A Series Diesel Engine Troubleshooting Logic 40
Lubricating Oil Pressure Too High
Cause
Correction
Malfunctioning Pressure
Switch/Gage
Verify the Pressure Switch is Functioning
Correctly. Refer to Page 143
OK
Engine Running Too Cold
Refer to Troubleshooting Logic for Coolant
Temperature Below Normal.
OK
Oil Viscosity Too Thick
Make Sure the Correct Oil is Being Used.
Refer to O&M Manual.
OK
Relief Valve Stuck Closed
Check/Replace Valve.
Refer to Page 116
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