Series 50 – Section 26.1 Improper Engine Oil Level

Section 26.1
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 "13.5.1 Lubricating Oil" .
   1. If the engine oil level is correct, check lubricating oil viscosity, refer to "26.2 Improper Lubricating Oil Viscosity" .
   2. If the engine oil level is incorrect, refer to "26.1.1 Low Engine Oil Level Resolution" .

Section 26.1.1
Low Engine Oil Level Resolution

Perform the following steps for low engine oil level:‪

1. Fill engine oil pan to correct level; refer to "13.5.1 Lubricating Oil" .
2. Verify low engine oil resolution; refer to "26.1.1.1 Test for Proper Engine Oil Level" .

Section 26.1.1.1
Test for Proper Engine Oil Level

Perform the following to determine if properly filled oil pan 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.
   

   Figure 1. Typical Display Data Line Adaptor

2. Start and vary engine speed between 1800-2100 r/min.
3. Visually examine the DDR for oil pressure reading.
   1. If the DDR indicates oil pressure greater than 241 kPa (35 lb/in.² ), at 1800 r/min, 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 lb/in.² ), at 1800 r/min, shut down the engine and disconnect the DDR. Check lubricating oil viscosity; refer to "26.2 Improper Lubricating Oil Viscosity" .