Lubricating Oil Pressure Low - Dodge D250 1990 Service Manual

Troubleshooting Logic
Page9A~26
Base Engine Components
DODGE Turbo Diesel
Lubricating Oil Pressure Low
Cause
Correction
Low Oil Level Check/Replenish Oil.
Check for a Severe External Oil Leak
that Could Reduce the Pressure.
Oil Viscosity Thin; Diluted or Wrong
Specification
OK
±
Malfunctioning Pressure Switch/Gage Verify the Pressure Switch is
Functioning Correctly.
OK
t
Relief Valve Stuck Open
Check/Replace Valve.
OK
*
Plugged Oil Filter
Change Oil Filter; Review Change
Interval.
OK
t
If Cooler was Replaced, Shipping
Check/Remove Shipping Plugs.
Plugs Left in Cooler
OK
t
If Replaced, Four Cylinder Lube Pump Verity that the Correct Pump is
Installed in a Six Cylinder Engine Installed.
Verify the Correct Oil is Being Used.
Check for Oil Dilution. Refer to
Troubleshooting Logic for
Contaminated Lube Oil.
OK
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