Series 50/60 DDEC Insufficient Fuel Flow Test
Perform the following steps to resolve the insufficient fuel flow:
- Replace the fuel filter(s).
Note: Always fill the filter(s) with clean fuel before installing. Turn the filter(s) until they contact the gasket fully. Then, turn them an additional two-thirds by hand.
- Inspect the fuel lines for restrictions due to pinching, kinking or other damage. If damage is found, repair as necessary; refer to OEM guidelines.
- Inspect the cylinder head for a correct restricted fitting. If an incorrect fitting is found, replace with a new fitting. See Additional Information (Shop Notes) of Section 2 of current Series 60 service manual (6SE483) or Series 50 service manual (6SE50).
- Inspect the fuel return check valve for restrictive movement, (see Section 2.1 of current service manual).
- Inspect the fuel pump drive assembly. If damage is found, repair as necessary. See current service manual.
- Verify repairs done to correct insufficient fuel flow.
Perform the following steps to test the engine:
- Start and run the engine.
- Run the engine at idle with a no-load for approximately five minutes, allowing the engine coolant to reach normal operating range, 88-96°C (190-210°F).
- If the engine is not running rough or stalling, no further troubleshooting is required. Shut down the engine.
- If the engine is running rough or stalling, shut down the engine. Check for high fuel oil temperature return, or air in the fuel. See current service manual.
|Unit Fuel Injectors and Unit Pumps Technician's Guide - 7SE500|
|Generated on 10-13-2008|