A Series Diesel Engine Troubleshooting Logic 32
Coolant Temperature Above Normal
Cause Correction
Low Coolant Level
Check/Replenish Coolant.
Refer to Pages 54
OK
Locate and Correct the Source of the
Coolant Leak. Refer to Troubleshooting
Logic for Coolant Loss.
Incorrect/Malfunctioning Pressure
Cap
Replace Cap with the Correct Rating for
the System. Refer to Page 55
OK
High Lube Oil Level
Check/Drain Oil to Correct Level.
Refer to Page 116
OK
Loose Drive Belt on Water
Pump/Fan
Check/Correct Belt Tension.
Refer to Page 57, 62
OK
Inadequate Air Flow to the Radiator
Check/Repair Fan Shroud, Shutters, Fan
Sensors, and Fan Clutch as Required.
Refer to the Equipment Manufacturer’s
Procedures.
OK
Radiator Fins Plugged
Blow Debris from Fins.
OK
Collapsed Radiator Hose
Check/Replace Hose.
Refer to Page 58
OK
(Continued)
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