Symptom Tree t047
| Cause | Correction |
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Lubricating oil pressure is below specification |
Check the oil pressure. If the pressure is low, refer toLubricating Oil Pressure Low symptom tree in the Troubleshooting and Repair Manual B3.9, B4.5, and B5.9 Series Engines, Bulletin 3666087, Troubleshooting and Repair Manual C Series Engines, Bulletin 3666003. Refer to Procedure 1-18 in the Troubleshooting and Repair Manual NT 855 Engines, Bulletin 3810298, Procedure 1-21 in the Troubleshooting and Repair Manual N14 Engine, Bulletin 3666142, or Procedure 1-23 in the Troubleshooting and Repair Manual, K38 and K50 Series Engines, Bulletin 3810432. |
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Coolant temperature is above specification |
Refer to the Coolant Temperature is Above Normal symptom tree in the Troubleshooting and Repair Manual B3.9, B4.5, and B5.9 Series Engines, Bulletin 3666087, Troubleshooting and Repair Manual C Series Engines, Bulletin 3666003, Troubleshooting and Repair Manual NT 855 Engines, Bulletin 3810298, Troubleshooting and Repair Manual N14 Engine, Bulletin 3666142, or the Troubleshooting and Repair Manual, K38 and K50 Series Engines, Bulletin 3810432. |
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Fan drive belt is loose, tight, or not in alignment |
Check the fan drive belt. Refer to Procedure 008-002 in the Troubleshooting and Repair Manual B3.9, B4.5, and B5.9 Series Engines, Bulletin 3666087, Procedure 008-002 in the Troubleshooting and Repair Manual C Series Engines, Bulletin 3666003. Refer to Procedure 1-18 in the Troubleshooting and Repair Manual NT 855 Engines, Bulletin 3810298, Procedure 1-21 in the Troubleshooting and Repair Manual N14 Engine, Bulletin 3666142, or Procedure 1-23 in the Troubleshooting and Repair Manual, K38 and K50 Series Engines, Bulletin 3810432. |
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Engine mounts are worn, damaged, or not correct |
Check the engine mounts. Refer to the OEM service manual. |
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Ignition system is malfunctioning or misfiring |
Check the ignition system. Refer to Procedure 013-012, 013-014 or 013-016 and the Ignition System OEM Literature. |
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Overhead adjustments are not correct |
Measure and adjust the overhead settings. Refer to Procedure 003-004 in the Troubleshooting and Repair Manual B3.9, B4.5, and B5.9 Series Engines, Bulletin 3666087, Procedure 003-004 in the Troubleshooting and Repair Manual C Series Engines, Bulletin 3666003. Refer to Procedure 7-04 in the Troubleshooting and Repair Manual NT 855 Engines, Bulletin 3810298, Procedure 7-04 in the Troubleshooting and Repair Manual N14 Engine, Bulletin 3666142, or Procedure 7-05 in the Troubleshooting and Repair Manual, K38 and K50 Series Engines, Bulletin 3810432. |
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Combustion knocks |
Refer to Engine Noise – Combustion Knock symptom tree. |
