Series 60 DDEC V Troubleshooting – Section 2.13 Defective Oil Pump Assembly

Section 2.13
Defective Oil Pump Assembly

To determine if a defective oil pump is causing low oil pressure, perform the following steps:‪

1. Remove the oil pump assembly; refer to appropriate service manual, lubrication system chapter.
2. Manually rotate the oil pump drive gear.
   1. If the drive gear rotates freely in the pump housing, call the Detroit Diesel Customer Support Center 313–592–5800.
   2. If the drive gear did not rotate freely; refer to "2.13.1 Oil Pump Assembly Repair" .

Section 2.13.1
Oil Pump Assembly Repair

Perform the following steps to repair the oil pump assembly:‪

1. Disassemble the oil pump assembly and replace worn or damaged components as required; refer to appropriate service manual, lubrication system chapter.
2. Reassemble the oil pump; refer to appropriate service manual, lubrication system chapter.
3. Verify oil pump repair; refer to "2.13.1.1 Test Engine with Repaired Oil Pump Assembly" .

Section 2.13.1.1
Test Engine with Repaired Oil Pump Assembly

Perform the following steps to determine if repaired relief valve 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 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 less than 241 kPa (35 psi) at 1800 rpm, shut down the engine and disconnect the DDR; call Detroit Diesel Technical Service Group.