform the following: ‪

  1. Visually examine the radiator and radiator shrouding.
    1. If the radiator is absent of clogging, debris, and dirt, check the pressure control cap; refer to Section .
    2. If the radiator has excessive clogging, debris, or dirt; refer to Section .
    3. If the radiator shrouding is not damaged, incorrectly positioned, or inadequate, check the pressure control cap; refer to Section .
    4. If the radiator shrouding is damaged, incorrectly positioned, or inadequate; refer to Section .

Exterior Radiator Repair

Perform the following for exterior radiator repair: ‪

  1. Clean the exterior radiator of all clogging, debris, or excessive dirt; refer to OEM guidelines.
  2. Verify exterior radiator repair; refer to Section .

Radiator Shroud Repair

Perform the following for radiator shroud repair: ‪

  1. Repair or replace damaged radiator shrouding; refer to OEM guidelines.
  2. Verify exterior radiator repair; refer to Section .
Test Engine with Repaired Exterior Radiator and Shrouding

Perform the following to determine if exterior radiator and shrouding repair 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 the engine down.
    2. If the engine coolant temperature is not 88-96C (190-210F), shut the engine down. Check the pressure control cap; refer to Section .