Donaldson P778906 Safety RadialSeal™ Air Filter The Donaldson P778906 is a high-efficiency safety air filter designed to work alongside the primary air filter in heavy-duty equipment. It serves as a secondary line of defense, protecting the engine from harmful contaminants in the event of a primary filter failure or during filter servicing. Key Features: Backup Engine Protection: Acts as a final safeguard by preventing dirt and debris from entering the engine if the primary filter is damaged or removed. RadialSeal™ Technology: Provides a reliable, vibration-resistant seal for easy installation and secure fit. Rapid Plugging Media: Engineered to quickly restrict airflow if contaminated, signaling the need for maintenance. Robust Design: Built to perform in harsh environments, ensuring long service life and consistent performance. Specifications: Part Number: P778906 Filter Type: Safety RadialSeal™ Air Filter Outer Diameter: 134.6 mm Inner Diameter: 94 mm Length: 449 mm Efficiency Standard: Meets ISO 5011 standards Application Type: Secondary air filtration for heavy-duty diesel engines Applications Include: Construction and Agricultural Equipment Off-Highway Machinery Industrial Engines Equipment operating in dusty or severe environments Donaldson P778906 helps protect your engine’s clean air intake path, extending the life of your equipment and ensuring consistent performance in the most demanding conditions.