FASS Heavy Duty Series Information

It is very important that the fuel system of a diesel engine is free of contaminants like water, air, vapor, dirt, or other debris, that will strain your vehicle’s injection pumps and injectors. Why is pure fuel so important? When a system uses pure fuel, the closing injectors work smoothly. If fuel vapor is present, the injector closes with greater force, causing potential damage and excessive wear to your injector tips. The mixture of fuel, oxygen, and engine heat creates fuel ‘mist,’ significantly less stable than pure fuel. Blown injector tips usually lead to damaged pistons and cylinder walls.

Many users need more fuel than the OEM equipment can supply, and this is when fuel systems such as the FASS Heavy Duty become very useful. The Heavy Duty has the largest overall capacity of the FASS line, using the largest filters that have many cross-references. The Heavy Duty and Titanium Series share the same blueprint, and both pump at the same PSI. However, the Heavy Duty was designed to work better with Class 8 tractors and semi-trucks that require a greater maximum gallons per hour capability (260 GPH as opposed to the Titanium’s 220 GPH max). The device can also accommodate light-duty pickup truck owners who have an overt need for massive fuel flow, and do not care about tucking the pump closer to the frame. (The Heavy Duty is approximately 14" in height.) The FASS Heavy Duty fuel system can support any Class 1 to Class 8 vehicle, including agriculture, industrial, recreational, competition, highway and off-road engines under 600 HP.

Why is this FASS system so unique? These Missouri-based engineers designed the FASS Heavy Duty with exclusive Silencing Technology and Performance Radius Cuts. This means the quietest system in the world will flow pure fuel to your injectors as smoothly as possible.

FASS’s owner Brad Ekstam once said that “Air is the number one contaminant in the hydraulics system,” and this statement is true. In March 2005, researchers from the prestigious University of Chicago physics department discovered that the “removal of air eliminates the splash process that occurs when a liquid crashes onto a flat surface.” In summary, the FASS Heavy Duty will stem the flow of contaminants (especially air) into your engine and provide it with constant pressure, leaving you with better performance and longer-lasting machinery. 

FASS recommends changing the Heavy Duty series’ filters every 50,000 miles as well as draining the water separator every 250 gallons. The Heavy Duty, like the Titanium, has the facility for attaching either an electronic heater for extremely cold days, or attaching cooling lines through it. In addition, the pressures of the Heavy Duty are preset by FASS, but they are easily adjusted by changing the spring.

Please see the OC Diesel website for the FASS Heavy Duty series. If you have any questions about the FASS Heavy Duty or any other FASS product, feel free to call and speak to a FASS service professional at 714-848-2170.