UFC 3-460-03
21 JANUARY 2003
3.3.4.1.2. After the fuel has been drained from the manifold, remove the fifteen elements on the
outlet side of the manifold.
3.3.4.1.3. To remove the cartridge hold-down plate, use a screwdriver for leverage to pry the
seals outward from the elements. The O-ring seals on the element mounts may be removed
more easily by applying a slight twisting motion instead of a direct pull.
3.3.4.1.4. Loosen and remove the victaulic coupling from the inlet pipe, sliding the sealing
gasket down on the manifold pipe section. Be sure to use a static bonding wire.
3.3.4.1.5. Remove the manifold. This requires two people to slide the manifold forward, using
the protruding element hold-down rods as handles to help in removing the manifold.
CAUTION: Have a container available to place the manifold in and catch any fuel that might
spill out of the manifold. Dispose of the used cartridges (filter elements) in an approved
manner. Do not allow fuel-soaked cartridges to be left in the area or disposed of in a manner
that can create a safety or fire hazard. Be careful when handling used cartridges because they
are toxic and combustible or flammable, depending on the fuel's flashpoint.
3.3.4.1.6. Remove the second-stage element and follow the steps outlined in paragraph 3.3.5.
below when cleaning.
3.3.4.1.7. Clean the inside of the F/S with rags.
3.3.4.1.8. Replace elements on the manifold and reinstall the manifold.
3.3.4.1.9. Align and bolt in the victaulic coupling.
3.3.4.1.10. Replace cover and tighten bolts using the criss-cross method. Tighten nuts just
enough to prevent leaking through the dome cover seal (refer to manufacturer's instructions for
torque requirements) to eliminate possible damage to the vessel.
3.3.4.2. For modified KMU-416/F (1135 liters per minute [300 gallons per minute]) kits with nine
additional elements on the back side of the manifold, remove only the bottom front six elements
instead of all fifteen elements. This will balance the manifold, and it may more easily be removed.
Remove the manifold from the vessel.
3.3.4.3. For KMU-417/F kits (2271 liters per minute [600 gallons per minute]), leave all elements
in place when removing the manifold. This provides balance and lets you remove the manifold
easily.
3.3.5. F/S Teflon-Coated Screens - Cleaning, Repairing, and Handling:
3.3.5.1. Cleaning. The Teflon-coated screens, when new, operate in a satisfactory manner, but after
processing millions of gallons of fuel that contain additives and contaminants they gradually become
less effective. Every time the coalescer elements are changed the second-stage Teflon-coated
screens should be inspected and cleaned according to the following procedure:
3.3.5.1.1. Connect a water hose to a hot water supply. Attach a nozzle to the hose and direct a
high-velocity stream of water at a downward angle against the outer surface of the Teflon-coated
screen. Hold the screen assembly vertically by the end to avoid touching the screen surface.
Begin at the top and work downward along the length of the screen. Rotate the screen slowly so
the entire surface is subject to the jet of hot water. Repeat as necessary until the screen is clean.
3.3.5.1.2. After cleaning, shake excess water from the screen and allow the remaining water to
evaporate, or use clean, dry, oil-free compressed air. Air quality must be very clean. If the air
quality is doubtful, do not use.
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