Repairing a Lego Duplo train engine
This time, I will repair my daughter’s Lego Duplo train engine. It is from a Train Deluxe LegoDuplo 10508 set, but I found two issues.
First of all, the locomotive has to make “Tchou Tchou” sounds, but it remains silent. It is an advantage for my dad’s ears, but I like to fix everything.
Secondly, the locomotive is slipping and cannot climb the bridge hill properly.
Train engine teardown
Here is the train engine I disassembled.
The first step is to remove the battery cover. It can be extracted by removing the two indicated screws.
The three screws holding the red top part of the locomotive and the bottom part must now be removed.
To remove the top cover, you will need to be patient. There are four plastic clips to remove.
- Insert two small flat screwdrivers between the red and black plastic part on the outside.
- Carefully lift the top cover.
The operation will have to be repeated twice, once for the front and once for the back.
I had a lot of trouble, the opening is not easy.
If by mistake you have broken one or more fasteners, do not panic. The screws underneath will still maintain the top cover correctly.
Here is a video that can help:
After a lot of patience, the top cover finally comes off.
Replacing the speaker
So we can move on to repairing the loudspeaker.
I found that the speaker producing the sounds is broken, its small PCB is simply detached. It feels like a violent shock, like a locomotive flying through the room during an epic child war. 👿
I was able to order a small loudspeaker on AliExpress for a few euros and it arrived few weeks after.
Repair of the engine gear
To repair the motor part, first remove the two screws indicated which are holding the gear unit in place.
To take out the motor, the two parts of the gear unit must be carefully separated, it is then possible to take out the motor.
In my case, I noticed that the plastic motor output gear was detached from the motor shaft. As soon as the slope to be climbed by the locomotive was too steep, the motor shaft was turning alone without its gear.
So I added some Cyanolite glue (super glue) at the indicated place and reassembled the gear.
Now that everything is fixed, I have put everything back together.
Another small victory over the machine, this Duplo locomotive works perfectly again. My daughters are happy and can play again at the little railwayman.