Series 60 – LOW OIL PRESSURE – IMPROPER ENGINE OIL LEVEL

To determine if improper engine oil level is causing low oil pressure, perform the following steps:
1. Ensure that the vehicle is parked on level ground.
2. Check the engine oil level; refer to appropriate service manual, preventive maintenance
chapter.
[a] If the engine oil level is correct, check lubricating oil viscosity; refer to section 2.2.
[b] If the engine oil level is incorrect, refer to section 2.1.1.
2.1.1
Low Engine Oil Level Resolution
Perform the following steps for low engine oil level:
1. Fill engine oil pan to correct level; refer to appropriate service manual, preventive
maintenance chapter.
2. Verify low engine oil resolution; refer to section 2.1.1.1.
2.1.1.1
Test for Proper Engine Oil Level
Perform the following steps to determine if properly filled oil pan resolved low oil pressure:
1. Connect Detroit Diesel Diagnostic Link (DDDL 7.0) to check the oil pressure.
2. Start and vary engine speed between 1800 – 2100 rpm.
3. Check DDDL 7.0 for oil pressure reading.
[a] If DDDL 7.0 indicates oil pressure greater than or equal 241 kPa (35 psi) at 1800
rpm, shut down the engine and disconnect DDDL 7.0. Refer to section 6 to diagnose
the cause for the low oil level.
[b] If DDDL 7.0 indicates oil pressure less than 241 kPa (35 psi), at 1800 rpm, shut
down the engine and disconnect DDDL 7.0. Check oil pressure using a mechanical
gage; refer to section 2.1.2.
2.1.2
Check Oil Pressure with a Mechanical Gauge
Check as follows:
1. Remove the oil pressure sending unit from the engine.
2. Connect a mechanical oil pressure gage to oil pressure sending unit port on the engine.
3. Start the engine. Verify that the engine speed is between 1800 and 2100 rpm.
[a] If the oil pressure is greater than or equal to 241 kpa (35 psi), refer to section 2.4.
[b] If oil pressure is less than 241 kpa (35 psi),refer to section 2.2.

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