A Series Diesel Engine Troubleshooting Logic 38
Lubricating Oil Pressure Low
Cause
Correction
Low Oil Level
Check/Replenish Oil.
Refer to Page 116
OK
Check for a Severe External Oil Leak that
Could Reduce the Pressure.
Oil Viscosity Thin: Diluted or
Wrong Specification
Verify the Correct Oil is Being Used.
Check for Oil Dilution. Refer to
Troubleshooting Logic for Contaminated
Lube Oil. Refer to Page 44.
OK
Malfunctioning Pressure
Switch/Gage
Verify the Pressure Switch is Functioning
Correctly. Refer to Page 143
OK
Relief Valve Stuck Open
Check/Replace Valve.
Refer to Page 116
OK
Plugged Oil Filter
Change Oil Filter; Review Change Interval.
Refer to Page 117
OK
(Continued)
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