Symptom Tree t105
| Cause | Correction |
|---|
|
Lubricating oil level is above or below specification |
Check the oil level. Add or drain oil, if necessary. Refer to Procedure 007-025. Check the dipstick calibration. Refer to Procedure 007-009. |
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|
Lubricating oil pressure switch, gauge, or sensor is malfunctioning or is not in the correct location |
Check the oil pressure switch, gauge, or sensor for correct operation and location. Refer to the OEM service manual. |
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|
Lubricating oil leak (external) |
Inspect the engine for external oil leaks. Tighten the capscrews, pipe plugs, and fittings. Replace gaskets, if necessary. Refer to Section V for specifications. |
|
|
Lubricating oil filter is plugged |
Change the oil and filter. Refer to Procedures 007-013 and 007-025. Verify the oil change interval is correct. Refer to the operation and maintenance manual. |
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|
Lubricating oil is contaminated with coolant |
Check the lubricating oil for coolant. Refer to the Lubricating Oil Contaminated symptom tree. |
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|
Lubricating oil is thin or diluted |
Refer to Lubricating Oil System – Overview, Procedure 007-999. If the oil pressure is low, refer to the Lubricating Oil Pressure Low symptom tree. |
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|
Lubricating oil temperature is above specification |
Refer to the Lubricating Oil Temperature Above Specification symptom tree. |
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|
Lubricating oil does not meet specifications for operating conditions |
Change the oil and filters. Refer to Procedures 007-013 and 007-025. Use the oil type recommended in Section V of the operation and maintenance manual. |
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|
Lubricating oil cooler is plugged |
Check the oil cooler. Refer to Procedure 007-003. |
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|
Lubricating oil pump is malfunctioning or the o-rings are damaged |
Inspect the lubricating oil pump and o-rings. Refer to Procedure 007-031. |
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Lubricating oil suction or transfer tube is loose or broken, or the gasket or o-rings are leaking |
Remove and inspect the oil pan or suction tube. Refer to Procedure 007-025. |
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|
Main oil pressure regulator is malfunctioning |
Check the main oil pressure regulator assembly. Refer to Procedure 007-029. |
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|
Main bearing capscrews are loose, worn or not tightened correctly |
Check the torque on the main bearing capscrews. Inspect the capscrews for wear. Refer to Procedure 001-006. |
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|
Main bearings are damaged or worn, or the wrong bearings are installed |
Inspect the main bearings for damage, excessive wear, and the correct part number. Refer to Procedure 001-006. |
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|
Camshaft journals and number 1 bushing are severely damaged |
Inspect the camshaft journals and number 1 bushing for wear. Refer to Procedure 001-008. |
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|
Internal engine damage |
Analyze the oil and inspect the filters to locate an area of probable damage. Refer to Procedure 007-083. |
