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Carter BBD 2-Barrel: Overhaul: Disassembly

  1. Place carburetor on stand and remove retaining clip from accelerator pump arm link and remove link.
  2. Remove cover plate from over step-up piston and remove gasket. Remove locks and screws from accelerator pump arm and vacuum piston rod lifter. Slide pump lever out of air horn.
  3. Lift vacuum piston and step-up rods up and out of air horn as an assembly. Remove the vacuum piston spring. Remove choke vacuum diaphragm hose. Disconnect clips and remove link from choke housing lever and choke lever.
  4. On American Motors models, rotate bowl vent assembly up out of bowl as far as possible and remove rubber valve seal.
  5. On all models, remove screw and lever from end of choke shaft. Remove choke vacuum break diaphragm. On American Motors models, remove automatic choke assembly. On all models, remove fast idle cam retaining screw and remove fast idle cam, linkage and clip.
  6. Remove screws securing air horn and lift air horn up and away from main body. Discard gasket. Turn air horn upside-down and compress accelerator pump drive spring. Remove "S" link from pump shaft. Remove pump assembly.
  7. Remove fuel inlet needle valve, seat and gasket from main body. Carefully lift out float fulcrum pin retainer and baffle. Lift out floats and fulcrum pin. Remove main metering jets.
  8. Remove venturi cluster screws. Lift cluster and gaskets away from main body. Discard gaskets. DO NOT remove idle orifice tubes or main vent tubes from cluster. They may be cleaned with solvent and dried with compressed air while assembled.
  9. Turn carburetor upside-down and catch accelerator pump discharge and intake check balls as they fall out.
    NOTE: 1978 American Motors vehicles with carburetor date code "K718", suffix "A" (on metal identification tag) or later have a redesigned accelerator pump. There is no check ball or drilled passage at bottom of pump well.
  10. Turn idle limiter caps to stop. Remove plastic caps from idle mixture screws. Be sure to count number of turns it takes to set screws for reassembly reference. Remove screws and springs.
  11. Remove screws and separate throttle body from main body. Discard gasket. Check choke plate in air horn for freedom of movement. If any sticking or binding is evident, clean thoroughly.
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