To determine if the fuel pump is causing starting difficulty, perform the following steps:
- Insert a piece of wire through the pump flange drain hole, see Figure
"Fuel Pump Flange Drain Hole Location"
Figure 1. Fuel Pump Flange Drain Hole Location
- Crank the engine momentarily and feel for wire vibration.
- If the wire did not vibrate, determine if the drive hub or coupling should be replaced; refer to "17.10.1 Drive Hubs and Coupling Replacement" .
- If the wire did vibrate, check for aerated fuel; refer to "17.11 Aerated Fuel" .
Drive Hubs and Coupling Replacement
Perform the following for drive hub or coupling replacement:
- Replace the drive hub or coupling; refer to "2.6 Fuel Pump Drive" . Shut the engine down.
- Test the engine to determine if starting has been improved; refer to "220.127.116.11 Engine Test with Replaced Drive Hubs or Replaced Coupling" .
Engine Test with Replaced Drive Hubs or Replaced Coupling
Perform the following to determine if replaced drive hubs or coupling resolved starting difficulty:
- Attempt to start and run the engine.
- If the engine starts and runs, no further troubleshooting is required.
- If the engine fails to start and run, check for air in fuel; refer to "17.11 Aerated Fuel" .
|Series 50 Service Manual - 6SE50|
|Generated on 10-13-2008|