Questions tagged [trains]

A popular choice among AFOLs for building their own creations, Trains are now a sub-theme of LEGO City.

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DUPLO cargo train 10875 blue action brick has no effect

I bought my daughter Cargo Train 10875 and it all works OK with one exception—the blue action brick has no effect. The other action bricks all have some noticeable effect. I asked LEGO to send me a ...
8 votes
2 answers
2k views

DUPLO Train Action Bricks

I have the weirdest thing with my son's set. Currently one of the yellow action tiles honks the horn but the other yellow brick does not. No matter the lighting conditions, the position, orientation,...
12 votes
4 answers
8k views

Software to do Duplo train track layout?

Anyone know a way to create with a software DUPLO train track layout? The only thing I found is: http://www.anyrail.com/index_en.html It's a bit overkill for what I need and it's $US60, although ...
2 votes
2 answers
110 views

How to connect & program Powered Up train motor?

I'm new to LEGO and am trying to motorize my Hogwarts Express train. Per the LEGO site, I bought the 88011 Train Motor and the 88006 Move Hub. But I can't figure out how to use them. I connected the ...
24 votes
1 answer
8k views

How can I motorize the Hogwarts Express (76423)

I'd like to motorize this train set: What is the best way to accomplish this?
3 votes
2 answers
95 views

Getting more tracks for 9V trains [duplicate]

I own sets 4551 (Crocodile Locomotive) and 4583 (Load N' Haul Railroad). The rails are 9V conduction type with metal top. How can I get additional rail to extend my line? Can I use RC/PF rails and get ...
11 votes
4 answers
9k views

How do the DUPLO Action Bricks work?

Does anybody know what is the technology the DUPLO Action Bricks are based on? It is not any RFID or NFC because I printed out the white one on normal white paper which turns lights on/off. The symbol ...
3 votes
1 answer
119 views

DUPLO train engine base part# 28743 engine is not working

I've went through all of the steps here: How to disassemble the propulsion wheels of the LEGO/DUPLO train engine base part# 28743 drivetrain? which was a great learning exercise but unfortunately it ...
3 votes
0 answers
130 views

Building technique for modelling Thomas the Tank Engine faces

I'm building Thomas the Tank Engine trains, and I'm looking for techniques to build realistic faces. I'd like the trains be able to run on standard LEGO rails, so I'm targeting 8-wide engines. This ...
4 votes
2 answers
513 views

Does remote control 8879 work for winter holiday train?

Can anyone tell me if the remote control 8879 will actually stop and start the 10254 Winter Holiday Train set?
1 vote
0 answers
104 views

LEGO Express 60197 displays low battery

Using new batteries to power the controller - however on connecting the app using Bluetooth the status immediately shows low battery. Uninstalled the app and reinstalled it with new set of batteries, ...
6 votes
2 answers
2k views

Can the DUPLO My First Number Train fit on DUPLO tracks?

I have the My First Number Train set, pictured here. This set did not come with track. Other sets, such as My First Train set, pictured here, do come with track, but the wheels look different. Can ...
10 votes
6 answers
8k views

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

I have a push and go motor, also known as Hub No5 model also known as engine base part #28743 The issue I have is that the train can not climb the bridge anymore, unless using the locomotive alone ...
2 votes
2 answers
158 views

How to convert Passenger Train 7745 from 12V to Powered-Up?

I would like to convert the High-Speed City Express Passenger Train Set 7745 from the 12V track system to the Powered-Up system. It seems to be trivial to exchange the old wheels with the new wheels, ...
7 votes
2 answers
2k views

Why does my 60198 train get lots of wheel spin?

I was running my 60198 train with the 60197 carriages attached (carriages from 60198 also on the train). My train has started to get lots of wheel spin even while on flat ground. What can I do?
3 votes
3 answers
111 views

Replacement for the Rubber Rim of a 12V Train Motor

The 12V Train Motor Item No: 7865-1 needs a rubber train rim for traction. Unfortunately I could not find any new ones and the old rubber of used items dried out. The rim must be soft and rough, but ...
3 votes
2 answers
374 views

Convert 9V train to Powered Up

This is a follow-up from question "Can I convert my train 9V 4563 to the Power Functions motor?", now that Power Functions motors have been phased out in favour of Powered Up motors. How can ...
6 votes
1 answer
428 views

Why is there no set with much RC Straight tracks?

after visiting many Lego events (brickmania, antwerpen, BE), I wish to expand my train layout much more than adding a box or two of 7499 ... Why does Lego didn't released a set with, for example 24 ...
7 votes
3 answers
2k views

How do I make trains which fit LEGO rails (6 studs)?

Christmas is coming and my son (7) is asking for trains. I was planning to buy a set, but they are expensive, and I think it is a bit too advanced for my son. Therefore I decided to buy a box of ...
3 votes
2 answers
292 views

How to power on and adjust speed for a PU Train 88011

I'm doing a project for my kiddos. I'm trying to find the schematics of a lego train motor 88011, I want to control them using an ESP32 through a telegram bot. I have the ESP32 and the telegram bot ...
5 votes
1 answer
430 views

Can 9V train motors be linked and work together via the top power stud connection?

I'm building a MOC based on the 10219 Maersk Train, but going for the classic track power 9V system given the removal of need for batteries and slowly increasing availability of new 9V parts from ...
5 votes
2 answers
979 views

Identify this part, looks like a black handheld controller

Does anyone have information about this LEGO item? It appears to be an infrared controller. Maybe for an old LEGO train.
17 votes
1 answer
6k views

Why was the monorail system discontinued?

I'm a casual Lego enjoyer and decided to research some old sets and found out about the old monorail system. My question is why was it discontinued? It was a pretty neat system and I could see ...
0 votes
2 answers
217 views

Kazi train - struggles to run, maybe due to weight

I've ordered 2 Kazi trains on aliexpress. Seemed like a nice set with some tracks for my kids. As seen below it's a set where the power box is a separate part and it runs a motor that connects to the ...
34 votes
1 answer
42k views

What different types of LEGO train tracks exist?

I would like to purchase some used LEGO train tracks off of ebay. I am not, however, very familiar with the different choices of track systems are out there that I might come across. So I would like ...
46 votes
3 answers
34k views

Can LEGO City Powered Up trains be automated?

I have a LEGO City train set (60336): The set includes a remote control as well as an app that can be used to control the train. Is it possible to automate the operation of LEGO City trains, ideally ...
2 votes
2 answers
1k views

Looking for a way to connect SG90 servo motor to Lego Technic hole in a brick, in order to control Lego train track switch

After looking at this question: Can I remotely control the points on PF train tracks? I got the idea of controlling the train track switch handle using a servo motor that will be able to move the ...
3 votes
2 answers
2k views

Can I convert my train 9V 4563 to the Power Functions motor?

The motor of my locomotive is dead. I have two choices : repurchase it or buy a Power Functions replacement. It is possible of customize my train 4563 to use the Power Functions motor? If yes, what ...
6 votes
1 answer
261 views

Railway track layout - is there a method to say if track layout meets up

I'd 2 circles of original blue railway track, lost 1 inner, bought mixed batch of track off eBay, as more inner than outer bought more track & to get discount 12 outer & 4 inner to bring N° of ...
4 votes
1 answer
926 views

LEGO Duplo cargo train - traction problem on bridge

I bought my son a 10875 cargo train. The train is great for playing, but I have a problem with crossing the bridge. I saw that this is common problem with 10875 and 10874 LEGO Duplo trains, so I would ...
5 votes
0 answers
155 views

IR remote 8879 - cannot control speed of the motor

I got the 7938 train set for my kid. I hook up the battery to the receiver and try the IR remote 8879 with it. The motor starts running/spinning, but I can not control the speed with the orange "...
17 votes
3 answers
5k views

Can I remotely control the points on PF train tracks?

I'm interested in investing in power functions based trains, but want to automate switching points. Is this possible? What is the cheapest / easiest way of achieving this?
5 votes
1 answer
213 views

Do Duplo train cars with two female ends exist?

Most Duplo train cars have a male and a female connector, such as Duplo Car Base 2 x 6 with Red Wheels with Fake Bolts and Open Hitch End. Since most tractors, in the widest meaning of cars meant to ...
14 votes
4 answers
839 views

Train level crossing using 2021 road plates

I'm interested in integrating a train level crossing into a city layout using the new road plates, but I've been struggling to figure out the best way to do this. Here's an example level crossing for ...
9 votes
1 answer
2k views

Is there any difference in the power, wheel, and track technology between 2018 trains and 2022 trains?

LEGO came out with 60197 City Passenger Train and 60198 City Cargo Train in 2018. Much more recently they released very similar sets 60337 City Express Passenger Train and 60336 City Freight Train. ...
10 votes
2 answers
1k views

Alternative (back of box) builds of 7822 Railway Station - is there an 'official' configuration where the track terminates at the station?

I am looking for a scan or photo of the back of the box of the 7822 Railway Station Background: As is common with Lego sets, there are a number of alternative builds pictured on the back of the set ...
7 votes
5 answers
3k views

Choosing scale for train models: what scale is "L-gauge"?

So, after being a LEGO fan for 40+ years, I'd like to try my luck at building some scale models of train sets (for example, an ICE 2). In planning my build, I ran into some difficulties or doubts ...
10 votes
3 answers
6k views

How to run "Power Functions" devices from an electric wall plug?

In this video showing an example of Great Ball Contraption (GBC), we can see (at 1:35) that some trains powers are used to run Power Functions motors: That must be more convenient than having to ...
2 votes
1 answer
240 views

Where can I get replacement battery connectors for old Lego Duplo Train?

I have the same Duplo Train that Pieterjan posted a picture and video of in September ('Old Lego duplo train not working on batteries'). In my case, it is clear that the battery connectors are ...
18 votes
1 answer
3k views

What piece is this? It's a hard one, and a very small one. It's 2x1 I believe, and it could possibly be an accessory

This is the piece I'm looking for, because I'd like to build this microscale train myself. It may very well be the handles of two levers glued to the rest of the train, but I really don't want to ...
4 votes
1 answer
307 views

Do Duplo trains fit Megablock train tracks?

Do Duplo trains fit Megablock train tracks (given in the picture)? Note that all the Megablock 2x2, 2x4, etc blocks fit Duplo. I just have never heard about Megablock train tracks' compatibility.
8 votes
1 answer
400 views

Motor problems in 60051

The motor in my High Speed Passenger Train set (60051) has stopped working properly. I just put brand new batteries in and it acts just like if they were worn. Moreover, the little brown capacitor ...
4 votes
1 answer
503 views

Motorizing Crocodile Locomotive set 10277 - are there any sets that include hub & motor I need?

Crocodile Locomotive can be powered up by using 1 x 88009 and 1 x 88013. Reviews on hubs and motors strongly suggest it is better, financially, to buy them as part of the sets, not separately. Is ...
22 votes
3 answers
7k views

How to build bridge using 4.5/12v train rails from 1969 Lego brochure

I am interested in building a bridge for my layout and stumbled upon this forum post in which user 'Istokg' posted a picture of a train bridge made from the blue rails used in the pre-1980s train sets....
6 votes
2 answers
2k views

60197 Passenger Train control problem

Weird problem here. My son has had the 60197 train for about a year and I decided to try out the powered-up app for the first time today. After what seemed to be some kind of software update, which ...
7 votes
1 answer
1k views

Old Lego duplo train not working on batteries

I've recovered my old lego duplo set from the attic, and tried to get the electric train working again. After inserting fully charged batteries, the train does start, but it's unable to pull even a ...
2 votes
2 answers
2k views

Duplo 10874 engine lacks sound without app

I have inherited this set which works perfectly apart from the fact that there is no sound from the engine. It clearly reads all the colours on the action bricks because, when used with the app, the ...
11 votes
3 answers
1k views

What was the 12v AC socket for on the 7864 transformer?

The 7864 transformer had, in addition of the main regulated outlet for controlling trains and a fixed 12v DC for plugging in remote controls and lights, a third socket available which provided 12v AC. ...
8 votes
2 answers
1k views

Minimal mine track

I want to create a mine scene on a 32x32 baseplate. I want to run a train track across the front, and then about 12 studs into the mine. Then, I want to build a couple simple mining carts on the ...
13 votes
6 answers
4k views

Can I build a faster LEGO train motor?

I was going over LEGO Power Functions train motors, and I was not satisfied with the speed. Speed seven is fast enough to derail the train on the curve, but not fast enough realistically. I am ...