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(Topic ID: 237306)

Gottlieb EM Flipper Rebuild - Problem Removing Roll Pin


By ChipS

1 year ago



Topic Stats

  • 8 posts
  • 7 Pinsiders participating
  • Latest reply 1 year ago by ChipS
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#1 1 year ago

Many thanks to everyone who has helped me get my Surf Champ fully operational! I've now moved on to a full cleaning and rebuild of pop bumpers and flippers. But I've run into a snag with the flippers.

I can't seem to remove the roll pin that holds the plunger/link to the crank/lever. I found instructions in another post: Drill a hole in a block of wood; place the pin in the hole and tap it out using a pin punch. Problem is that I've been tapping (and then some) on the pin punch for half an hour and only moved it about 1/8". I put a drop of 3-in-1 oil around the outside of the pin to try to loosen it up - plunger/link appear to be original equipment. But it's still not budging. Suggestions?

Plunger-link01 (resized).jpgPlunger-link02 (resized).jpgPlunger-link03 (resized).jpg
#2 1 year ago

They always seem to go or not go for me, never ease out slowly..I’d crank up the elbow grease and make sure you have correct size punch.

#3 1 year ago
Quoted from ChipS:

a drop of 3-in-1 oil

Try some penetrating fluid overnight. Deep Creep, PB Blaster, or something similar.

#4 1 year ago

take a pair of vice grips and grab the long side, squeezing the slot together and then try to rotate back and forth while pulling, I just did two this way

#5 1 year ago

Buy some new roll pins use the right size roll pin tool to knock the old one out using a hammer . When removing the old pin sit the flipper shaft between 2 bricks.Use abit of force and they should pop straight out.

#6 1 year ago

Just went through this when rebuilding my flippers. I used a 5/32" punch, which was the perfect size, and I used a bench vise, with the jaws slightly opened, so the roll pin had the gap to clear. I rested the crank assembly on top of the open vise, and tapped the pin out just enough that I could wiggle the old plunger assembly out. It didn't take too much effort, but it took some fiddling because I didn't want to knock the pin all the way out since I was going to reuse it.

#7 1 year ago

Yes I always prefer to use a bench vice for this task-a nice progressive non shock push in particular to get movement started using a small socket to take the protruding end. When re-assembling I also use a spacer to prevent the pawl jaws from closing which prevents appropriate freedom of movement of the plunger/link.

#8 1 year ago

Thanks for all the suggestions! I'm happy to report that the 3-in-1 oil I used last night must have worked some magic overnight and I was able to bang it out without much difficulty this afternoon.

Did the second flipper this afternoon - came out with a little oil and only a dozen taps of the pin punch. Far easier than the first one. Not a fan of this design, that's for sure.

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