Engineered for the Life-of-the-System: The Power Steering Filter Cartridge. This listing is for one high-quality Power Steering Filter Cartridge Element, designed to keep your vehicle's hydraulic steering system clean and operating smoothly. As a replacement for the Dnldson P579124, this filter is a vital defense against contaminants that can cause sluggish performance and costly steering component failure in heavy-duty applications. The filter uses durable 25-micron cellulose media in a compact cartridge style, specifically engineered to fit in the original filter housing of various commercial trucks, including the Freightlner Colmbia. The incorporation of high and low-range bypass valves ensures that the hydraulic fluid continues to flow optimally, even when the filter element reaches its service limit, thereby guaranteeing responsive steering and long-term system health. Regular replacement ensures optimal system pressure and prevents costly repairs. Characteristics: ⦁ Part Type: Power Steering Filter Element ⦁ OEM Brand (Genuine Cross): Dnldson ⦁ Part Number (Interchange): P579124 ⦁ Cross References: Fleetgard HF35387, Freightlner 1417927000, Baldwn PT23629 ⦁ Filter Style: Cartridge ⦁ Media Type: Cellulose ⦁ Efficiency (Beta 75): 25 Micron ⦁ Bypass Valve Setting: 15 psi (LR) / 16 psi (HR)