See Figure 1
The spring lock coupling is a fuel line coupling held together by a garter spring inside a circular cage. When the coupling is connected, the flared end of the female fitting slips behind the garter spring inside the cage of the male fitting. The garter spring and cage then prevent the flared end of the female fitting from pulling out of the cage. As a redundant locking feature, a horseshoe-shaped retaining clip is used to improve the retaining ability of the spring lock coupling.
REMOVAL & INSTALLATION
See Figure 2
- Disconnect the negative battery cable, then properly relieve the fuel system pressure. For details, please refer to the procedure covered in the appropriate fuel system in this section.
- Using your hand only, remove the retaining clip from the spring lock coupling. Do NOT use any sharp tool or screwdriver because it may damage the coupling.
- Twist the fitting to free it from any adhesion at the O-ring seals.
- Fit Spring Lock Coupling Disconnect Tool D87L-9280-A ( 3 / 8 in.) or D87L-9280-B ( 1 / 2 in.), or equivalent, to coupling.
- Close the tool and push into the open side of the cage to expand the garter spring and release the female fitting.
- After the garter spring is expanded, pull the fittings apart.
- Remove the tool from the disconnected coupling.
- Make sure that the garter spring is in the cage of the male fitting. If the garter spring is missing, install a new spring by pushing it into the cage opening. If the garter spring is damaged, remove it from the cage with a small wire hook (do NOT use a screwdriver) and install a new spring.
- Clean all dirt and/or foreign material from both pieces of the coupling.
Flexible fuel vehicles use special Methanol compatible O-rings.
- Replace any missing or damaged O-rings. Only use the fuel resistant O-rings specified in the accompanying figure. For all vehicles except flexible fuel vehicles, lubricate the male fitting, O-rings and the inside of the female fitting with clean engine oil. For flexible fuel vehicles, lubricate with oil that has an API designation of Multi-Fuel Vehicles (MFV).
Use only the specified (brown) O-rings because they are made of a special material. The use of other types of O-rings, may cause the connection to leak during engine operation.
- Fit the female fitting to the male fitting and push until the garter spring snaps over the flared end of the female fitting.
- Make sure the coupling is engaged or fastened securely by pulling on the fitting and visually checking to make sure the garter spring is over the flared end of the female fitting.
All vehicles require the large black clip to be installed on the supply-side fuel line and the small grey clip to be installed on the return-side fuel line.
- Position the retaining clip over the metal portion of the spring lock coupling. Firmly push the retaining clip onto the spring lock coupling. Make sure that the horseshoe portion of the clip is over the coupling. Do not install the retaining clip over the rubber fuel line.