Operation and maintenance manual

QSB4.5 and QSB6.7 Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms Page TS-25
Engine Noise Excessive
Cause Correction
STEP 10
Fan is loose, damaged, or has excessive hub
bearing end clearance
............. Check the fan. Refer to Section 3.
OK
Go To Next Step
STEP 11
Contact a Cummins® Authorized Repair Facility