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B5.9G, B5.9LPG – Troubleshooting and Repair Manual – Lubricating Oil Pressure High

Symptom Tree  t104

This is symptom tree t104
Cause Correction

Lubricating oil pressure switch, gauge, or sensor is malfunctioning or is not in the correct location

Check the oil pressure switch, gauge, or sensor for correct operation and location. Refer to the OEM service manual.
 

Engine is cold

Allow the engine to warm to operating temperature. If the engine will not reach operating temperature, refer to the Coolant Temperature is Below Normal symptom tree.
 

Coolant temperature is below specification

Refer to the Coolant Temperature is Below Normal symptom tree.
 

Lubricating oil does not meet specifications for operating conditions

Change the oil and filters. Refer to Procedures 007-013, 007-025 and the Cummins Engine Oil Recommendations, Bulletin 3810340.
 

Lubricating oil temperature is below specification Procedures 007-013, 007-025 and the Cummins Engine Oil Recommendations, Bulletin 3810340

Install an oil pan heater, or drain the oil and fill the system with warm oil.

 

Main oil pressure regulator is malfunctioning

Check the main oil pressure regulator assembly. Refer to Procedure 007-029.

 
Last Modified:  05-Jan-2004
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