Fuel Tank: Description and Operation
FUEL HOSESThe hoses used on fuel injected models are of a special type and only hoses marked EFI/EFM may be used as replacements.
FUEL FITTINGS AND CLAMPS
Their are two ways that the fuel lines are attached to various fuel system components. The first way is with a rolled edge type clamp (the purpose of the rolled edge is to prevent the clamp from cutting the fuel hoses).
Quick Connect Fitting Assembly/Disassembly (Except Chassis Fuel Tubes):
The second type of fitting is called a Quick-Connect fuel fitting. The Quick-Connect fittings consist of an O-ring and a plastic retainer tab. The plastic retainer tab has to be removed to disconnect the fitting from the fuel tube.
PRESSURE/VACUUM FILLER CAP
The loss of liquid fuel or vapor is prevented by using a filler cap which releases under 10.9 to 13.45 kPa (1.58 to 1.95 psi). Only caps with these specifications may be used as replacements to maintain the integrity of the fuel system.
ROLL-OVER VALVE
All fuel tanks of the closed type use a roll-over valve mounted on the top of the fuel tank. In addition to the roll-over valve there is a one way check valve mounted on the fuel return line, in the tank, which prevents fuel from backing up into the return line from the tank. Under loss of fuel pressure conditions, or conditions such as roll-over where tank pressure may exceed fuel return pressure, the check valve closes, preventing fuel loss from tank.