Warning

WARNING:
- THE FUEL SUPPLY LINES WILL REMAIN PRESSURIZED AFTER ENGINE SHUTDOWN. WHEN SERVICING FUEL-RELATED COMPONENTS, DO NOT SMOKE OR CARRY LIGHTED TOBACCO OR ANY OPEN FLAME OF ANY TYPE. FLAMMABLE GASES MAY BE PRESENT AND IGNITE RESULTING IN POSSIBLE PERSONAL INJURY.
- DO NOT MODIFY THE SYSTEM CONFIGURATION OR COMPONENTS OR REPLACE COMPONENTS WITH PARTS NOT SPECIALLY DESIGNED FOR USE WITH NATURAL GAS. FORD MOTOR COMPANY HAS SPECIALLY DESIGNED THE MATERIALS, COMPONENTS, AND SYSTEM CONFIGURATION FOR THE 5.4L F-250 NATURAL GAS VEHICLES, AND EACH PARTICULAR SYSTEM IS PRECISELY CALIBRATED FOR EFFICIENT OPERATION THE USE OF DIFFERENT PARTS OR MATERIALS CAN PRODUCE AN UNTESTED CONFIGURATION THAT COULD RESULT IN FIRE OR PERSONAL INJURY, OR CAUSE ENGINE DAMAGE.
- FUEL LINE VENTING IS REQUIRED PRIOR TO FUEL SYSTEM COMPONENT SERVICE
- EYE AND EAR PROTECTION ARE REQUIRED TO BE WORN DURING VENTING OR REMOVAL AND INSTALLATION OF FUEL SYSTEM COMPONENTS.
- THE STATUS (STUCK OPEN STUCK CLOSED, DOES NOT OPERATE OR GOOD) OF EACH FUEL TANK SOLENOID VALVE MUST BE IDENTIFIED PRIOR TO VENTING THE FUEL TANKS.

NOTE:
- It is recommended that venting be performed with a vent stack. Any vent sack installation must be approved by local authorities.
- Do not vent any fuel tank unless the fuel tank of fuel tank solenoid valve is being replaced. Unnecessary venting of good tanks can cause damage to the fuel tank solenoid valve.

1. The procedures are required to be used when venting fuel from the fuel tanks to remove the fuel tanks.