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A/2-J back preference bar geometry changes

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  • A/2-J back preference bar geometry changes

    Gentlemen:
    Was at a new house today,(new to me anyways) and one of their big problems, involved P. bars, either relocking after odd lane ball went by unlatch cam, or light weight balls not completing roll into Y switch. For years I have been changing spring geometry on P bars, involving little more cost than a 2 1/2 bolt and a starter bell crank spring. If any interest expressed would be glad to post details. Have changed all the late mdl. P bars at all the houses I go to, and thus have never had a request to investigate a preference problem other than a rod end. But the new house reminded me of the need
    Roscoe
    rfm

  • #2
    Re: A/2-J back preference bar geometry changes

    I have been playing with various springs on the pref.I have seen at my house where the lightweight balls got stuck at the ball stop so,i changed spring tension and then the balls drop on through but...the pref.tended to re-lock due to the spring being too light.Prefs.are in good adjustment but a few just like to pop back up and cause a ball call,then the chasers un-hook the spring on the odd lane side.I'd like to hear more on the subject.

    Comment


    • #3
      Re: A/2-J back preference bar geometry changes

      I have all my "Y" switches sprung towards the odd lane with a light spring, also I shimmed my even lane return tracks up with about 4 washers. The six pound balls seem to have a problem making it to the accelerator. After this modification we have had no problems with the lighter balls getting into the accelerator. After shimming the tracks up the balls have a little more momentum on the even lane, and with the "Y" switch sprung towards the odd lane the ball does not have to push it out of the way.

      Jerrid
      and then he said, "on your death bed, you will receive total consciousness" so I got that going for me...... which is nice!

      Comment


      • #4
        Re: A/2-J back preference bar geometry changes

        I am very interested Roscoe,Please post.I have a small modification on our pinsetters but am always interested in ideas.We usally average 3 preferance locks a month for 116 pinsetters.
        Thanks in advance
        Peanut
        Peanut

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        • #5
          Re: A/2-J back preference bar geometry changes

          The object of these changes is to provide a more positive angle for the spring, 12-502167, to keep the 12-501236 hook unlocked in the down position, while lessening the tension on the 12-502138 ball stop, with that in mind.
          First remove the bolt, 10-435501, discard bolt save spacer 10-386082. Remove bolt 11-001350, and reinstall it and spacer in place of bolt 10-435501, with head of bolt to approach. Replace bolt(11-001350), with a 2 1/2 x 3/8 bolt with the nut towards the approach. Reverse spring pin in stop bracket so spring eye is on rear side bracket. Rehook spring 12-502167, to bottom eye of 12-502136 hook and other end to newly installed, 2 1/2 in bolt, put self locking nut on bolt to keep spring on threads.
          Obtain a 12-100102 spring(inner reset lever) or any like spring and install it on the spring pin previously reversed on the stop bracket, and the end of the bolt,no.11-001350 the spring will ride on the threads without a backup nut. Occasionly a little more spring tension is needed on the odd no. mch but easily attained by hooking spring 12-502144 on front of washer instead of the center of same, all adj still have to be correct and a well lubed unit, but this provides a positive unlock with a lot less tension on ball stop bracket.
          Roscoe
          rfm

          Comment


          • #6
            Re: A/2-J back preference bar geometry changes

            Hey Roscoe!!

            I just tried that modification to the preference rods on a pair of lanes...

            I have to say, that next to self-adhesive ball wheel kickers/strips, that it is the best 3 minute modification to a pinsetter I have EVER seen!

            I highly recommend you other mechanics give it a try. I am gonna order the rest of the 12-100102 springs that I need, on my next parts order. I may never have another preference rod headache again.

            Thanks for the info Roscoe!

            Jack McQuaide
            Wookie

            Comment


            • #7
              Re: A/2-J back preference bar geometry changes

              Finally got around to deciphering part numbers and actually trying this modification out.

              Gotta say it's GREAT!!! Had one P-bar that just loved to lock at the wrong time on me, after modifying, couldn't get it to falsely lock even swatting the odd lane's release lever harder than I'd ever dare to with the old geometry.

              Thumbs up and hat's off roscoe, this one is BETTER THAN GREAT.

              Many thanks, man, a $3 permanent cure to a bad design (thinking the spring cost 2.50, didn't look at the price)

              Kevin

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              • #8
                Re: A/2-J back preference bar geometry changes

                The spring cost 7.93 from Brunswick.(I know because this morning I ordered 20 more to do the rest of the house) I am sure a cheaper replacement could be found but don't have the time to look at this point. I just got around to trying the modification to a couple pair about a week ago. Thanks Roscoe, that is an ingenious modification, can't wait till I get the rest of my springs so I can do the rest of the house.

                Jerrid

                [This message has been edited by jerrid (edited 10-04-2000).]
                and then he said, "on your death bed, you will receive total consciousness" so I got that going for me...... which is nice!

                Comment


                • #9
                  Re: A/2-J back preference bar geometry changes

                  I'd like to try this mod hopefully soon we don't have very many issues here but there is a couple machines I think that would benifit from it thanks for posting this thread back in the day still might be helpful I hope.
                  Thank You All! For All the prayers and and the out pouring of good spirits in my time of need greatly appreciated!

                  Comment


                  • #10
                    Re: A/2-J back preference bar geometry changes

                    Looks like a really nice mod Roscoe, thanks for resurrecting it!

                    DD
                    http://www.popevil.com

                    http://www.facebook.com/popevil

                    http://www.dandirito.smugmug.com

                    Comment


                    • #11
                      Re: A/2-J back preference bar geometry changes

                      Quote:]Looks like a really nice mod Roscoe, thanks for resurrecting it! [/QUOTE]
                      Hey, DD, I am juist down the road in Holland. Which house in Muskegon you working?
                      And BTW, what is with that Flash welcome page with no links?
                      For as in Adam all die, so in Christ all will be made alive

                      Comment


                      • #12
                        Re: A/2-J back preference bar geometry changes

                        Another version of this mod is out there...and is adjustable.

                        http://www.bowltech.com/forums/showt...707#post189707
                        TSM & TSM Training Development
                        Main Event Entertainment
                        480-620-6758 for help or information

                        Comment


                        • #13
                          Re: A/2-J back preference bar geometry changes

                          I remember you showing us this mod steve thanks for posting I was looking for that when I found this thread. thanks again.
                          Thank You All! For All the prayers and and the out pouring of good spirits in my time of need greatly appreciated!

                          Comment

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