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Standard Procedure - Quick-Connect Fittings: Disconnecting

WARNING: THE FUEL SYSTEM IS UNDER A CONSTANT PRESSURE (EVEN WITH ENGINE OFF). BEFORE SERVICING ANY FUEL SYSTEM HOSE, FITTING OR LINE, FUEL SYSTEM PRESSURE MUST BE RELEASED. REFER TO FUEL SYSTEM PRESSURE RELEASE PROCEDURE.
CAUTION: The interior components (o-rings, spacers) of some types of quick-connect fitting are not serviced separately. If service parts are not available, do not attempt to repair a damaged fitting or fuel line. If repair is necessary, replace complete fuel line assembly.
  1. Perform fuel pressure release procedure. See STANDARD PROCEDURE - FUEL SYSTEM PRESSURE RELEASE  procedure.
  2. Disconnect negative battery cable from battery.
  3. Clean fitting of any foreign material before disassembly.
  4. 2-Button Type Fitting:  This type of fitting is equipped with a push-button located on each side of quick-connect fitting. Press on both buttons simultaneously for removal. Special tools are not required for disconnection.
    Fig 1: Disconnecting Button Type Fitting
    G01740946Courtesy of DAIMLERCHRYSLER CORP.
  5. Pinch-Type Fitting:  This fitting is equipped with two finger tabs. Pinch both tabs together while removing fitting. Special tools are not required for disconnection.
    Fig 2: Disconnecting Pinch Type Quick-Connect Fitting
    G01740947Courtesy of DAIMLERCHRYSLER CORP.
  6. Single-Tab Type Fitting:  This type of fitting is equipped with a single pull tab. The tab is removable. After tab is removed, quick-connect fitting can be separated from fuel system component. Special tools are not required for disconnection.
    Fig 3: Disconnecting Single-Tab Type Fitting
    G01740948Courtesy of DAIMLERCHRYSLER CORP.
    1. Press release tab on side of fitting to release pull tab. If release tab is not pressed prior to releasing pull tab, pull tab will be damaged. 
      Fig 4: Disconnecting Single-Tab Type Fitting
      G01740949Courtesy of DAIMLERCHRYSLER CORP.
    2. While pressing release tab on side of fitting, use screwdriver to pry up pull tab.
    3. Raise pull tab until it separates from quick-connect fitting.
      Fig 5: Removing Pull Tab
      G01740950Courtesy of DAIMLERCHRYSLER CORP.
  7. Two-Tab Type Fitting:  This type of fitting is equipped with tabs located on both sides of fitting. The tabs are supplied for disconnecting quick-connect fitting from component being serviced.
    Fig 6: Disconnecting Typical 2-Tab Type Fitting
    G01740951Courtesy of DAIMLERCHRYSLER CORP.
    1. To disconnect quick-connect fitting, squeeze plastic retainer tabs against sides of quick-connect fitting with your fingers. Tool use is not required for removal and may damage plastic retainer.
    2. Pull fitting from fuel system component being serviced.
    3. The plastic retainer will remain on component being serviced after fitting is disconnected. The o-rings and spacer will remain in quick-connect fitting connector body.
  8. Plastic Retainer Ring Type Fitting:  This type of fitting can be identified by the use of a full-round plastic retainer ring usually black in color.
    Fig 7: Disconnecting Plastic Retainer Ring Type Fitting
    G01740952Courtesy of DAIMLERCHRYSLER CORP.
    1. To release fuel system component from quick-connect fitting, firmly push fitting towards component being serviced while firmly pushing plastic retainer ring into fitting. With plastic ring depressed, pull fitting from component. The plastic retainer ring must be pressed squarely into fitting body. If this retainer is cocked during removal, it may be difficult to disconnect fitting. Use an open-end wrench on shoulder of plastic retainer ring to aid in disconnection. 
    2. After disconnection, plastic retainer ring will remain with quick-connect fitting connector body.
    3. Inspect fitting connector body, plastic retainer ring and fuel system component for damage. Replace as necessary.
  9. Latch Clips:  Depending on vehicle model and engine, 2 different types of safety latch clips are used. Type-1 is tethered to fuel line and type-2 is not. A special tool will be necessary to disconnect fuel line after latch clip is removed. The latch clip may be used on certain fuel line/fuel rail connection, or to join fuel lines together.
    Fig 8: Identifying Latch Clip-Type 1
    G01740953Courtesy of DAIMLERCHRYSLER CORP.
    Fig 9: Identifying Latch Clip-Type 2
    G01740954Courtesy of DAIMLERCHRYSLER CORP.
    1. Type 1: Pry up on latch clip with a screwdriver.
    2. Type 2: Separate and unlatch 2 small arms on end of clip and swing away from fuel line.
    3. Slide latch clip toward fuel rail while lifting with screwdriver.
    4. Insert special fuel line removal tool (Snap-On number FIH 9055-1 or equivalent) into fuel line. Use tool to release locking fingers in end of line.
      Fig 10: Disconnecting Fuel Line Using Special Tool
      G01740955Courtesy of DAIMLERCHRYSLER CORP.
    5. With special tool still inserted, pull fuel line from fuel rail.
    6. After disconnection, locking fingers will remain within quick-connect fitting at end of fuel line.
  10. Disconnect quick-connect fitting from fuel system component being serviced.
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