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1.
Remove the diesel exhaust fluid
container cap. Place the spout onto the
container and tighten until you feel a
strong resistance.
2. Remove the diesel exhaust fluid tank
filler cap.
3. Insert the spout into the filler neck until
the seal on the spout seats onto the
filler neck. Pour the fluid into the tank.
When the tank is full the fluid stops. In
case of direct fill tank, the spout does
not seal against the fill tank interface
and does not stop the flowing
automatically.
4. Return the container to the vertical
position slightly below the diesel
exhaust fluid filler neck. Allow any fluid
remaining in the spout to drain back
into the container.
5. Remove the spout from the diesel
exhaust fluid filler neck. Replace the
diesel exhaust fluid tank cap.
6. Remove the spout from the diesel
exhaust fluid container and replace the
cap.
Note: If there is diesel exhaust fluid left in
the container retain it for later use. The
spout is reusable. Wash the spout with
clean water prior to storage. Do not use the
diesel exhaust fluid spout with any other
fluid.
Filling the Diesel Exhaust Fluid Tank in
Cold Climates
Diesel exhaust fluid freezes if the ambient
temperature is below 12°F (-11°C). Your
vehicle has a preheating system which
allows diesel exhaust fluid to operate
below 12°F (-11°C). If you do not use your
vehicle for an extended period when the
ambient temperature is below 12°F (-11°C),
the fluid in the tank freezes. If the tank is
overfilled and the fluid freezes it may
damage the tank. This is not covered by
the vehicle warranty.
2025 F-650/750 (TBC) , enUSA, Edition date: 202310, First-Printing
Engine Emission Control
121
Note: If the diesel exhaust fluid tank is
frozen, it may not recognize when the tank
is refilled. The diesel exhaust fluid level
updates once the tank thaws out.
Diesel Exhaust Fluid Warning
Messages and Vehicle Operations
WARNING: Diesel exhaust fluid
must be refilled when low or replaced
when contaminated or your vehicle
speed becomes limited to 50 mph
(80 km/h). In these conditions, drive with
caution and refill diesel exhaust fluid
immediately. If the diesel exhaust fluid
becomes empty or contaminated and
fluid is not replaced, your vehicle
becomes limited to engine idle only once
stopped. In these conditions, be cautious
where you stop your vehicle because you
may not be able to drive long distances
or maintain highway speeds until you
refill or replace the diesel exhaust fluid.
Note: Drain and replace diluted diesel
exhaust fluid.
WARNING: Tampering with or
disabling the selective catalytic
reduction system results in severe
vehicle performance limitation including
eventual speed limiting to 5 mph
(8 km/h).
A systems check displays messages
indicating the amount of diesel exhaust
fluid available or displays a warning
message indicating the approximate
distance remaining as the fluid in the diesel
exhaust fluid tank nears empty. See
Information Messages (page 75).
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