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[MMBUFBerlin]

At first: I like the drive of the 103 train from KK Eishindo. It is not a good drive but it is useable to make a very good drive with it. To make this to a good drive, you need a worm, two gears type A with 20 teeth (or 16 teeth, if you have points on your layout) and a gear type B with 26 teeth (or 30 teeth in layouts with points), look drawing:

Gears

Gears_Modul_0-15.jpg (313.94 KiB) Viewed 857 times

Without points on your layout you get a reduction 20:1, with points on your layout you get a reduction 16:1, that is more than twice as much as the original drive has!
At first replace the wheel gears with ten teeth through the gears type A with 20 or 16 teeth.

Replace Gears

Replace_Gears.jpg (99.56 KiB) Viewed 857 times

Then drill a 0.6mm hole in the gear box of the 103 train (picture 1).

1

1.jpg (536.58 KiB) Viewed 857 times

Then cut the gear box (see red lines in picture 1 and 2).

2

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The holder for the gear type B is now finished (picture 3).

3

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Then glue the holder with the gear on the chassis (picture 4).

4

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Now you just have to put the motor on it and connect it electrically. The result is a drive that drives much slower and quieter than the original one.
As a result of this modification, almost every locomotive with two bogies can be made to drive by shortening the chassis (look picture 5).

5

5.jpg (351.74 KiB) Viewed 857 times

Good succeed!

[jesse6669]

This is a great tutorial. Thank you!!