roubleshooting Symptoms Charts
B3.9 and B5.9 Series Engines
Section TS - Troubleshooting Symptoms
Lubricating Oil Pressure Low
This is symptom tree T105.
Check and replenish lubricating oil. Refer to
Lubricating oil level is low
ylinder head core and expansion plugs
Check cylinder head. Refer to Procedure
leaking or misassembled
ubricating oil filter is diluted
Change the oil and filter. Refer to Procedures
007-025 and 007-013. Review the oil change
ubricating oil filter is plugged
interval. Refer to the operation and mainte-
ubricating oil pressure switch, gauge, or
Check the oil pressure switch, gauge, or
sensor for correct operation and location. Refer
sensor is malfunctioning or is not in the
to Procedure 007-052.
Make sure the correct oil filter is being used.
Refer to the Operation and Maintenance
ubricating oil filter is not correct
Manual, B Series Engines, Bulletin No.
Check and replace valve. Refer to Procedure
ressure regulator valve struck open
Check the oil cooler. Refer to Procedure
ubricating oil cooler is plugged
ubricating oil cooler was replaced with
Check and remove shipping plugs.
shipping plugs left in cooler