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(Topic ID: 218294)

Broken screw won’t come out

By enkiktd

5 years ago

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14 posts
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Latest reply 5 years ago by enkiktd
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Indianapolis 500 Bally, 1995

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#1 5 years ago

VIK

enkiktd

Pinside+ Frequent

Mill Creek, WA

7y 41,150 149 15 6

Working on an Indy 500 and we needed to remove the race track in order to reach and clean the back half of the machine. When removing the screws on the racetrack, they snapped in half, but in a way where they’re still holding between the two brackets and keeping the racetrack on.

I’ve tried a screw extractor kit on the back but it didn’t work; the extractor is also a bit large to fit through the plate.

We’ve tried rotating the screw thread but it doesn’t matter how much or which direction we turn it, it doesn’t move in either direction even though it’s rotating. Tried pulling it out but that doesn’t work. It’s pretty hard to access at a good angle because the racetrack motor won’t allow the ramp to be removed, and I can’t remove the motor due to the ramp.

Any ideas?

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#2 5 years ago

RWH

Pinside member

Norwood, OH

13y 132K 9,925 2 10

Are those washers on the back threaded like a nut? Looks like they can be removed.

#3 5 years ago

ASV

arolden

Pinside member

10y 46,550 975

Drill it out with a thin drill bit.

#4 5 years ago

YOB

Mancave

Pinside+ Addict

10y 114K 3,300

Quoted from arolden:
Drill it out with a thin drill bit.

Agreed, think it may be your only option in this case.

#5 5 years ago

TOM

pinballinreno

Computer Extreme

9y 134K 15,517 31

Carefully (yes, carefully. start with a small bit and work up, go slow) drill out the screws, they might loosen during the drill out. Re-tap the weld nut for a slightly bigger screw if necessary. All fixed.

#6 5 years ago

VIK

enkiktd

Pinside+ Frequent

Mill Creek, WA

7y 41,150 149 15 6

Have attempted to drill it out but still not budging. It’s really strange.

#7 5 years ago

KRH

thirdedition

What The Flip

9y 62,300 950 25

If you can get pliers on them, I would try to continue and thread them in. Meaning try and "tighten" them to get them to come in the other way.

-1

#8 5 years ago

JIM

cpr9999

CPR9999MODS.COM

17y 118K 4,768 29

Or get you small torch and heat them up.
Use wet rag on top so heat doesn’t transfer up.

#9 5 years ago

CRG

Toasterdog

Pinside member

Clearwater, FL

11y 95,550 3,646 2 46

You might go through a few bits, but you need to drill it out IMO. I had a similar issue last week on a reenforced bracket like that.

Do it....just do it.

#10 5 years ago

JMM

Allibaster

Pinside member

Sheridan, WY

12y 87,050 2,053 4 17

Quoted from Toasterdog:
Do it....just do it.

Yup, just some drill bits and muscle.

#11 5 years ago

VIK

enkiktd

Pinside+ Frequent

Mill Creek, WA

7y 41,150 149 15 6

Quoted from thirdedition:
If you can get pliers on them, I would try to continue and thread them in. Meaning try and "tighten" them to get them to come in the other way.

No place to get pliers on it, it’s between the ramp and the racetrack motor, which is mostly our problem. If we could get the ramp out we’d have a lot more room to work, but with the motor there the ramp is blocked.

#12 5 years ago

27dnast

Pinside+ Frequent

11y 140K 8,597

Agree with the others... drill it. Forget the extractor

#13 5 years ago

TOM

pinballinreno

Computer Extreme

9y 134K 15,517 31

OP
Quoted from enkiktd:
Have attempted to drill it out but still not budging. It’s really strange.

If you want to apply heat use a soldering iron if you think its red loctite holding you back. Heat the nut not the screw if possible.

Apply WD-40 to the area.

Use a pin punch and tap the stuck screw lightly 50 to 100 times with a fast regular cadence. Apply heat let cool and do it again.
Vibration will loosen stuck screws. Often you will see the screw move slightly or wobble during the tapping sequence.

Use decent, new or carbide drill bit 3/32 or less. Oil the tip of the drill bit. Try to punch a dent in the screw with a pin punch for the bit to center. Firmly apply the drill motor for a long time, it will cut.

#14 5 years ago

VIK

enkiktd

Pinside+ Frequent

Mill Creek, WA

7y 41,150 149 15 6

Updating with resolution! So drilling out didn’t work, so we took off the side rails and unscrewed the back panel and removed it wholesale with the ramp and the racetrack. With it removed, we were able to separate the ramp finally and that gave us easy access to the broken screws. Used a pair of pliers to remove. Lots of work just to get at two broken screws!

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