Donaldson Company Fuel Filter, Secondary Screw-On Part No: P553009

The Donaldson P553009 Fuel Filter, Secondary Screw‑On, is engineered to deliver high‑efficiency filtration as a second stage in the fuel system. After the primary fuel filter removes larger contaminants, this secondary filter captures smaller particles that could harm precision fuel pumps and injectors. Its durable screw‑on design ensures secure installation and reliable performance in harsh environments. Ideal for commercial trucks, tractors, and heavy equipment, this filter helps maintain clean fuel flow, promote smoother combustion, extend component life, and reduce costly downtime — supporting dependable engine performance and longer service intervals.