Lube Filter P550788

The Lube Filter P550788 delivers robust engine core security by continuously extracting abrasive carbon soot, fine metal friction wear debris, and airborne silica contaminants from the lubrication circuit before they can break down vital oil films. Precision-engineered as a direct factory replacement for Donaldson P550788 and matching the rigid original equipment requirements of Caterpillar 3890435, this large-diameter spin-on filter is optimized for high-horsepower power plants like the Caterpillar C13, C18 ACERT, and C18TA ACERT. It is built to support punishing, high-load machinery lines including Caterpillar 385C tracked excavators, 772 off-highway dump trucks, D9T crawler tractors, 988H wheel loaders, as well as Peterbilt 365 heavy commercial vocational trucks. Utilizing an advanced, high-efficiency cellulose media structure that is laboratory certified under rigorous ISO 16889 multi-pass test standards, this filter achieves an outstanding 99% efficiency rating at 21 microns. With a burst resistance rated up to 149 psi (10.3 bar), it provides uncompromised lubrication integrity under extreme fluid pressure surges, protecting critical internal crankshaft journals, turbocharger bearings, and overhead valvetrains from premature wear or unexpected field downtime.

This heavy-duty fluid protection component is manufactured to strict technical dimensions and original equipment parameters, serving as a direct engineering alternative for the following reference part numbers:

The industrial-grade Lube Filter P550788 is cross-certified for high-output diesel platforms, ultra-tonnage earthmoving machinery, bulk materials handling infrastructure, and heavy vocational highway transport fleets.