Fuel Line Coupler: Description and Operation

Fig. 2 Plastic Quick-Connect Fittings:

QUICK-CONNECT FITTINGS
Different types of quick-connect fittings are used to attach various fuel system components. These are: a single-tab type, a two-tab type or a plastic retainer ring type. Some are equipped with safety latch clips. Refer to the Removal/Installation procedure for more information.

CAUTION: The interior components (0-rings, spacers) of quick-connect fitting are not serviced separately. Do not attempt to repair damaged fittings or fuel lines/tubes. If repair is necessary, replace the complete fuel tube assembly.

Fuel tubes connect fuel system components with plastic quick-connect fuel fittings. The fitting contains non-serviceable 0-ring seals (Fig. 2).

CAUTION: Quick-connect fittings are not serviced separately. Do not attempt to repair damaged quick-connect fittings or fuel tubes. Replace the complete fuel tube/quick-connect fitting assembly.

The quick-connect fitting consists of the 0-rings, retainer and casing (Fig. 2). When the fuel tube enters the fitting, the retainer locks the shoulder of the nipple in place and the 0-rings seal the tube.

Fig. 3 Metal Quick-Connect Fittings:

METAL QUICK CONNECT FITTINGS
The fuel filter outlet and fuel rail use metal quick- connect fittings. The fitting contains non-serviceable sealed 0-rings. The fittings contain a plastic disconnect tool (release ring). Use special tool 6751 to disconnect and connect the fittings at the fuel rail. Special tool 6751 could also be used at the fuel filter outlet.

The quick-connect fitting consists of the 0-rings, casing, disconnect tool and a retainer (Fig. 3). When the fuel tube enters the fitting, the retainer locks the shoulder of the nipple in place and the 0-rings seal the tube.

CAUTION: Quick-connect fittings are not serviced separately. Do not attempt to repair damaged quick-connect fittings or fuel tubes. Replace the complete fuel tube/quick-connect fitting assembly.

When installing fuel tubes, route them in the holders along the frame rail, fuel tank and the rear of the engine.