Mobile Auxiliary Filtration Systems

Keep your engine, hydraulic, transmission, and fuel system components operating at peak performance.

From Micron to Machine – We Keep it Clean

Microscopic Protection. Massive Results.

Custom-engineered kidney-loop filtration systems that extend oil life, boost performance, and keep your equipment running at its best. Our mobile auxiliary filtration units operate in a continuous kidney-loop configuration, ensuring maximum fluid cleanliness without interrupting production. Each system is custom designed for its specific application, ensuring seamless integration with your existing equipment and operational needs. Equipped with water-absorbing depth filter elements containing thousands of layers of tightly packed cellulose, these systems not only capture microscopic particles and free water before they can damage your equipment, but also feature an exceptionally high particulate-holding capacity—up to 8 lbs depending on the system—allowing for extended filter life and reduced changeouts.

A 1-micron particle is about 70 times smaller than the diameter of a human hair—yet these tiny contaminants cause the majority of wear in lubrication systems. By steadily processing small volumes of oil every second, our units deliver verified performance—removing 99.5% of particles—significantly increasing equipment performance, extending component life, and enabling longer oil drain intervals without compromising fluid quality. Best of all, these systems are designed to work in harmony with your existing equipment and will not void manufacturer warranties.

There is no other company in the industry offering the same level of seamless, fully customized filtration integrations that Guardian Reliability Services provides—ensuring your system operates cleaner, longer, and more efficiently than ever before.

The Guardian Systems

Industrial transmissions, powershift gearboxes, and hydrostatic drives operate under extreme conditions—handling high torque, heavy loads, and constant gear changes. These operating environments generate heat, shear stress, and a steady stream of wear debris from clutch packs, gears, and bearings. Industry studies show that up to 75% of transmission failures are directly related to fluid contamination, with the majority caused by particulate from internal wear sources.

In modern transmission systems, precision spool valves and hydraulic control circuits regulate gear shifting, torque modulation, and clutch engagement. These components operate at extremely tight tolerances—meaning even small amounts of fine particulate or degraded oil can cause sticky valves, shift delays, erratic gear engagement, and premature clutch failure. Under high-load situations, clutch friction material wear accelerates, adding more debris and heat to the system, compounding the contamination problem.

Standard onboard filtration is designed to protect from large debris but cannot keep pace with the ultra-fine particulate and oxidation byproducts generated during severe duty cycles. Left unchecked, this contamination leads to plugged control passages, excessive heat, varnish formation, and costly downtime.

The Guardian Auxiliary Transmission Filtration System is purpose-built to resolve these challenges. Operating in a dedicated kidney-loop configuration, it continuously conditions transmission oil—capturing ultra-fine wear metals, clutch material, and oxidation byproducts while absorbing moisture and reducing varnish precursors. Our high-capacity depth media elements can hold 2–8 lbs of particulate, significantly lowering ISO cleanliness codes and ensuring clean, stable oil for longer periods.

By maintaining optimal oil cleanliness, The Guardian Systems extend clutch and spool valve life, reduce heat-related failures, prevent varnish deposits, and enable extended drain intervals without sacrificing OEM warranty compliance. Cleaner oil means smoother shifts, more consistent performance under heavy loads, and dramatically reduced risk of costly unplanned repairs.

Available in multiple housing sizes and flow capacities, our Auxiliary Transmission Filtration units can be retrofitted or factory-integrated into any mobile equipment, industrial drivetrain, or hydrostatic drive application—delivering measurable improvements in reliability, uptime, and total cost of ownership.

The result: fewer failures, longer oil and component life, improved shift quality, and dependable transmission performance in the harshest operating conditions.

Today’s diesel engines feature precision-built fuel injection systems, ultra-fine injector tolerances, and high-pressure common rail technology—often exceeding 30,000 psi. While these advancements deliver exceptional efficiency and emissions performance, they also make engines far more susceptible to the damaging effects of poor fuel quality. Even trace levels of particulate, water, or microbial contamination can cause injector scoring, nozzle wear, reduced fuel economy, and costly unplanned downtime.

Compounding the issue, ultra-low sulfur diesel (ULSD) and biodiesel blends have lower natural lubricity and a greater tendency to absorb water—creating an ideal environment for microbial growth. Contaminants that bypass standard OEM filtration frequently lead to premature fuel filter plugging, aftertreatment fouling, injector failure, and diminished performance—each of which can result in thousands of dollars in repair costs and lost productivity.

The Guardian Diesel Auxiliary Filtration System eliminates these risks by operating in a continuous kidney-loop configuration that conditions fuel to exceed the cleanliness levels recommended by leading fuel system manufacturers. Our multi-stage filtration combines high-capacity water separation with ultra-fine particulate removal down to sub-micron levels, ensuring that only clean, dry fuel enters your injectors—extending their service life and preserving peak engine performance.

With The Guardian Systems in place, injector damage, fuel economy loss, plugged aftertreatment, and premature OEM filter plugging become a thing of the past. Available in multiple flow rates and configurations, our systems integrate seamlessly with stationary storage tanks, mobile fuel trailers, or directly into fueling operations, delivering consistent protection wherever your equipment operates.

The result: maximum injector life, lower maintenance costs, improved fuel efficiency, cleaner combustion, and reliable performance—all while ensuring your fuel meets or exceeds industry cleanliness standards before it ever enters your engine.

Hydraulic systems are the heartbeat of countless industrial and mobile applications—but they are also highly sensitive to contamination. Industry data shows that over 80% of hydraulic failures are caused by fluid contamination, leading to high ISO cleanliness codes, sticking or sluggish valves, erratic actuator movement, pump wear, and accelerated seal degradation. Over time, thermal stress and oxidation create varnish deposits that restrict flow paths, reduce heat transfer efficiency, and cause preventive maintenance (PM) fade, where scheduled service fails to maintain expected system performance.

Modern hydraulic equipment operates at higher pressures, tighter tolerances, and hotter temperatures than ever before. While onboard filtration protects against large debris, it is not designed to handle ultra-fine particulates, oxidation byproducts, or moisture contamination at the levels required to meet OEM cleanliness targets. This gap allows small but damaging contaminants to circulate—shortening component life, increasing downtime, and raising operating costs.

The Guardian Auxiliary Hydraulic Filtration System solves these challenges by operating in a dedicated kidney-loop configuration, continuously conditioning the fluid whether the equipment is running or idle. Using high-capacity depth media with a holding capacity of 2–8 lbs of particulate (depending on system size), our system captures ultra-fine particles, absorbs moisture, and removes varnish precursors—dramatically lowering ISO codes and preventing contamination-related failures.

By maintaining cleaner hydraulic fluid, The Guardian Systems not only extend component life and prevent costly breakdowns, but also enable significantly extended drain intervals without sacrificing system performance or OEM warranty compliance. This reduction in fluid change-outs translates directly into lower operating costs, less waste oil generation, and improved environmental stewardship.

With The Guardian Systems in place, sticky valves, pump scoring, varnish build-up, thermal degradation, and premature component replacement become a thing of the past. Available in multiple housing sizes and flow capacities, our Auxiliary Hydraulic Filtration units are designed for retrofit or new system integration on any industrial or mobile hydraulic platform.

The result is consistent fluid cleanliness, extended oil and component life, reduced downtime, lower maintenance costs, and peak hydraulic performance—day after day, shift after shift.

Modern diesel and gas engines are engineered to meet increasingly strict emissions standards while delivering maximum performance. However, advanced aftertreatment and EGR (Exhaust Gas Recirculation) systems introduce additional soot, acids, and fuel dilution into the crankcase, creating a heavier contamination load for the oil to manage. Higher combustion temperatures, reduced oil sump capacities, and tighter internal tolerances place engine components under greater stress and leave far less margin for contamination before damage occurs.

The Guardian Mobile Auxiliary Filtration System is purpose-built to address these challenges by continuously conditioning engine oil in a dedicated kidney-loop circuit—independent from the engine’s primary lube system. Using high-capacity depth media elements with thousands of densely packed cellulose layers, our systems remove ultra-fine particulate and absorb free and emulsified water—capturing the wear-causing contaminants that standard full-flow filters cannot. Each element can hold 2–8 lbs of particulate, extending filter life and maximizing operational efficiency.

To ensure optimal performance across any application, The Guardian Systems are available in three filtration housing sizes, allowing you to match the unit precisely to your engine’s sump capacity and contamination load. Whether protecting a small auxiliary engine, a mid-size industrial power unit, or a large mobile fleet asset, we have a solution sized for your needs.

By maintaining cleaner oil despite the contamination challenges of modern emissions systems, The Guardian Systems help preserve oil integrity, prevent varnish and sludge formation, and protect critical engine components.

The result is extended drain intervals, reduced unplanned downtime, and longer engine life—all while keeping OEM warranty compliance intact. Designed for versatility, our mobile systems integrate seamlessly with any platform, from stationary power units to heavy equipment fleets, delivering measurable savings and dependable performance in even the harshest operating environments.

Ready to partner with us?

From system design to application-specific solutions, our experts are ready to support your operations with reliable, engineered services tailored to your facility.

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