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Komatsu 930e

March 10th, 2013 Leave a comment Go to comments

Model of one of the largest dump trucks in existence. Features drive, steering, and dump mechanism.


Completion date: 02/03/2013
Power: electric (battery box)
Dimensions: length 53 studs / width 27 studs / height 26 studs
Weight: 2.106 kg
Suspension: front – independent / rear- live axle
Propulsion: 1 x PF XL motor geared 2.33:1
Motors: 1 x PF XL, 2 x PF Medium

Komatsu 930e is one of several very similar big dump trucks that are being used in world’s largest mines because they are more efficient than a fleet of smaller vehicles. I wanted to model it, using a studfull body on top of a heavily compacted studless chassis. My initial plan to use my servo gearbox in this model failed when it turned out that the model is too heavy for the Servo motor controlling the gearbox.

The model housed three motors, 2 large linear actuators and a few mechanisms in the space between axles. The available space has been used to the point where it was very difficult to make the wires fit in somewhere. The completed chassis was agile, with simple drivetrain that used the XL motor quite effectively, and with a very good steering lock. The body was relatively lightweight and did not affect the performance much. Most of it was built in a fairly traditional way, except for the very front which was built with studs facing forward.

The model was very simple and somewhat inaccurate. Still, it was fun to drive, and it provided a good experience in compacting mechanics and in combining studless/studfull structures. It was also one of my very few models that roughly fit the LEGO minifigure scale.

Work in progress photos:

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Categories: Trucks Tags: ,
  1. the.geremy
    April 2nd, 2015 at 11:07 | #1

    Hi, very nice model. I like it 🙂 I hope a can build it, even there are now building instructions 🙂

  2. Sariel
    March 2nd, 2014 at 09:37 | #2

    The Servo motor is on the first photo only, it was removed later.

  3. Witherley
    March 1st, 2014 at 21:31 | #3

    I noticed a typo! It says that it uses 2 M-motors and 1 XL motor but you can clearly see a servo motor in the work in progress photos. So would it be 1 XL, 1 servo and 1 M motor?

  4. Lennart
    January 4th, 2014 at 14:20 | #4

    Oh you mean lego bricks with studs or technic beams withoud studs, thanks.

  5. Sariel
    January 4th, 2014 at 13:44 | #5

    With studs and without studs.

  6. Lennart
    January 4th, 2014 at 12:57 | #6

    What does studfull and studless mean?

  7. Sariel
    December 16th, 2013 at 14:25 | #7


  8. ADI
    December 16th, 2013 at 10:03 | #8

    can i get the building instruction?

  9. Sariel
    March 17th, 2013 at 21:29 | #9

    To normalne.

  10. Mahonii
    March 17th, 2013 at 20:14 | #10

    Zawieszenia które robisz to po prostu dzieła sztuki. Genialnie zaplanowane, solidne i niezawodne. Świetne!
    Chciałbym zadać Ci pytanie odnośnie silników. Zauważyłem, że te czarne silniki, w kształcie litery L, są bardzo mocne gdy zasila je moduł wbudowanym battery boxem, odbiornikiem i serwem sterującym (używasz tych modułów do swoich supersamochodów). Natomiast w połączeniu ze zwykłym battery boxem z PF te silniki są wyjątkowo słabe. Czy ty też zauważyłeś coś takiego, czy to ja mam coś popsute?

  11. CJ 659
    March 14th, 2013 at 20:47 | #11

    wow, that is super tight, you did a really good job!!

    I cant wait to see the black panther and 8×8…

  12. SteveWandel
    March 13th, 2013 at 02:03 | #12

    I think the model isn’t quite wide enough, which is why it looks too tall and wheels too wide.

  13. lego tech
    March 12th, 2013 at 08:15 | #13

    are you going to make the instruction please do make i beg you

  14. jimmy3
    March 12th, 2013 at 02:33 | #14

    Sweet. That’s cool!

  15. Jürgen Jõeäär
    March 11th, 2013 at 20:16 | #15

    Nice project!!!

  16. Sariel
    March 11th, 2013 at 09:15 | #16

    I was thinking it’s more likely too tall rather than too wide. Also, the tires are a bit wider than the real ones.

  17. SteveWandel
    March 11th, 2013 at 00:54 | #17

    I’ve been trying to figure out why your model doesn’t look quite right because I’ve worked on mines with these machines. Found some pics on Flickr and it seems that your model isn’t wide enough compared to the height and length. So this makes the proportion look wrong. Maybe needs an extra 4 stud width.
    Really interested in the live axle you used. Pity the Lego motors aren’t short enough to install inside the axle line like in real life, but good effort to make it work.

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