Series 60 DDEC V Troubleshooting – Section 2.3 Lubricating Oil Diluted With Fuel Oil or Engine Coolant

Section 2.3
Lubricating Oil Diluted With Fuel Oil or Engine Coolant

To determine if lubricating oil is diluted with fuel oil or engine coolant is causing low oil pressure, perform the following steps:‪

1. Acquire a lubricating oil sample from the engine oil pan.
2. Visually examine lubricating oil sample for presence of engine coolant or fuel oil.
   1. If coolant or fuel oil are not present, check for a faulty oil pressure gage, refer to "2.4 Faulty Oil Pressure Gauge Sensor" .
   2. If water or fuel oil are present, refer to "2.3.1 Contaminated Lubricating Oil Resolution" .

Section 2.3.1
Contaminated Lubricating Oil Resolution

Perform the following steps to resolve contaminated lubricating oil:‪

1. Drain engine oil pan, refer to appropriate service manual, preventive maintenance chapter.
2. Refill engine crankcase with new oil; refer to appropriate service manual, preventive maintenance chapter.
3. Verify lubricating oil replacement; refer to "2.3.1.1 Test Replaced Lubricating Oil" .

Section 2.3.1.1
Test Replaced Lubricating Oil

Perform the following steps to determine if replaced lubricating oil resolved low oil pressure:‪

1. Install the Diagnostic Data Reader to the vehicles Display Data Line Adaptor, see Figure "Typical Display Data Line Adaptor" ; refer to OEM guidelines.
2. Start and run the engine speed at 1800 rpm.
3. Visually examine the DDR for oil pressure reading.
   1. If the DDR indicates oil pressure greater than or equal 241 kPa (35 psi) at 1800 rpm, shut down the engine and disconnect the DDR. No further troubleshooting is required.
   2. If the DDR indicates oil pressure less than 241 kPa (35 psi) at 1800 rpm, shut down the engine and disconnect the DDR. Check for faulty oil pressure gage; refer to "2.4 Faulty Oil Pressure Gauge Sensor" .