The IFH Group, Inc. is the largest manufacturer of hydraulic oil reservoirs and fuel tanks for off-road vehicles used in construction, agriculture and many other areas. The company occupies a 106,000-square foot manufacturing facility in Rock Falls, IL, housing a 10K Fiber Optics laser, 8 robotic welding cells, new Pirahna roll machine, seam welders, and much more! TANKS AND RESERVOIRS We are the largest manufacturer in the USA of custom steel fuel and hydraulic oil tanks for off-road and specialty vehicles. Applications include combines, heavy terrain forklifts, earth boring equipment, boom cranes, grounds keeping equipment, end loaders and hay bailers. Fuel Tanks and Hydraulic Reservoirs range in capacities from 1 to more than 300 gallons, and are manufactured from steel, stainless steel, aluminum or aluminized steel.