20 votes
Accepted

How to disassemble LEGO train engine base part# 28743?

Here are some disassembly pictures and tips. Tools needed: Either a precision flat-head or Philips screwdriver: There are two flat-head/Phillips hybrid screws that hold the the battery cover down. ...
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  • 8,718
19 votes

Most inseparable combinations?

My son did some extensive research on this subject, which yielded this beauty: That’s a light bulb cover stuck into a Duplo stud. While it may look harmless, I found it impossible to get sufficient ...
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  • 2,154
18 votes
Accepted

What tool can get the Technic pin out from a connection closed in the other end?

Push the Technic pin in a beam hole, then insert a rod (antenna or minifig tool handle) into the hole in the pin from the other side. The rod will prevent the "lips" of the pin from closing in, ...
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  • 13.9k
16 votes
Accepted

How do I take out this pin from an axle connector?

I usually attach it to a Technic beam, then put something to fill the hole so it can't squeeze together and come out, to give a handle. The flexible rods tend to be a nice options for filling the ...
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15 votes
Accepted

Remove 3, maybe 4, decades old PVA glue from Lego

Take it for what it is, I am not a material scientist and this is not a guarantee that the following information will work in your case. I believe your approach is correct, or at least as good as you'...
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  • 899
12 votes

Can I safely dissassemble a 74569 motor (the old, fast 9v one)

Well, I opened it up without much success, and took some pictures of the process: At first I tried pushing/prying the light grey tabs away from the dark gray "bottom", but those weren't budging So ...
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  • 1,146
12 votes

Is there a tool that can consistently remove hundreds of 2x2 Tiles?

Try using the orange brick separator upside down. This is a trick I learned from someone who professionally works with LEGO. The lower angle makes it easier to go under the lip of the tiles and it is ...
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12 votes
Accepted

What is inside the LEGO Powered Up M motor?

Let's take a look. The first step to disassembling the motor is removing the small Philips screw on the bottom: Now there are a pair of gray tabs in the back white section that we need to release. I ...
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  • 34.5k
12 votes
Accepted

What is inside the Technic Powered Up XL motor?

I was curious about this, and TLG was willing to provide me with one of these motors, so I opened it up. I was able to get the outer shell off by cutting down the 4 tabs on the outside. This motor ...
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  • 34.5k
12 votes

Remove 3, maybe 4, decades old PVA glue from Lego

Self-answer to let you all know how things went. Warm water was having some effect but it took forever. So Saturday morning I went to the DIY store and got myself a 5 liter jerrycan of white vinegar. ...
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  • 1,170
10 votes
Accepted

Most inseparable combinations?

A 1x1 round plate on the bottom of a 1x1 square plate is pretty difficult to get apart. The Santa's Workshop set uses transparent 1x1 round plates stuck until 1x1 plates with a clip on top to make ...
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9 votes

What tool can get the Technic pin out from a connection closed in the other end?

I figured out a solution while waiting for answers. The tool I used for it was a universal T20 bit which most people have or can easily get access to. I took some documenting pictures of it which I ...
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  • 425
9 votes

How To Disassemble the LEGO Boost Hub?

Here's a YT vid on the disassembly, but the still picture shots with no commentary may not be what you need for a good walk-thru. I don't have a Hub, but wish we all had a pic to make sure we're ...
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  • 8,718
8 votes
Accepted

How to unplug black friction pin connectors

It depends in what type of beams the pin are mounted. For studless Nicael's methode is the easiest. Otherwise you can use method 3 For studded beams you can use variation on this methode. take a axle ...
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  • 7,403
8 votes

How to unplug black friction pin connectors

Take your cross axle: And push it into the hole where your pin connector had stuck
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  • 258
8 votes
Accepted

How can I separate an 8H antenna from a modified 1×1 with ring?

Ah, yes. I have had this problem a few times. Here's what I do: The first thing you're going to want is leverage. Connect one 1x6 plate to the underside of the Modified 1x1, one on top of the ...
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  • 1,433
7 votes

My poor minifig's head is stuck in his helmet!

A quick and easy way to remove a helmet stuck onto the head...I used a piece of Bounty kitchen roll, approximately 3cm x 3cm, (which is actually thicker then a single ply toilet tissue) and placed ...
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7 votes

Separate LEGO Technic wheel from 3 pin hub

The main trick is to simultaneously push all three pins of the hub: If you have another hub, and the wheel allows for this, take it and push carefully from the other side. If both hubs are half-way ...
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  • 2,154
7 votes
Accepted

Is this non-disassemblable LEGO instruction step real?

It turns out it is real, just not from a single set itself, but from the official instructions for a combo-model between Exo-Force models 7700-1: Stealth Hunter and 7701-1: Grand Titan to make ...
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7 votes

Selling complete sets, Assembled or Disassembled?

A good part of the LEGO experience is building the set. There is little joy in buying a LEGO set that was already built by someone else. So you are right, that a disassembled set is usually viewed as ...
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7 votes
Accepted

How to disassemble the propulsion wheels of the LEGO/DUPLO train engine base part# 28743 drivetrain?

My back wheels do the same thing. There is no metal axle that connects both back wheels like the axle design does for the front wheels, but I'm sure LEGO designed it that way. So, imagine the train'...
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  • 8,718
7 votes
Accepted

Take off a small 1x1 piece from bigger LEGO surface

Any part that has a stud on the surface can be fairly easily removed by using leverage from a different large part added to the top of it. This takes advantage of the inherent "clutch power" ...
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7 votes

What electronics are inside the SPIKE Prime angular motors?

Here's what the part looks like from the outside: The first step to opening it up is to remove the cover over a section of the drive. Note that this process is likely to cause permanent damage to the ...
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  • 34.5k
7 votes

Insert a gear into a turntable?

I'm struggling to understand why would there be a need to insert 24T gear inside turntable gear. If you need rigid connection - it is best to use existing attachment points for you assembly. Internal ...
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  • 20.1k
7 votes
Accepted

Insert a gear into a turntable?

Indeed I had to disassemble it (which went without much effort) but the 24 tooth fits fine: It can slip up or down for about half a stud but is stuck otherwise.
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6 votes

My poor minifig's head is stuck in his helmet!

I just removed a non-LEGO crown which was very very tight top on Nadakhan's head. It was so tight, it seemed that only destroying it could help. But my son loved the crown and especially head, so here ...
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6 votes

My poor minifig's head is stuck in his helmet!

Take some scotch tape and wrap it round the neck thing. Then you just put the head on and pull the helmet off. If that doesn't work, use more tape, it will make the head stay on the neck a little ...
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  • 61
6 votes

Can an axle be removed from this Technic 'brick paradox'?

I once got myself into a situation much like this. What I did was unfold a paperclip and insert the end of it into one of the four corners of open space of the hole that one of the axles was in. Then,...
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6 votes

What tool can get the Technic pin out from a connection closed in the other end?

Stick the pin end into a Technic hole (like in the middle of those two red bits), then stick a light saber rod into the pin, and pull the red bit. BOOM.
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  • 3,199
6 votes

Is there a way to set a flat plane at an angle to horizontal of less than 22.5 degrees, but more than 0?

Using a cut-pipe into a clip-with-tube will let you build a secure and precise angle. If you have a solid brick behind the headlight bricks you can fix the angle by cutting the pipe at the right ...
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  • 2,018

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