We have a problem with an excess of cat and dog hair in our house (next pet will be hairless, dog or cat). A further problem is that the hair ends up tangled in Henry's Brio electric locomotive, causing balky or no movement. So here is how I clean a Brio electric locomotive.
Remove the battery cover and battery
Grind the tip of an Allen wrench so it has a triangular tip that matches the screw heads on the underside of the train. It doesn't take much and a slight taper will help it lock into the screw so it doesn't strip the screw. They do not have a lot of torque and are easy to remove.
Invert the locomotive on a block and remove the screws. Notice the "Do Not Remove" warning sticker. Ignore it, it's a $15.00 toy and it will clog up all the time. Swedish engineering does not take poor housekeeping into consideration when designing a child's toy. I guess all the engineers have housekeepers. Elitist jerks! Making poor women slave away in drudgery so that their toys will run without a hitch.
See the geartrain, upside down. Notice all the hairs wrapped up in the gear train.
The bottom half of the train. You need to move the gear clusters over to it, starting with the drive wheel axle and continuing in order from back to front. Clean each gear cluster of hair and dirt as you go. If the gears fall off of a particular cluster, thank your lucky stars that you already have a digital picture. This is a good time to mention taking pictures as you go. The gear clusters will obviously need to be revolved 180 degrees so that they are a mirror image of the placement on the top half. (In other words, don't just move them over, flip them over)
Here the gears have been cleaned and replaced in the bottom half.
Here is another view of the completed assembly of the bottom half.
The ball of hair I removed and the tip of the Allen wrench.
Henry helps put the battery compartment back on.