The Donaldson P550520 is a high-quality spin-on full-flow lube filter designed for heavy-duty applications, serving as a direct equivalent to the Caterpillar P550520 oil filter. This filter features a 1-16 UN thread size, 93 mm outer diameter, and 175 mm length, ensuring efficient lubrication system protection. It incorporates an anti-drainback valve and a bypass valve set at 1.7 bar (25 psi) to maintain oil flow during cold starts or high differential pressure conditions. Constructed with cellulose media, the P550520 offers 99% efficiency at 25 microns, effectively protecting critical engine components across a wide range of Caterpillar machinery and engines.

Donaldson Company, Inc. was founded in 1915 by Frank Donaldson in Minneapolis, Minnesota, USA. Initially, the company developed an air cleaner for farm tractors, addressing a critical need for engine protection in dusty agricultural environments. Today, Donaldson remains headquartered in Minneapolis and has grown into a global leader in filtration systems, serving a wide array of industries beyond agriculture. Donaldson is renowned for its comprehensive range of filtration products, including air, liquid, and hydraulic filters. Its advanced filtration technologies are designed to protect engines, equipment, and processes from contaminants, enhancing performance and extending machinery lifespan. The brand's product lines include PowerCore® air filters, TopSpin™ pre-cleaners, and various fuel and lubricant filters, all engineered for demanding operational conditions in heavy-duty machinery. At Partao, you can find a broad selection of genuine Donaldson spare parts across top categories such as Bolts & Fasteners, Hydraulic Filters, Oil Filters, Air Filters, and Beacon Lights. These components are essential for maintaining the efficiency and longevity of agricultural and off-highway equipment. Over 77,088 genuine Donaldson spare parts are available at Partao. Equipment operators globally rely on Donaldson for robust and effective filtration solutions. The brand's extensive network ensures that high-quality replacement parts are accessible, supporting the continuous operation of machinery in diverse applications, from agricultural fields to construction sites. Choosing Donaldson parts helps maintain optimal engine health and operational reliability.