Safety filters serve two functions: they act as a backup to the primary filter and protect the engine during primary filter servicing.
• They serve as a backup filter in case of primary filter damage or improper installation.
• They prevent contaminants from entering the clean side of the air intake system during primary filter servicing.
• They are designed to plug rapidly 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.
