Defective Oil Pump Assembly
To determine if a defective oil pump is causing low oil pressure, perform the following:
- Remove the oil pump assembly; refer to "3.2.2 Cleaning and Removal of Oil Pump" .
- Manually rotate the oil pump drive gear.
- If the drive gear rotates freely in the pump housing, call Detroit Diesel Technical Service Group.
- If the drive gear did not rotate freely; refer to "26.13.1 Oil Pump Assembly Repair" .
Oil Pump Assembly Repair
Perform the following steps to repair the oil pump assembly:
- Disassemble the oil pump assembly and replace worn or damaged components as required; refer to "3.2.3 Disassembly of Oil Pump" .
- Reassemble the oil pump; refer to "3.2.4 Assembly of Oil Pump" .
- Verify oil pump repair; refer to "126.96.36.199 Test Engine with Repaired Oil Pump Assembly" .
Test Engine with Repaired Oil Pump Assembly
Perform the following to determine if repaired relief valve resolved low oil pressure:
- Install the Diagnostic Data Reader to the vehicles Display Data Line Adaptor, see Figure "Typical Display Data Line Adaptor" ; refer to OEM guidelines.
- Start and run the engine speed at 1800 r/min.
- Visually examine the DDR for oil pressure reading.
- If the DDR indicates 241 kPa (35 lb/in.2 ), at 1800 r/min, shut down the engine and disconnect the DDR. No further troubleshooting is required.
- If the DDR indicates less than 241 kPa (35 lb/in.2 ), at 1800 r/min, shut down the engine and disconnect the DDR; call Detroit Diesel Technical Service Group.
|Series 50 Service Manual - 6SE50|
|Generated on 10-13-2008|