Series 50 – Section 21.2 Restricted Air Cleaner Element

Section 21.2
Restricted Air Cleaner Element

To determine if a restrictive air cleaner 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 "21.3 Restricted or Cracked Charge Air Cooler" .
   2. If damage or clogging is found; refer to "21.2.1 Air Filter Element Replacement" .

Section 21.2.1
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 air filter element replacement; refer to "21.2.1.1 Test the Engine with Replaced Air Filter Element" .

Section 21.2.1.1
Test the Engine with Replaced Air Filter Element

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

1. Start and run the engine.
2. Run the engine at idle with a no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range.
3. Visually inspect exhaust for excessive smoke.
   1. If the engine exhaust emission appears normal, no further troubleshooting is required. Shut the engine down.
   2. If the engine exhaust emission is excessively black or gray, shut the engine down. Check the charge air cooler; refer to "21.3 Restricted or Cracked Charge Air Cooler" .