MBE 4000 DDEC VI Troubleshooting – Section 9.1 Restricted Air Cleaner Element

Section 9.1
Restricted Air Cleaner Element

To determine if a restrictive air cleaner element is causing excessive black or gray smoke, perform the following:‪

1. Remove the air filter element from the air cleaner container; refer to OEM guidelines.
2. Visually inspect the air cleaner element for damage or clogging.
   1. If no damage or clogging is found, check the charge air cooler; refer to "9.2 Restricted or Cracked Charge Air Cooler" .
   2. If damage or clogging is found, refer to "9.1.1 Air Filter Element Replacement" .

Section 9.1.1
Air Filter Element Replacement

Perform the following to replace the air filter element:‪

1. Remove and replace the damaged or clogged air filter element; refer to OEM guidelines.
2. Verify that replacing the air filter element eliminated the excessive exhaust smoke; refer to "9.1.1.1 Test the Engine with Replaced Air Filter Element" .

Section 9.1.1.1
Test the Engine with Replaced Air Filter Element

Perform the following to determine if the new filter element resolved excessive exhaust smoke:‪

PERSONAL INJURY ‪
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.‪

1. Start and run the engine.
2. Run the engine at idle with a no-load condition for approximately five minutes, allowing the engine coolant to reach normal operating range, approximately 88-96°C (190-205°F).
3. Visually inspect exhaust for excessive smoke.
   1. If the engine exhaust emission appears normal, no further troubleshooting is required. Shut down the engine.
   2. If the engine exhaust emission is excessively black or gray, shut down the engine. Check the charge air cooler; refer to "9.2 Restricted or Cracked Charge Air Cooler" .