Symptom Tree t092
| Cause | Correction |
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Engine idle time is excessive |
Low oil and coolant temperatures can be caused by long idle time (greater than 10 minutes). Shut off the engine rather than idle for long periods. If idle time is necessary, raise the idle speed. |
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Injector o-rings are damaged or missing |
Remove and check the injectors. Replace the injector o-rings. Refer to Procedure 006-026 in the Troubleshooting and Repair Manual, ISC, QSC8.3, ISL, and QSL9 Series Engines, Engines, Bulletin 4021418. |
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Injector is malfunctioning |
Perform the automated cylinder performance test. Replace injectors as necessary. Refer to Procedures 006-026 or 014-008 in the Troubleshooting and Repair Manual, ISC, QSC8.3, ISL, and QSL9 Series Engines, Engines, Bulletin 4021418. |
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Fuel injection pump is malfunctioning |
Inspect the cam housing for cracks and damage. Refer to Procedure 005-088 in the Troubleshooting and Repair Manual, ISC, QSC8.3, ISL, and QSL9 Series Engines, Engines, Bulletin 4021418. |
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Fuel injection pump is malfunctioning |
Replace the accumulator module. Refer to Procedure 005-085 in the Troubleshooting and Repair Manual, ISC, QSC8.3, ISL, and QSL9 Series Engines, Engines, Bulletin 4021418. |
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Fuel injection pump is malfunctioning |
Inspect the injection pump gear pump module oil seal. Replace gear pump module if there are signs or leakage. Refer to Procedure 005-025 in the Troubleshooting and Repair Manual, ISC, QSC8.3, ISL, and QSL9 Series Engines, Engines, Bulletin 4021418. |
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Cylinder head is cracked or porous |
Remove intake and exhaust manifolds. Check for evidence of coolant leak. If necessary, operate engine at low idle. Pressure-test the cylinder head. Refer to Procedure 002-004 in the Troubleshooting and Repair Manual, ISC, QSC8.3, ISL, and QSL9 Series Engines, Engines, Bulletin 4021418. |
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Bulk oil supply is contaminated |
Check the bulk oil supply. Drain the oil and replace with noncontaminated oil. Replace the oil filters. Refer to Procedures 007-037 and 007-013 in the Troubleshooting and Repair Manual, ISC, QSC8.3, ISL, and QSL9 Series Engines, Engines, Bulletin 4021418. |
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Internal engine damage |
Analyze the oil and inspect the filters to locate an area of probable damage. Refer to an Authorized Cummins Repair Facility. |
