Filter

Filters protect a commercial vehicle engine and systems by removing contaminants from the oil, fuel, air, and other fluids that flow through them. This category covers the replaceable filters that keep these fluids and air clean, including oil, fuel, air, and cabin filters.

Each filter traps dirt, soot, water, or other contaminants before they reach the parts they would damage. The oil filter cleans engine oil, the fuel filter removes dirt and water from diesel, the air filter keeps the intake air clean, and the cabin filter cleans air entering the cab. By holding back contaminants, filters keep the systems running efficiently and extend the life of expensive components.

Filters fill up with the contaminants they trap and must be replaced on schedule, because a clogged filter restricts flow. Signs of an overdue filter include reduced performance, poor fuel economy, and in some cases a bypass that lets unfiltered fluid through. Because a neglected filter lets contaminants reach the engine or reduces flow, filters are changed at the manufacturer recommended intervals.

The correct filter depends on the vehicle and engine model and the system it serves. Confirm the part against the vehicle specification before fitting, and follow the recommended change interval.