(Topic ID: 253915)

Gottlieb ma-988 and ma-989 flipper conversion?


By cp1610

8 months ago



Topic Stats

  • 5 posts
  • 4 Pinsiders participating
  • Latest reply 8 months ago by supermoot
  • Topic is favorited by 1 Pinsider

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    Topic poll

    “Should this conversion be done to older gottlieb games?”

    • Yes (manufacturer always knows better) 0 votes
    • No ( if it isn't broke don't fix it ) 1 vote
      33%
    • This made me leave the current dumpster fire thread 0 votes
    • Hold on a second i need a drink and fresh pop corn 2 votes
      67%

    (3 votes)

    Topic Gallery

    One image has been uploaded to this topic. (View topic image gallery).

    gtb-ma988MA989 (resized).jpg

    #1 8 months ago

    Did some searching here on pinside and have not found any wisdom on the subject.

    Never seen or heard of this until i went to the pinball resource page to look up parts and saw this note http://www.pbresource.com/rebuildkit.html#gtbma988 with a link to this tsb form Permier/Gottlieb in 1987 http://www.pbresource.com/rebuildk/gtb-ma988MA989.jpg
    The ma-988 and ma-989 conversion kit was a field installed fix to solve complaints to the premature wearing out of end of stroke switches on system 80b games.

    So yes 1st thing was to go check my current games again to see if this has been done to see they have not been done. I'm here to see what others have done and hopefully inform other gtb owners to pay closer attention when rebuilding there flippers.
    gtb-ma988MA989 (resized).jpg

    #3 8 months ago

    I have not seen this and I'll be doing a flipper rebuild with a kit from PBR so I'll definitely look into it first.

    #4 8 months ago

    I remember when that bulletin came out. We had done this on several of our system 80 machines back in the day. This kit prevents the end of stroke switch from getting chewed up by the flipper pawl. When the outer blade of the end of stroke switch gets a grove in it or otherwise chewed up, it causes the flipper to get mechanically stuck or "hang up" sometimes. It's worth doing IMO.

    #5 8 months ago

    What KenLayton said. I had a Hollywood Heat's flippers go for years with no problems. When I rebuilt them they started getting stuck a few months later. A groove had worn in the back of the eos switch. I think the metal on the eos may be softer now, or it was just coincidence. I installed the kits and haven't had any problems.

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