Donaldson P-Series Lube Filters Increased engine emissions control and tighter tolerances within the engine require high efficiency filters. Donaldson P-Series filters are constructed with full synthetic or synthetic blend media for high efficiency. The media is embedded deeper into the sealing plastisol than conventional filters, allowing better sealing longevity. The lube filter can is constructed of heavy gauge steel, with many models having domed tops that provide superior pressure fatigue performance. The center tube allows more flow without compromising strength, and the louvered design eliminates tearing during pleat movement. The can and base plate are I assembled using a fully tucked seam, roll-formed threads, a nitrile sealing gasket and a compression spring holding all the components in place within the filter. Air Filters Donaldson P-Series filter media is made up of specially formulated fibers designed to trap contaminants such as dust, dirt and soot before they reach the engine. The media is pleated to maximize the filter surface area and placed between rigid liners to provide stability and. support. A high quality filter seal is applied or built-in to the open end of the filter to prevent dirty air from bypassing the filter. Donaldson has developed an extensive range of air filter media to provide the best engine protection no matter what the operating conditions. For example, using the same particle size contaminant, for every eight grams of dirt passed through a Luber-finer filter, the Donaldson filter passed only two grams.

Coolant Filters
Donaldson coolant filters are designed to maintain the proper chemical balance and reduce contaminants in the engine cooling system. AMSOIL offers a complete line of Donaldson filters with supplemental coolant additive (SCA) technology for the majority of heavy-duty diesel engines service requirements. SCA's are
chemicals in the filter that are released into the coolant as it passes through. SCA's help resist corrosion and cavitation in the engine (Note: Although there is no need for SCA's when using AMSOIL Antifreeze & Coolant, the use of Donaldson Heavy Duty Filters along with AMSOIL Antifreeze & Coolant will not affect performance.). The heavy-duty construction works in a wide variety of operating environments. Donaldson filters feature heavy-duty thread plates, seals designed for extreme cold and heat, durable filter media and a unique center tube that increases flow and adds structural strength.

Fuel Filters
Today's engines are built to more stringent specifications and finer tolerances. Fuel systems, pumps and injectors require cleaner fuel to achieve better combustion and lower emissions. AMSOIL carries Donaldson's full line of replacement fuel filters, featuring the latest advances in filter media that makes the difference between engine power and engine problems.

Hydraulic Filters
Donaldson also develops, manufactures, and markets a full line of hydraulic filters for the protection of machinery and components in hundreds of applications—in the factory and on heavy duty-mobile equipment. In fact, Donaldson is considered the world leader in hydraulic filtration.