Ford F150 Pickup. Manual — part 1147

Fig. 48: Identifying Tightening Torque Of Fuel Tank Solenoid Manual Lockdown Valve
Courtesy of FORD MOTOR CO.

17. Turn in the manual lockdown valve jackscrew on the fuel tank solenoid valve.

2003 Ford Pickup F150

2003 GENERAL INFORMATION Fuel System-General Information-Bi-Fuel - F150 Pickup

Fig. 49: Identifying Tightening Torque Of Manual Lockdown Valve Jackscrew
Courtesy of FORD MOTOR CO.

18. Repeat the procedure until all affected tanks are vented.

19. Install the fuel fill line onto the fuel fill valve.

2003 Ford Pickup F150

2003 GENERAL INFORMATION Fuel System-General Information-Bi-Fuel - F150 Pickup

Fig. 50: Installing Fuel Fill Line Onto Fuel Fill Valve
Courtesy of FORD MOTOR CO.

DRAINING - COALESCER

WARNING:

Do not modify the system configuration or components or replace
components with components no specifically designed for use with
natural gas. Ford Motor Company has specifically designed the materials,
components and system configuration for the 5.4L F-Series Bi-Fuel
vehicle, and each particular system is precisely calibrated for efficient
operation. The use of different parts or materials can produce an untested
configuration that can result in fire or personal injury or cause engine
damage.

WARNING:

It is important that your bi-fuel vehicle be correctly maintained by Ford bi-
fuel trained personnel. If a concern occurs, it is important that correctly
trained personnel diagnose the cause. If a concern relates to the fuel
system, correct part replacement is imperative to keep your vehicle
operating at normal performance. Bi-fuel components and gasoline
specific components are not interchangeable. If your vehicle is not
serviced in accordance with bi-fuel service procedures, damage can
occur and your warranty may be invalidated.

2003 Ford Pickup F150

2003 GENERAL INFORMATION Fuel System-General Information-Bi-Fuel - F150 Pickup

1. Relieve the Bi-fuel system fuel pressure. Refer to PRESSURE RELIEF - Natural Gas Bi-Fuel

System .

2. Raise the vehicle on the hoist.

WARNING:

Fuel supply lines are always pressurized. When servicing fuel related
components, do not smoke or carry lighted tobacco or an open flame of
any type. Flammable mixtures may be present and can ignite, resulting in
personal injury.

WARNING:

The natural gas fuel system is always pressurized to 655 kPa (95 psi)
downstream of the fuel pressure regulator and up to 24821 kPa (3600 psi)
upstream of the fuel pressure regulator. Use care when servicing the fuel
system or personal injury can occur.

WARNING:

The natural gas fuel supply manifold is pressurized to 655 kPa (95 psi).
Fuel pressure must be relieved prior to any fuel system service.

WARNING:

The fuel system pressure must be relieved before any component can be
removed. The fuel tanks must be evacuated prior to tank removal.
Removal of components without pressure relief or tank evacuation can
cause natural gas to escape into the air and cause injury or death.

NOTE:

There is an O-ring attached to the drain plug. The O-ring must be replaced
each time the drain plug is removed.

2003 Ford Pickup F150

2003 GENERAL INFORMATION Fuel System-General Information-Bi-Fuel - F150 Pickup