A Series Diesel Engine Troubleshooting Logic 41
Lube Oil Loss
Cause
Correction
External Leaks
Visually Inspect for Oil Leaks.
Refer to Pages 55.
OK
Crankcase Being Overfilled
Verify that the Dipstick is Correctly
Marked.
OK
Incorrect Oil
(Specification or Viscosity)
Make Sure the Correct Oil is Being Used.
OK
Look for Reduced Viscosity from Dilution
with Fuel. Refer to Page 116
Review/Reduce the Oil Change Intervals.
Oil Cooler Leak
Check for Oil in the Coolant.
OK
If Equipped, Air Compressor
Pumping Oil
Check/Replace Air Compressor.
Refer to Page 94
OK
(Continued)
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