Improper Grade of Fuel Oil
To determine if an improper grade of fuel oil is causing excessive black or gray smoke, perform the following:
- Acquire a fuel oil sample from the vehicle fuel tank(s).
- Submit fuel oil sample for an ASTM test analysis.
- If the fuel oil meets specifications, (refer to "29.6 Diesel Fuel Quality and Selection" ), check for a restrictive air cleaner; refer to "21.2 Restricted Air Cleaner Element" .
- If the fuel oil did not meet specifications, (refer to "29.6 Diesel Fuel Quality and Selection" ), resolve improper grade of fuel; refer to "21.1.1 Improper Grade of Fuel Resolution" .
Improper Grade of Fuel Resolution
Perform the following steps to resolve the improper grade of fuel oil:
- Drain the fuel oil tanks, refer to OEM guidelines, and dispose of properly.
- Refill the fuel oil tanks with new fuel oil having a cetane number greater than 40.
- Verify fuel oil resolution; refer to "188.8.131.52 Test the Engine with New Fuel Oil" .
Test the Engine
with New Fuel Oil
Perform the following steps to determine if the fuel oil refill resolved the excessive exhaust smoke condition:
- Start and run the engine.
- Run the engine at idle with a no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range.
- Visually inspect exhaust for excessive smoke.
- If the engine exhaust smoke emission appears normal, no further troubleshooting is required. Shut the engine down.
- If the engine exhaust smoke is excessively black or gray, shut the engine down. Check the air filter; refer to "21.2 Restricted Air Cleaner Element" .
|Series 50 Service Manual - 6SE50|
|Generated on 10-13-2008|