Series 50

Section 27.2 Insufficient Radiator Air Circulation

Section 27.2
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 "27.3 Faulty Pressure Control Cap" .
    2. If the radiator has excessive clogging, debris, or dirt; refer to "27.2.1 Exterior Radiator Repair" .
    3. If the radiator shrouding is not damaged, incorrectly positioned, or inadequate, check the pressure control cap; refer to "27.3 Faulty Pressure Control Cap" .
    4. If the radiator shrouding is damaged, incorrectly positioned, or inadequate; refer to "27.2.2 Radiator Shroud Repair" .

Section 27.2.1
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 "27.2.2.1 Test Engine with Repaired Exterior Radiator and Shrouding" .

Section 27.2.2
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 "27.2.2.1 Test Engine with Repaired Exterior Radiator and Shrouding" .
Section 27.2.2.1
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 88-96°C (190-210°F), no further troubleshooting is required. Shut the engine down.
    2. If the engine coolant temperature is not 88-96°C (190-210°F), shut the engine down. Check the pressure control cap; refer to "27.3 Faulty Pressure Control Cap" .


Series 50 Service Manual - 6SE50
Generated on 10-13-2008

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