Ford Low Cab Forward (Ford year). Manual — part 33

2. Locate the module drain plug cap
on the outside of the left frame rail
and place an appropriate container
under the drain plug.

3. Loosen the drain plug by turning it counterclockwise. Allow to drain
for approximately 25 seconds or until clean fuel is observed. Install the
drain plug by turning it clockwise until it is firmly seated.

4. Verify that the drain plug is closed and sealed, then remove the
container from under the vehicle.

5. Restart the engine and check the WATER IN FUEL indicator light; it
should not be illuminated. If it continues to illuminate, have the fuel
system checked and repaired.

Fuel filter replacement

Both filters should be replaced at the same time. Replace the fuel filters
with Motorcraft Part No. FD-4596.

Removal
• Engine-mounted filter (15/16”

socket or

1

⁄

2

” square drive

required)

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134

• Frame-mounted filter (36 mm

socket required)

1. Place an appropriate container under the filter assembly, then remove
the fuel filter cap by turning counterclockwise.

2. Remove and discard the old fuel filter element.

3. Carefully clean the mating surfaces.

Installation

The engine will not run properly if the fuel filter is not installed
in housing.

1. Install new fuel filter into the fuel filter housing.

2. Tighten cap onto fuel filter housing slowly, allowing fuel to soak into
the fuel filter element. Tighten cap until it contacts the housing.

After replacing the fuel filter, the engine will purge the trapped
air as it runs. The engine may run roughly and smoke until the air
is completely eliminated.

Using a fuel which has more than average impurities may require
the fuel filter to be replaced more frequently than the service
interval specifies.

FUEL INFORMATION

Important safety precautions

Do not overfill the fuel tank. The pressure in an overfilled tank
may cause leakage and lead to fuel spray and fire.

The fuel system may be under pressure. If the fuel cap is venting
vapor or if you hear a hissing sound, wait until it stops before

completely removing the cap.

Maintenance and Specifications

135

Automotive fuels can cause serious injury or death if misused or
mishandled.

Observe the following guidelines when handling fuel:
• Extinguish all smoking materials

and any open flames before
fueling your vehicle.

• Always turn off the vehicle before

fueling.

• Automotive fuels can be harmful

or fatal if swallowed. If fuel is swallowed, call a physician immediately,
even if no symptoms are immediately apparent. The toxic effects of
fuel may not be visible for hours.

• Avoid inhaling fuel vapors. Inhaling too much fuel vapor of any kind

can lead to eye and respiratory tract irritation. In severe cases,
excessive or prolonged breathing of fuel vapor can cause serious
illness and permanent injury.

• Avoid getting fuel liquid in your eyes. If fuel is splashed in the eyes,

remove contact lenses (if worn), flush with water for 15 minutes and
seek medical attention. Failure to seek proper medical attention could
lead to permanent injury.

• Fuels can also be harmful if absorbed through the skin. If fuel is

splashed on the skin and/or clothing, promptly remove contaminated
clothing and wash skin thoroughly with soap and water. Repeated or
prolonged skin contact with fuel liquid or vapor causes skin irritation.

When refueling always shut the engine off and never allow
sparks or open flames near the filler neck. Never smoke while

refueling. Fuel vapor is extremely hazardous under certain conditions.
Care should be taken to avoid inhaling excess fumes.

The flow of fuel through a fuel pump nozzle can produce static
electricity, which can cause a fire if fuel is pumped into an

ungrounded fuel container.

If you must replace the fuel filler cap, replace it with a genuine
Ford or Motorcraft part. The customer warranty may be void for
any damage to the fuel tank or fuel system if a genuine Ford or
Motorcraft fuel filler cap is not used.

Maintenance and Specifications

136

Refueling

Fuel vapor burns violently and a fuel fire can cause severe
injuries. To help avoid injuries to you and others:

• Read and follow all the instructions on the pump island;
• Turn off your engine when you are refueling;
• Do not smoke if you are near fuel or refueling your vehicle;
• Keep sparks, flames and smoking materials away from fuel;
• Stay outside your vehicle and do not leave the fuel pump unattended

when refueling you vehicle — this is against the law in some places;

• Keep children away from the fuel pump; never let children pump fuel

Use the following guidelines to avoid static build-up when filling an
ungrounded fuel container:
• Place approved fuel container on the ground.

• DO NOT fill a fuel container while it is in the vehicle (including the

cargo area).

• Keep the fuel pump nozzle in contact with the fuel container while

filling.

• DO NOT use a device that would hold the fuel pump handle in the fill

position.

Maintenance and Specifications

137