How to Drain the Fuel Coalescer
How
to Drain the Fuel Coalescer - Gen 5 DD15 - Ops - #7628
Incorporated into the fuel filter module is a coalescer. The coalescer removes water and/or sediment and is located in the lower portion of the fuel filter module (see graphic below). Water in fuel can seriously affect engine performance and may cause engine damage. A water-in-fuel (WIF) dash indicator will warn the driver when trapped water needs to be drained.
- Place a catch pan under the fuel coalescer to collect any water/fuel or sediment drained from the fuel coalescer.
- Open the water drain valve (3) located under the fuel filter module (see above graphic). Collect and dispose of water/fuel or sediment drained from the fuel coalescer in an environmentally responsible manner, according to state and/or federal recommendations.
- Allow the water/fuel or sediment to drain.
- Close the water drain valve (3) (see above graphic). Do not over-tighten the water drain valve. Failure to properly tighten the water drain valve may cause damage to the water drain valve and housing.
- Prime the fuel system with the built-in hand primer (about 50 strokes). The hand primer should not be used to prime any other type of fuel system service, as it will not provide sufficient priming, which may cause damage to the high pressure fuel pump.
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