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  • Distributor Indexing

    I have a distributor that will index going from the 5 to the 6. The rollers are adjusted properly and it has a black roughtop AMF belt. I don't have any problems with any other pin slot. I beleive it might be the linear arm that runs on the inside of the large cam because that is where the arm goes forward very fast following the cam, but wanted another opinion.

    Terry

  • #2
    Re: Distributor Indexing

    Well, according to the AMF bible, the most difficult part of the distributor travel is between the 6 and 10... 5 to 6 is a left-horizontal movement from center, suggesting that maybe the 6030 spring, next to the safety link is bunching up, or the link may be bottoming out, causing it to bind up and force it's way past it. I haven't really studied the exact cam follower positioning and operation when indexing between bin pockets, but what you said about the travel of the follower on the cam may be it... are the followers binding, or maybe the cam track is damaged or worn?
    <span style="font-style: italic">Educatio est omnium efficacissima forma rebellionis</span>

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    • #3
      Re: Distributor Indexing

      Terry: Re-check those rollers. When your dist. extends from the 5 to the 6 and your dist index's your rollers are 95% to blame. Check again to see that your carriage is paralell. Other problems, your carriage tubes are bent or have nicks in it.

      deadwood
      Well thats just like your opinion man...

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      • #4
        Re: Distributor Indexing

        Adjust the distributor as follows:

        1. Adjust rollers to spec or a little looser.

        2. Adjust trip arms so athey index in all positions.

        3. Adjust stop blade height by channelocks and bending rear trip arm support bracket to proper height.

        4.Make the dist just barely index from 6 to 10 by clutch tension.

        5. Add an additional 1/4 turn so it always indexes.

        6. Adjust linear spring to return carriage to #1 position.

        7. Note how hard carriaage moves forward from 8 to 5 position.

        8. Stretch linear spring to reduce how hard carriage hits or adjust trip arms looser to avoid indexing without pins.

        Jerry

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        • #5
          Re: Distributor Indexing

          If that does not work chuck the spare dist on the problematic pinspotter.

          Jerry

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          • #6
            Re: Distributor Indexing

            Terry, try stretching the linear spring out to the end of the dist.. If the carriage lags behind, sometimes it becomes fully extended at the exact same time as the tab on the clutch hits the stop blade. Its a timing thing.

            If thats not the problem try a new 'trip arm spring' or clutch plate &amp; stop blade.

            Comment


            • #7
              Re: Distributor Indexing

              Originally posted by 82/70 king:
              Adjust the distributor as follows:

              3. Adjust stop blade height by channelocks and bending rear trip arm support bracket to proper height.

              7. Note how hard carriage moves forward from 8 to 5 position.

              8. Stretch linear spring to reduce how hard carriage hits or adjust trip arms looser to avoid indexing without pins.

              Jerry
              <font size="2" face="Verdana, Helvetica, sans-serif">i agree with those. also i adjust the stop blades to be a little over the clutch stop.

              a quick short cut, advance the timing on the dist a notch or two (make it so the dot on the cam is under the pinion at the head pin)

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              • #8
                Re: Distributor Indexing

                Terry,

                Try removing the linear spring completely. AMF rough tops are sometimes stiff enough to extend the carriage on their own. If the dist will extend normally, from the 9 to the 1 without the spring, leave it off. Be aware that it may need to be reinstalled when the belt breaks in.

                I have several distributors running flawlessly without linear springs.

                [img]/content/btubb/images/%%GRAEMLIN_URL%%/usflag.jpg[/img]

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                • #9
                  Re: Distributor Indexing

                  Jerry:
                  I am a little confused I have always adjusted the stop blade by just loosening the bolt that holds it to the casting and moving it up or down. Am I doing it the wrong way?

                  Thanks for all your help

                  Terry

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                  • #10
                    Re: Distributor Indexing

                    Terry, What center are you at? 285, 369?

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                    • #11
                      Re: Distributor Indexing

                      Sometime there is not enough adjustment that way.

                      Otherwise you have to adjust the trip arm rod to get the proper stop blade height and I do not like to do that.

                      Adjust your stop blade with the trip arm rod disconnected or the carb linkage on.

                      Jerry

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                      • #12
                        Re: Distributor Indexing

                        is your dist return spring yes the one on the right that pulls the dist to the right, to tight that the dist clutch cant over ride the pressure moving the dist to the left, i have seen to many centres with this spring cable tied back, so of corse people have to run higher clutch tensions.... i hope this helps..

                        Comment

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