Ford F-650/750 (2018 year). Manual - part 50

Transmission Fluid Level

Low Fluid Level

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If the fluid level is at or below the minimum
mark, add fluid immediately.  See
Capacities and Specifications (page
269).

Note: If there is no indication of fluid on the
dipstick, have your vehicle checked
immediately.

Correct Fluid Level

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Make sure that the fluid level is between
the maximum and minimum marks.

High Fluid Level

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Do not add fluid further than the maximum
mark. Fluid levels above the maximum
mark may cause shift or engagement
concerns and possible damage.

Note: High fluid levels can be caused by an
overheating condition.

Adding Transmission Fluid

Do not use supplemental transmission
fluid additives, treatments or cleaning
agents. The use of these materials may
affect transmission operation and result
in damage to internal transmission
components and could lead to
transmission damage that may not be
covered by the vehicle Warranty.

Use only recommended transmission fluid
that meets our specifications.  See
Capacities and Specifications (page
269).

Note: Use of a non-approved automatic
transmission fluid may cause internal
transmission component damage.

If necessary, add fluid in 8 fl oz (250 ml)
increments through the filler tube until the
level is correct.

If an overfill occurs, excess fluid should be
removed, have your vehicle checked as
soon as possible.

BRAKE FLUID CHECK

WARNINGS

Do not use any fluid other than the
recommended brake fluid as this will
reduce brake efficiency. Use of

incorrect fluid could result in the loss of
vehicle control, serious personal injury or
death.

Only use brake fluid from a sealed
container. Contamination with dirt,
water, petroleum products or other

materials may result in brake system
damage or failure. Failure to adhere to this
warning could result in the loss of vehicle
control, serious personal injury or death.

Do not allow the fluid to touch your
skin or eyes. If this happens, rinse the
affected areas immediately with

plenty of water and contact your physician.

A fluid level between the MAX and
MIN lines is within the normal
operating range and there is no need

to add fluid. A fluid level not in the normal
operating range could compromise the
performance of the system. Have your
vehicle checked immediately.

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To avoid fluid contamination, the reservoir
cap must remain in place and fully tight,
unless you are adding fluid.

Only use fluid that meets Ford
specifications.  See Capacities and
Specifications (page 255).

POWER STEERING FLUID
CHECK

Check the power steering fluid.  See
Scheduled Maintenance (page 320).  If
adding fluid is necessary, use only
MERCON LV ATF

Check the fluid level when it is at ambient
temperature.

1.

Check the fluid level in the reservoir. It
should be between the MIN and MAX
range. Do not add fluid if the level is
within this range.

2. If the fluid level is low, add fluid to bring

the fluid level up to between the MIN
and MAX range.

3. Switch the engine on.

4. While the engine idles, turn the steering

wheel left and right several times.

5. Switch the engine off.
6. Recheck the fluid level in the reservoir.

Do not add fluid if the level is between
the MIN and MAX range.

7.

If the fluid is low, add the proper type
of fluid in small amounts, continuously
checking the level until it is between
the MIN and MAX range.  See
Capacities and Specifications (page
269).  Be sure to put the cap back on the
reservoir.

WASHER FLUID CHECK

WARNING

If you operate your vehicle in
temperatures below 40°F (5°C), use
washer fluid with antifreeze

protection. Failure to use washer fluid with
antifreeze protection in cold weather could
result in impaired windshield vision and
increase the risk of injury or accident.

Add fluid to fill the reservoir if the level is
low. Only use a washer fluid that meets
Ford specifications.  See Capacities and
Specifications (page 255).

State or local regulations on volatile
organic compounds may restrict the use
of methanol, a common windshield washer
antifreeze additive. Washer fluids
containing non-methanol antifreeze
agents should be used only if they provide
cold weather protection without damaging
the vehicle’s paint finish, wiper blades or
washer system.

DRAINING THE FUEL FILTER
WATER TRAP - 6.7L DIESEL

Your vehicle is equipped with a diesel fuel
conditioner module located on the
frame-rail under the driver-side floorboard
near the transmission.

You should drain water from the
module assembly whenever the
warning light comes on and the

message center directs you to drain the
water separator. This will occur when
approximately 8.45 fl oz (250 ml) of water
accumulates in the module. If you allow
the water level to exceed this level, the
water may pass through to the engine and
may cause fuel injection equipment
damage.

Draining the Diesel Fuel
Conditioner Module (DFCM)

WARNING

Do not drain the water-in-fuel
separator while the engine is running.
Failure to follow this warning may

result in fire, serious injury, death or
property damage.

Note: If you drain the diesel fuel conditioner
module while the system is running air will
enter into the fuel system. The engine will
not operate properly if air enters the system.

Note: With fuel tank levels above 3⁄4 tank
it may be necessary to loosen the bowl three
turns before opening the drain. This will
actuate an anti-siphon valve at the fuel and
water separator inlet and prevent the fuel
from siphoning out of the tank.

Note: A loose drain valve can allow air to
enter the fuel system and cause drivetrain
issues. The engine will not operate properly.
Be sure that you fully tighten the drain valve.

1.

Stop your vehicle and shut off the
engine.

2. Locate the diesel fuel conditioner

module and place an appropriate
container under the drain port.

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3. Rotate the drain counterclockwise until

the O-ring is visible. Allow the diesel
fuel conditioner module to drain for
approximately 25 seconds or until
clean fuel is observed. Rotate the drain
clockwise to tighten it. If no liquid
drains, there may be a clog in the drain.
Have the conditioner module serviced
by an authorized dealer.

4. Make sure that you fully tighten the

drain valve and then remove the
container from under your vehicle.

5. Restart the engine. If the Water in Fuel

Drain Filter message and light
continues to illuminate, have the fuel
system checked and repaired.

FUEL FILTER - 6.8L

Your vehicle is equipped with a lifetime
fuel filter that is integrated with the fuel
tank. Regular maintenance or replacement
is not needed.

CHANGING THE 12V BATTERY

WARNINGS

This vehicle may be equipped with
more than one battery, removal of
cable from only one battery does not

disconnect the vehicle electrical system.
Be sure to disconnect cables from all
batteries when disconnecting power.
Failure to do so may cause serious
personal injury or property damage.

Batteries normally produce explosive
gases which can cause personal
injury. Therefore, do not allow

flames, sparks or lighted substances to
come near the battery. When working near
the battery, always shield your face and
protect your eyes. Always provide proper
ventilation.

When lifting a plastic-cased battery,
excessive pressure on the end walls
could cause acid to flow through the

vent caps, resulting in personal injury and
damage to the vehicle or battery. Lift the
battery with a battery carrier or with your
hands on opposite corners.

Keep batteries out of reach of
children. Batteries contain sulfuric
acid. Avoid contact with skin, eyes or

clothing. Shield your eyes when working
near the battery to protect against possible
splashing of acid solution. In case of acid
contact with skin or eyes, flush
immediately with water for a minimum of
15 minutes and get prompt medical
attention. If acid is swallowed, call a
physician immediately.

Note: If your battery has a cover/shield,
make sure it is reinstalled after the battery
has been cleaned or replaced.

Note: Battery posts, terminals and related
accessories contain lead and lead
compounds. Wash hands after handling.