When uptime is the metric that matters most, bringing fuel and service consumables to the machine—not the other way around—can transform productivity, reduce idle time, and cut unplanned travel.
FuelPro Trailers, a manufacturer based in Upper Sandusky, Ohio, has focused on that reality since 2011. The company’s newest configuration, the FuelPro 750 DEF, is purpose-built for heavy equipment fleets that operate far from a shop or fuel island and need a dependable, DOT‑compliant solution for refueling and routine field service.
As FuelPro puts it, “These stout, DOT (US Department of Transportation)-compliant fuel trailers provide the ability to refuel and service equipment on-site quickly and efficiently.”
The FuelPro 750 DEF integrates 750 gallons of diesel capacity with 125 gallons of diesel exhaust fluid (DEF), giving contractors, mine operators, and forestry crews a single, mobile platform to meet today’s emissions-compliant refueling needs without shuttling machines back and forth.
At the heart of the trailer is a 6-inch C-channel chassis designed for long service life and predictable handling on uneven ground. The fuel tank is fabricated from 7-gauge steel and double seam-welded to maximize structural integrity and leak resistance under vibration and thermal cycling. Inside the tank, surge baffles and cross bracing mitigate fuel slosh, protecting the trailer and tow vehicle from dynamic loads while maintaining better stability on slopes and during braking.
Fueling features are laid out for safety and convenience: a fuel shutoff valve for positive isolation, a lockable vented fill cap to prevent contamination and tampering, a tank pressure relief vent for safe operation across temperatures, and an at‑a‑glance fuel gauge to quickly confirm remaining capacity before deployment. Together, these elements help crews fuel fast while minimizing risk and downtime.
On the DEF side, FuelPro builds the system around 304‑grade stainless steel to resist corrosion and preserve DEF purity. The DEF circuit includes a 50‑micron stainless filter and a stainless DEF gauge, and the entire system is purged and sealed per ISO 22241 standards—the recognized benchmark for DEF quality management. Maintaining DEF integrity is critical: compromised DEF can trigger SCR faults and derates on Tier 4 Final equipment, stranding assets and killing productivity. The 750 DEF is designed to keep that from happening.
Refueling speed is a simple function of pump performance and hose management, and FuelPro addresses both.
A self‑priming industrial‑grade pump rated up to 25 gpm comes standard, powered by a deep cycle 12‑volt marine battery for reliable duty cycles away from shore power. The fuel delivery system features a 1‑inch hose with an auto‑trip nozzle, available in 18‑, 30‑, or 50‑foot lengths, and an auto‑retracting reel option to streamline hose control and reduce trip hazards on busy pads. For operators, the combination means faster cycles on loaders, dozers, excavators, skid steers, mowers, tractors, and support trucks—without dragging hoses across sharp aggregate or reeling by hand when time is tight.
Underneath, the trailer rides on two torsion axles with EZ lube hubs, each rated at 5,000 pounds. Torsion suspension improves ride quality and component life by isolating road shock, while electric drum brakes and digital breakaway on both axles add stopping assurance if a worst‑case event occurs. Rolling stock includes new ST235/80R16 radial tires and either 6- or 8‑bolt steel or aluminum wheels, chosen for durability and serviceability.
Electrical and visibility features include a 7‑way RV plug connector and LED side and rear lighting to keep the trailer conspicuous at dawn, dusk, and night. Safety hardware is equally comprehensive: heavy‑duty safety chains and hooks, diamond plate rock guard fenders for impact resistance, reflective DOT tape, and roll-over railing to safeguard both the tank and personnel in the refueling zone.
At the hitch, fleets can select an adjustable 5‑position vertical 2‑5/16‑inch ball hitch or a pintle hitch for compatibility across tow vehicles. A 7,000‑pound commercial jack provides stable, confident support during hookup, unhook, and service.
To combat the elements, FuelPro applies a PPG Delfleet Essential polyurethane epoxy primer coating system engineered for corrosion resistance and long-term finish stability—important in coastal, high‑humidity, and high‑chloride environments where unprotected steel deteriorates quickly.
The FuelPro 750 DEF carries an industry‑leading 5‑year tank warranty, signaling confidence in fabrication quality and material selection. Beyond paperwork, trailers are pressure tested and inspected at multiple stages in production, assuring that the tank and plumbing will perform as intended after the trailer leaves the factory.
While the 750 DEF is a popular configuration, FuelPro builds multiple sizes for larger and smaller fuel volumes and offers additional compartments for tools, grease, DEF, and other service components.
Options allow each trailer to be customized to the fleet’s workflow—whether that means longer hoses and reels for quarry benches, added storage for filters and fittings, or integrated lighting and signage for night refueling on highway jobs.
For contractors and fleet managers, the business case for a fuel-and-DEF trailer typically centers on reduced nonproductive travel, lower idle time, and higher effective machine utilization. When refueling happens on the cut, at the face, or in the stand rather than back at the yard, machines spend more minutes working and fewer minutes traveling. Crews avoid staging delays and refuel during natural breaks—lunch, shift changes, or brief maintenance windows—keeping production targets on track.
The integrated DEF capacity also streamlines compliance for Tier 4 Final equipment, ensuring refueling events include correctly handled DEF to avoid contamination and crystallization issues. Clean DEF and steady fueling routines minimize code faults and derates, protecting both uptime and emissions system health.
Finally, a dedicated trailer consolidates fuel handling, safety equipment, and storage into a single, mobile platform. That reduces the number of separate containers and ad hoc solutions on the jobsite, tightening safety practices and improving inventory control.
FuelPro Trailers is a division of NJF Manufacturing LLC and has been building fuel trailers since 2011. In addition to FuelPro Trailers, NJF Manufacturing produces Frey’s Show Pen Gates and Freeze Guard Waterers, reflecting a broader commitment to durable, field‑ready equipment.
For specifications, options, or ordering information, visit www.FuelProTrailers.com.