Replacing the Air Cleaner Element
Notice: All air intake components and connections must be air- and water-tight. Dirt or dust entering the engine can cause internal engine damage. Most of the dirt and dust particles are silicates, which fuse into abrasive glass-like particles when exposed to engine combustion. These particles can grind piston rings, pistons, and cylinder liners. Do not operate the engine with the air filter element or any air intake component removed.
Important: Due to the variety of possible driving conditions (dirt roads, paved roads, etc.), it is critical to check the air restriction indicator, if so equipped. If the vehicle is not equipped with an air restriction indicator, inspect all components of the air intake system and air filter every six months. Replace the air filter every 12 months, or when filter restriction reaches 25 inH 2O for Cummins diesel engines, or when the air restriction indicator is completely red for gasoline and Detroit™ diesel engines (if equipped with an air restriction indicator). More frequent inspections and/or filter replacement may be needed if the vehicle is being operated in a dusty environment, to avoid damaging the vehicle.
Notice: Do not use aftermarket air-cleaner elements. Aftermarket air-cleaner elements may not seal the housing correctly, which can lead to engine damage and potentially the loss of warranty. When replacing an air-cleaner element, use only the part listed in PartsPro for the serial number of the vehicle.
Notice: Do not clean or reuse the air filter. Cleaning and reusing the the air filter increases the chances of dirt entering the engine. Always replace with a new air filter.
Replace the air filter every 12 months, or when filter restriction reaches 25 inH 2O for Cummins diesel engines, or when the air restriction indicator is completely red for gasoline and Detroit diesel engines (if equipped with an air restriction indicator). See Safety Precautions of the Walk-In Van Workshop Manual for removal and installation instructions, or take the vehicle to an authorized Freightliner dealer.