Air System

The air cleaner restriction indicator (filter minder) should be inspected per the maintenance intervals, Preventive Maintenance Tables, or more often if the engine is operated under severe dusty conditions. Replace the air filter if the filter minder has reached maximum allowable restriction. Do not allow the air inlet restriction to exceed maximum allowable restriction.

A clogged air cleaner element will cause excessive air intake restriction and reduced air supply to the engine resulting in increased fuel consumption, inefficient engine operation, aftertreatment failure, and reduced engine life. High intake restriction will also cause oil pullover from the turbocharger into the charge air system.

The air system should also be periodically inspected for leaks. Leaks in the air system can cause dirt ingestion into the engine, performance problems, or aftertreatment failure.