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Home >> Plymouth >> 1961 >> Custom 5.9L Eng >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Carter BBD 2-Barrel >> Overhaul >> Disassembly

Carter BBD 2-Barrel: Overhaul: Disassembly

  1. Disconnect and remove fast idle connector rod, then disengage accelerator pump operating rod, then remove vacuum hose between main body and vacuum diaphragm. Remove choke operating link and remove vacuum diaphragm and bracket assembly.
  2. Remove air horn and discard gasket, then disengage accelerator pump plunger from rocker arm by pushing up on bottom of plunger and sliding plunger shaft off hook. Slide plunger out of air horn and remove bowl vent valve, spring and seat.
    NOTE: If either the old plunger or a new plunger is to be used, immerse in gasoline to prevent it drying out.
  3. Remove fuel inlet valve needle, seat and gasket, then remove floats and fulcrum pin. Remove step-up piston screw and slide piston and rods out of well. Remove piston spring and gasket.
  4. Remove main metering jets and gaskets, then remove retaining screws, venturi cluster and gaskets.
    NOTE: Do not remove idle orifice tubes or main vent tubes from venturi.
  5. Invert carburetor and allow accelerating pump inlet and discharge ball checks to drop out into the hand. Take out retaining screws and separate throttle body from main body.
  6. Check choke valve for free operation (if choke shaft sticks in bearings, or valve binds due to gum deposits in air horn, correct by thorough cleaning). Do not remove throttle valves or shaft unless replacement of parts required (manufacturer recommends replacement of throttle body if wear is extreme). To remove valves, mark position of valves on shaft, then remove valve screws
    CAUTION: (Screws are staked, use care not to break screws off in shaft),

    lift valves out and slide shaft out of throttle body.