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WCFB Rookie Mistake

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  • Fuel System: WCFB Rookie Mistake

    Hey Fellas,
    Took the carb off and removed the air horn; cleaned it up and put it back together (no extra parts!). However, the linkage between the throttle and choke connector rods is now somehow not there: actuating the throttle does not move the choke valve (see pic 5923)and the secondary lock out therefore remains in place. What did I miss during reassembly? I've done this kind of work before, but am at a loss as to what I did wrong this time.
    Thanks...
    Attached Files
    -James

  • #2
    Have you opened the choke butterfly by hand and then checked the release ?? I may not understand what you are saying?

    Comment


    • #3
      Hey Flashback -
      choke moves freely and when engaged by hand, does release the secondary lockout. Problem is, the choke should be actuated by the throttle but even through the full range of motion of throttle, choke does not move. Thanks for the ideas - please keep them coming!
      -James

      Comment


      • #4
        The 2 Cams look to me like they are mis-clocked to each other on those 2 lower Shafts, if that makes ANY sense at all!
        I am looking at the Lower part of the Carb. in Pic #1.

        The small Cam to the front looks like it is jamming the Large Rear one, NO?
        StudeRich
        Second Generation Stude Driver,
        Proud '54 Starliner Owner

        Comment


        • #5
          Are you saying your choke won't close ? Is the choke cover adjusted properly. What do you mean the choke should be actuated by the throttle?

          Comment


          • #6
            StudeRich - I do suspect something’s amiss with the cams and will have a look again tomorrow. I’ve been comparing pictures that I can find in the manual and elsewhere and the discrepancy isn’t obvious to me.

            Flashback - choke will close and open but only by hand; which leads to your second question: if I open the throttle all the way, the choke should open as well. Like I said, that linkage/connection isn’t there anymore. The choke is just flopping around.

            Appreciate the help! Would be great to get her running again this weekend....
            -James

            Comment


            • #7
              Looking at 2 wcfb carbs on bench, the 2 cams that have joining arms are at 11:30 on both. outer cam w/ arm is fast idle, inner cam is choke cam, next to secondary lockout cam. Luck Doofus

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              • #8
                Usually when something like this happens to me I have to come at it fresh the next day and then re-examine everything. Operate the linkage by hand and study what moves what. You will see where something doesn't work in the proper relationship to another part. It happens to all of us.
                "In the heart of Arkansas."
                Searcy, Arkansas
                1952 Commander 2 door. Really fine 259.
                1952 2R pickup

                Comment


                • #9
                  I've studied and attached two pics -- I think a key is in understanding what the throttle should touch when opening (I think the fast idle cam but can't see how that's possible - see red on 5927.jpg): from full closed position, throttle does connect with fast idle cam but fast idle cam rotates only a few degrees and cannot cause the lower tab on dechoke cam to contact the secondary lockout lever as the throttle reaches its physical end of travel -- see green on 5927.jpg.

                  It's a head-full. Hope the pictures help you guys see what's wrong.
                  -James

                  Comment


                  • #10
                    There is not contact of the choke unloader until nearly full throttle. It's how it is designed. They don't want the secondaries to open until the engine is warmed up enough to have the choke off. Hold the choke butterfly open, and check if the lock mechanism drops under free weight. It should. Otherwise you have the springs wound wrong on the lock out. The setting is in the manuals. Close the choke, to a specified gauge, and adjust the fast idle link to the desired step to the primary throttle shaft, then tighten the choke clamp. The opening of the choke is by the vacuum piston pull off, and manifold vacuum, vs the spring pressure of the thermostatic spring under the bakelite cap.
                    Bez Auto Alchemy
                    573-318-8948
                    http://bezautoalchemy.com


                    "Don't believe every internet quote" Abe Lincoln

                    Comment


                    • #11
                      Yessir, bezhawk. 100% understood.
                      Holding choke open by hand, lockout does drop; what I cannot seem to do is get it to drop only by throttle lever action as the throttle reaches it's physical end of travel before being tripping the lockout. If I'm not mistaken, all primary and secondary action is by the throttle. (?)
                      -James

                      Comment


                      • #12
                        Then the tang on the throttle arm is bent. It is supposed to trip about the last 1/4" of full throttle. Before that, it's not supposed to unlock the secondaries. Perhaps the throttle shaft got twisted? Just guessing not seeing the carb in hand. Also, check that the secondary operating link on the opposite side of the carb isn't installed upside down. It makes a difference.
                        Bez Auto Alchemy
                        573-318-8948
                        http://bezautoalchemy.com


                        "Don't believe every internet quote" Abe Lincoln

                        Comment


                        • #13
                          Thanks, bezhawk. Musta been a hum-dinger to bend that heavy gauge metal... I'll look into that!
                          -James

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