Safety filters serve two functions: they act as a backup to the primary filter and protect the engine while the primary filter is being serviced. • Act as a backup filter if the primary filter is damaged or installed improperly. • Prevent contaminants from entering the clean side of the air intake system while the primary filter is being serviced. • Are designed to plug quickly if contamination gets past the primary filter, alerting operators to an issue. • It is recommended that safety filters be replaced with every third primary filter change, unless the primary filter has failed.
