(Topic ID: 5522)

How to take magnet core out for replacement


By The_Dude_Abides

8 years ago



Topic Stats

  • 76 posts
  • 35 Pinsiders participating
  • Latest reply 9 months ago by flynnibus
  • Topic is favorited by 28 Pinsiders

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core2_(resized).jpg
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There are 76 posts in this topic. You are on page 2 of 2.
#51 4 years ago
Quoted from Syco54645:

Please report back how you do it.

May be a while before i get to it but i certainly will.

3 weeks later
#53 4 years ago
Quoted from scasey:

I use a coil stop to unscrew the magnet cores. It fits in there perfectly, then I attach some vice grips and turn. It works great.

I just did mine on the wolverine magnet on XMen. The coil stop/Vice grip worked perfect. Thanks for the suggestion.

#54 4 years ago
Quoted from TomGWI:

I just did mine on the wolverine magnet on XMen. The coil stop/Vice grip worked perfect. Thanks for the suggestion.

Was the magnet core the cheap kind or the good one? I have heard the cheap ones mushroom badly. I have an X-Men and worry about this.

#55 4 years ago

It was mushrooming but not badly enough to remove it. The edges were splaying out. It could be ground done and reused. I put in a replacement I bought from pinball life.

8 months later
#56 3 years ago
Quoted from TomGWI:

I just did mine on the wolverine magnet on XMen. The coil stop/Vice grip worked perfect. Thanks for the suggestion.

I worked on two magnet cores... the first one came out without a lot of issue, but the second will not budge.

I tried heat, I soaked it with WD-40 three times overnight but that solvent doesn't seem to work on loctite (if that's there... none visible). I destroyed a flat wrench trying to use it as leverage in the magnet notch, tried the biggest flathead screwdriver you can purchase at the hardware store, but that slot wasn't made for a screwdriver. I can't find a spare coil stop, so I gave up and slapped it back on the game. At this point I'd rather waste money on a new assembly than wasting time and money at a hardware store trying to figure out how to work around Stern's lazy mechanical design that requires loctite.

#57 3 years ago

Drag link socket and impact wrench, zip and its out.

#58 3 years ago
Quoted from Baiter:

I tried heat, I soaked it with WD-40 three times overnight but that solvent doesn't seem to work on loctite (if that's there... none visible). I destroyed a flat wrench trying to use it as leverage in the magnet notch, tried the biggest flathead screwdriver you can purchase at the hardware store, but that slot wasn't made for a screwdriver. I can't find a spare coil stop, so I gave up and slapped it back on the game. At this point I'd rather waste money on a new assembly than wasting time and money at a hardware store trying to figure out how to work around Stern's lazy mechanical design that requires loctite.

For me, it was a combination of heat, large adjustable wrench on the nut, and a large vice grips on the core itself. Oh and also 2 and a half hours of swearing and giving up. (Had to pull it up through the top of the playfield due to mushrooming).

#59 3 years ago
Quoted from TomGWI:

I just did mine on the wolverine magnet on XMen. The coil stop/Vice grip worked perfect. Thanks for the suggestion.

This worked perfectly for me as well on both the magnets on x-men. If you don't have a spare coil stop it's worth taking one off a flipper to use. I had a spare stop and used a large adjustable wrench to grab it. The core just turned right out.

#60 3 years ago
Quoted from Out-West:

Drag link socket and impact wrench, zip and its out.

This should never, ever be attempted on a mushroomed core. There is a good chance for serious playfield damage if the nut and core both spin together and force the core down through the playfield.

#61 3 years ago

Alright looks like I should buy vice grips or a drag link socket and try again. Every once in a while I wish I had a vice for tasks like this.

Quoted from ryanwanger:

For me, it was a combination of heat, large adjustable wrench on the nut, and a large vice grips on the core itself. Oh and also 2 and a half hours of swearing and giving up. (Had to pull it up through the top of the playfield due to mushrooming).

If you use vice grips on the core itself it would damage the threads that still need to screw through the nut to get it out of the playfield... I assume it didn't damage the threads that much?

#62 3 years ago

i need to do this on my XM are there higher quality replacements?

#63 3 years ago
Quoted from rai:

i need to do this on my XM are there higher quality replacements?

I believe the ones at Pinball Life are considered the best. I could be wrong.

#64 3 years ago

My magnet core will not give way. At this point 2 of the 4 welds on the base have cracked, and I've scraped, bent, or dinged up every piece of metal on the mechanism trying to force it to turn. The other magnet core in the game came out with relative ease. I am not at all happy with they way Stern assembled this part.

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#65 3 years ago

Oh...didn't realize it was out of the machine. I'd just buy a new assembly.

In my case, it was so mushroomed that I had to leave the assembly in the game, and work it out through the top. The threads did get rather torn up, which probably explains why it never seemed to get easier, even when it was close to being freed.

#66 3 years ago

crazy heat is the answer... way more heat than you think you need.

Use a butane torch.. and heat that sucker up for a few minutes.

1 year later
#67 1 year ago

6 year old thread for the win! I conquered a magnet core with lubricating spray, heat and an old coil stop.

AC1CA75F-190A-4640-BC07-36DC9F61E57B (resized).jpeg

#68 1 year ago

I used an impact driver and a socket and it was out in seconds.

#69 1 year ago
Quoted from pintechev:

I used an impact driver and a socket and it was out in seconds.

This is what I did, and it worked out great.

#70 1 year ago

Heat breaks down the Loctite. WD40 and similar sprays are useless, don't waste your time spraying.

Loctite holds firm regardless and one of it's "features" is that it is resistant to solvents (such as WD40).

If you use heat - and then apply mechanical pressure to undo the nut - it will give.

11 months later
#71 9 months ago

I just stumbled across this old thread while searching for a way to remove the magnet core from my SM. I've replaced many magnet cores over the years, but this is the first sucker I've encountered that just won't budge. The nut was hard to get off, but I eventually removed it with a crescent wrench and a hammer. The magnet core, however, seems impervious to everything I've thrown at it. Why the f*** would they loctite it in there? Isn't the whole purpose of the large nut to keep the core from moving?

After trying several methods to remove the core unsuccessfully, I've decided to just bite the bullet and order a new bracket and core. Fortunately, my core was not mushroomed, so I was easily able to remove it from the playfield and magnet. I needed to place a Pinball Life order anyway, so it's not really a big deal. In the end, it only cost me a little money and a lot of aggravation.

#72 9 months ago
Quoted from gweempose:

I just stumbled across this old thread while searching for a way to remove the magnet core from my SM. I've replaced many magnet cores over the years, but this is the first sucker I've encountered that just won't budge. The nut was hard to get off, but I eventually removed it with a crescent wrench and a hammer. The magnet core, however, seems impervious to everything I've thrown at it. Why the f*** would they loctite it in there? Isn't the whole purpose of the large nut to keep the core from moving?
After trying several methods to remove the core unsuccessfully, I've decided to just bite the bullet and order a new bracket and core. Fortunately, my core was not mushroomed, so I was easily able to remove it from the playfield and magnet. I needed to place a Pinball Life order anyway, so it's not really a big deal. In the end, it only cost me a little money and a lot of aggravation.

So you got it out of the PF whole, but can't get the core out of the bracket? Use heat from a butane torch.. that will break down any loctite.

I also find that the tool you use in the slot makes all the difference. I use the tooth of a crowbar lying sideways... as that gives me a nice long (14" or so) arm to get good leverage and it doesn't chew up the slot.

#73 9 months ago
Quoted from flynnibus:

I also find that the tool you use in the slot makes all the difference. I use the tooth of a crowbar lying sideways... as that gives me a nice long (14" or so) arm to get good leverage and it doesn't chew up the slot.

I attempted to use a hex key that perfectly fit the slot. I heated up the bolt with a heat gun on high for a couple minutes and then tried to turn the bolt. It wouldn't budge. I then whacked the hex key with a hammer and it snapped in half!

#74 9 months ago

Never had trouble with removing any magnet cores over the years. I use a combination wrench--it is well over a foot long, with a cold chisel acting like a big screwdriver to turn the core, no problem.

#75 9 months ago

I took the bracket out, put the whole thing in a vise and used an impact driver with the right sized socket and it came off very easily. But it is really in there. It’s amazing how much loctite they used.

#76 9 months ago
Quoted from gweempose:

I attempted to use a hex key that perfectly fit the slot. I heated up the bolt with a heat gun on high for a couple minutes and then tried to turn the bolt. It wouldn't budge. I then whacked the hex key with a hammer and it snapped in half!

FWIW... I use a nail puller similar to this (not this exact model)
vaughan-wrecking-pry-bars-b215h-64_1000 (resized).jpg

I can lay it sideways in the notch for almost a perfect fit.

Next time try a mallet instead of hammer Leverage is preferred to avoid snapping stuff.

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