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SERIES 50 FAN BELTS ARE INCORRECTLY ADJUSTED

To determine if misadjusted fan belts are causing high engine coolant temperature, perform the following: ‪

  1. Test fan belt(s) tension; refer to Section .
  2. Compare tension to belt specifications listed in Table .

    Single Belt

    2 or 3 Belts

    80-100 lbs (356-445 N) ‪

    60-80 lbs (267-356 N) ‪

    Fan Belt Tension
    1. If the belt(s) tension is within specification, check the thermo-modulated fan; refer to Section .
    2. If the belt(s) tension is not within specification, refer to Section .

Belt Tension Resolution

Perform the following steps to resolve incorrect belt tension: ‪

  1. Readjust belt(s) tension as necessary; refer to Section .
  2. Verify belt tension resolution; refer to Section .
Test Engine with Correct Belt Tension

Perform the following to determine if exterior radiator 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 thermo-modulated fan; refer to Section .