Econoline E350 1 Ton V8-5.4L CNG VIN M (1999)
fuel tank. See Figure 5.
6.
Remove the P-clip and line clamp bolt securing the fuel line leading toward the mid-ship fuel tank, the P-clip securing the line to the No. 5
crossmember and, if equipped with the 4th fuel tank, remove the P-clip for the No. 4 crossmember.
7.
Disengage the rear high-pressure fuel line from the two (2) frame retaining clips and remove the line from the vehicle.
NOTE
If you are working on a 2001-2003 E-Series that is involved in Emission Recall 04E09 - Fitting Connector Replacement (Procedure F),
complete that service now before continuing with fuel line installation.
INSTALLATION
NOTE:
When connecting the new fuel line(s) to the fuel tanks and the mid high-pressure fuel line, only hand-tighten the connection during initial
installation. Once initial installation is complete, you will be instructed to tighten all fitting connections to specification.
CAUTION:
When tightening the fuel line connections, a crowfoot adapter must be used. Using a crowfoot adapter on a torque wrench increases the length
of the tool and changes the actual torque value. To achieve the proper torque on the fasteners, you must use the formula supplied in this
document to calculate the proper setting for the torque wrench/crowfoot you are using.
1.
CAUTION: To prevent dirt and debris from entering the new fuel line assembly, leave all caps on the new lines until they are installed.
Position the new rear high-pressure fuel line and secure it in the two (2) frame retaining clips.
2.
WARNING: DO NOT USE ANY SOLVENTS OR COMPRESSED AIR TO CLEAN ANY COMPONENTS OF THE CNG FUEL SYSTEM.
SOLVENTS MAY DETERIORATE THE 0-RINGS AND AFFECT THEIR SEALING CAPABILITIES. COMPRESSED AIR AND NATURAL
GAS FORM A HIGHLY COMBUSTIBLE MIXTURE.
Clean all fitting connections on the vehicle with a clean, dry cloth.
3.
CAUTION: Apply the lubricant to the 0-rings sparingly. DO NOT allow any excess lubricant to touch the threads of the fittings. Any lubricant on
the threads will adversely affect the tightening properties and may cause damage to the connectors.
Lubricate all 0-rings on the new fuel line(s) with Motorcraft Super Premium SAE 5W-20 Motor Oil X0-5W20-QSP or equivalent meeting Ford
specification WSS-M2C153-H.
4.
Connect the rear high-pressure fuel line to the mid-ship tank and the mid high-pressure fuel line only. Do not tighten these connections at this time.
5.
NOTE: This step only applies to 1997 through 2000 Model Year vehicles (vehicles not involved in Emission Recall 04E09).
Loosen the fitting on the forward aft-axle tank.
CAUTION!
The torque specification for the fittings is very crucial. Damage to the fitting may occur, which will cause a fuel leak. The Torque Wrench
Setting Calculator provides the information you need to ensure that the fittings are tightened to the proper torque value.
6.
Loosely connect the fuel line to the fitting on the aft-axle tank. Allow the fitting to rotate inboard approximately 15-20 degrees, then hold the
fitting in place and tighten it to the calculated torque specification to achieve 42 Nm (31 lb-ft).
7.
Tighten the fuel line connections to the mid-ship tank and the mid high-pressure fuel line to the calculated torque specification to achieve 48 Nm
(35 lb-ft).
8.
Install the P-clip and the fuel line clamp to secure the fuel line leading toward the mid-ship fuel tank, and then install the P-clip securing the fuel
line to the No.5 crossmember. Tighten the bolts to 12 Nm (9 lb-in).
9.
NOTE: This step applies only to cutaway models and vehicles equipped with the 4th fuel tank.
On cutaway models, remove the hex cap from the fitting on the new high-pressure fuel line and connect the fuel fill connection. Tighten the
connections to the calculated torque specification to achieve 48 Nm (35 lb-ft).
On non-cutaway models equipped with the 4th fuel tank, remove the hex cap from the fitting on the new rear high-pressure fuel line and install the
extension line between the rear high pressure fuel line and the line leading toward the 4th tank. Tighten the connections to the calculated torque
specification to achieve 48 Nm (35 lb-ft).
