Operation and maintenance manual

QSB4.5 and QSB6.7 Troubleshooting Symptoms Charts
Section TS - Troubleshooting Symptoms Page TS-57
Lubricating Oil Pressure High
Cause Correction
STEP 1
Coolant temperature is above specification
.............
Refer to the Coolant Temperature Below Normal
symptom tree.
OK
Go To Next Step
STEP 2
Lubricating oil does not meet specifications for
operating conditions
.............
Change the oil and filters. Refer to Section 5. Use
the oil recommended in Section V.
OK
Go To Next Step
STEP 3
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.
OK
Go To Next Step
STEP 4
Electronic fault codes are active
.............
For instructions on how to read active fault codes,
refer to Section 1. If fault codes are active, contact
a Cummins Authorized Repair Facility.
OK
Go To Next Step
STEP 5
Contact a Cummins® Authorized Repair Facility