Incorrectly Adjusted Exhaust Brake Valve
To determine if a misadjusted exhaust brake valve is causing excessive black or gray smoke, perform the following:
- Readjust the exhaust brake gate; refer to MBE 4000 Service Manual) (6SE420, Chapter 7, “Exhaust System – Brake Gate”.
- Verify the adjustment on the exhaust brake gate; refer to "9.10.1 Test Engine After Adjusting the Exhaust Brake Gate" .
Test Engine After Adjusting the Exhaust Brake Gate
Perform the following steps to determine if the exhaust brake adjustment resolved the excessive exhaust smoke condition:
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked.
- Start and run the engine.
- Run the engine at idle under no-load conditions for approximately five minutes, allowing the engine coolant to reach normal operating range, approximately 88-96°C (190-205°F).
- Visually inspect exhaust for excessive smoke.
- If the engine smoke emission appears normal, no further troubleshooting is required. Shut down the engine.
- If the engine exhaust smoke is excessively black or gray, shut down the engine. Check the exhaust brake gate; refer to "9.11 Faulty Exhaust Brake Gate" .
|EPA07 MBE 4000 DDEC VI Troubleshooting Guide - 6SE568|
|Generated on 10-13-2008|