Page 53 - ingenioren

Fuel Filter Water Separators

Water Draining & Sensors

Water & Draining Fuel Filters Water-in-Fuel Sensors (WIFs) FUEL FILTRATION

Most primary fuel filters have drains that allow the
operator to drain the water that has been separated by Water-In-Fuel sensors are typically
the filter. The frequency that the primary fuel filter needs chosen and installed by the engine
to be drained is ultimately dependent on the quality of manufacturer.
fuel that is being used. Most OEMs recommend draining
your water separator daily. It is also recommended to The WIF sensors connect to the fuel
pay attention to how much water is removed at each filter and routed to a display on the
drain and adjust your frequency accordingly. dashboard. A WIF sends an electrical
signal to the in-cab display when it alerts
Why Remove Water in Fuel? the operator when water is in the fuel and
Water in fuel can prematurely wear and oxidize the steel should be drained from the filter. WIF
components within the fuel injectors and lead to: sensors are more common in the newer
• Rusting and corrosion of components common rail injection systems.
• Governor/metering component failure
• Sticky metering components (both pump and nozzle) During filter service, WIF sensors are
disconnected and reused on the new
• Injection component wear and seizure filter. Sensors are likely to be replaced if
connectors are damaged or wires frayed.
Free or emulsified water must be removed from the fuel
to prevent corrosion and damage to the fuel system. Fuel The most common WIF sensors are either
additives may claim they remove water, what they do is Packard or Deutsch styles. Donaldson does not
dissolve the water, which will pass through the filter and offer sensors as a replacement part, but we do
enter fuel injectors. have filters with Twist&Drain valves that assemble
into these existing popular sensors.
Types of water contamination in diesel fuel:
1) Emulsified water (water is suspended in the fuel)
2) Free water, (water separates from the fuel and
generally collects at the bottom of the fuel or fuel Twist&Drain™ Icons
storage tank) Installation & Water Drain
3) Dissolved water (water is chemically dissolved in the
fuel Installation

Donaldson spin-on style fuel filter water separators have Filter will indicate if you should fill with
water drain instructions on the can. fuel before installation.

Maintenance Recommendations & Guidelines Apply a think film of clean motor oil to
the new gasket. Do Not use Grease.
• Drain water from your primary filter daily when refueling
• Carry a spare set of fuel filters in case you receive a Line up the filter threads to the threaded
“bad” load of fuel port carefully. Screw on and tighten until
• Never switch to more open filter to get longer filter life, gasket makes contact with base.
you are trading away fuel pump and injector life
• Never use fuel to lube up the gasket. Fuel isn’t as slick Number For final tightening of the filter, turn
as oil and if you use fuel it could cause your gaskets not + of turns the can to the number of turns (+)
to slide but to bunch or pinch when it is tighten causing indicated on the can.
the filter to leak.
Reconnect the WIF sensor.
• If using biodiesel:
• make sure your fuel supplier meets current fuel standards
• make sure your engine is compatible with the
concentration (or percent) biodiesel you wish to use
• When using your own fuel storage tank, remember that Water Drain 1 2 3
removing contaminants before they reach the vehicle is Three easy
the first part of the best practices process. So, ensure steps with
you have effective bulk storage tank filtration. standard drain
valve. Turn to open Let water Retighten
drain valve drain drain valve

www.donaldson.com Engine Liquid Filtration • 51