This secondary air filter is designed to protect your engine during primary filter service, ensuring contaminants remain at bay when you replace your main filter. It functions as a crucial safety backup to help maintain uninterrupted engine performance. When you purchase the Donaldson P145859 air filter from us, you're investing in quality and dependability.

Key Benefits

• Acts as a reliable safety filter during primary filter replacement
• Prevents debris and contaminants from entering the engine
• Recommended to be replaced with every third primary filter change
• Perfect for TRAINEE models and similar equipment
• Enhances engine longevity while you invest in a trusted product

Technical Specifications

• Outer Diameter: 11.87 inches
• Inner Diameter: 10.25 inches
• Length: 17.66 inches; Overall Length: 18.16 inches
• Bolt Hole Diameter: 0.9 inches
• Efficiency: 99.9% (ISO 5011 certified)
• Brand-new, genuine parts made in the USA

Why Choose Donaldson?

Enjoy fast and dependable shipping—typically within one business day—with no minimum order requirements. Order your Donaldson P145859 air filter today and experience the quality of authentic, high-performance components. For more outstanding air filters, visit our Air Filters collection or explore the trusted Donaldson collection.