Fuel Line Coupler: Service and Repair

Fig. 9 Plastic Quick-Connect Fitting/Fuel Tube Connection:

QUICK-CONNECT FITTINGS

NOTE: When disconnecting a quick-connect fitting, the retainer will remain on the fuel tube nipple.

WARNING: Release fuel system pressure before disconnecting a quick-connect fittings.

REMOVAL
1. Disconnect negative cable from battery.
2. Perform Fuel Pressure Release Procedure.
3. Squeeze retainer tabs together and pull fuel tube/quick-connect fitting assembly off of fuel tube nipple.
- The retainer will remain on fuel tube.

CAUTION: Never install a quick-connect fitting without the retainer being either on the fuel tube or already in the quick-connect fitting. In either case, ensure the retainer locks securely into the quick- connect fitting by firmly pulling on fuel tube and fitting to ensure it is secured.

INSTALLATION
1. Using a dean lint free cloth, clean the fuel tube nipple and retainer.
2. Prior to connecting the fitting to the fuel tube, coat the fuel tube nipple with clean 30 weight engine oil.
3. Push the quick-connect fitting over the fuel tube until the retainer seats and a click is heard.
4. The plastic quick-connect fitting has windows in the sides of the casing. When the fitting completely attaches to the fuel tube, the retainer locking ears and the fuel tube shoulder are visible in the windows. If they are not visible, the retainer was not properly installed (Fig. 9). Do not rely upon the audible click to confirm a secure connection.

CAUTION: When using the ASD Fuel System Test, the Auto Shutdown (ASD) Relay remains energized for either 7 minutes, until the test is stopped, or until the ignition switch is turned to the Off position.

5. Use the DRB scan tool ASD Fuel System Test to pressurize the fuel system. Check for leaks.

Fig. 10 Plastic Retainer Ring Type Fitting:

PLASTIC RETAINER RING TYPE FITTING

NOTE: This type of fitting can be identified by the use of a full-round plastic retainer ring (Fig. 10) usually black in color.

CAUTION: The interior components (0-rings, spacers, retainers) of this type 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.

WARNING: The fuel system is under a constant pressure (even with the engine off). Before servicing any fuel system hoses, fittings or lines, the fuel system pressure must be released.

DISCONNECTION/CONNECTION
1. Disconnect negative battery cable from the battery.
2. Perform the fuel pressure release procedure. Refer to the Fuel Pressure Release Procedure.
3. Clean the fitting of any foreign material before disassembly
4. To release the fuel system component from the quick-connect fitting, firmly push the fitting towards the component being serviced while firmly pushing the plastic retainer ring into the fitting (Fig. 10).
- With the plastic ring depressed, pull the fitting from the component.
- The plastic retainer ring must be pressed squarely into the fitting body.
- If this retainer is cocked during removal, it may be difficult to disconnect fitting.
- Use an open-end wrench on the shoulder of the plastic retainer ring to aid in disconnection.
5. After disconnection, the plastic retainer ring will remain with the quick-connect fitting connector body
6. Inspect fitting connector body, plastic retainer ring and fuel system component for damage. Replace as necessary.
7. Prior to connecting the quick-connect fitting to component being serviced, check condition of fitting and component.
- Clean the parts with a lint-free cloth. Lubricate them with clean engine oil.
8. Insert the quick-connect fitting into the component being serviced until a click is felt.
9. Verify a locked condition by firmly pulling on fuel tube and fitting (15-30 lbs.).
10. Connect negative battery cable to battery.
11. Start engine and check for leaks.