Operation and maintenance manual

Troubleshooting Symptoms Charts QSB4.5 and QSB6.7
Page TS-14 Section TS - Troubleshooting Symptoms
Coolant Temperature Above Normal - Gradual Overheat
Cause Correction
STEP 10
Coolant temperature gauge is malfunctioning
.............
Test the temperature gauge. Repair or replace the
gauge, if necessary.
OK
Go To Next Step
STEP 11
Fan drive belt is loose, tight, or not in alignment
............. Check the fan drive belt. Refer to Section 4.
OK
Go To Next Step
STEP 12
Vehicle cooling system is not adequate
.............
Verify that the engine and vehicle cooling systems
are using the correct components. Refer to the
OEM specifications.
OK
Go To Next Step
STEP 13
Contact a Cummins® Authorized Repair Facility