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Home > Construction Equipment > JCB 180 Tracked Skid Steer Loader

JCB 180 Tracked Skid Steer Loader

February 14th, 2010 Leave a comment Go to comments

Model of a JCB skid steer loader. Features drive, steering, remotely raised arm, tilted bucked and working roof lights.

Datasheet:

Completion date: 14/02/2010
Power: electric (Power Functions)
Dimensions:  length 31 studs / width 18 studs / height 20 studs
Weight: 0.73 kg
Suspension: none
Motors: 3 x PF Medium, 1 x micromotor

No a long ago, I have come into posession of the LEGO micromotor, something I wanted to have for years. Micromotors are unique, hard to get at a reasonable price, and impossible to replace in certain cases. When I finally got mine, I wanted to use it to control the horizontal angle of the main gun’s barrel in my T28 model, but the model was almost complete by the time I got the motor. Then it occurred to me that the smallest project on my list could definitely use the micromotor.

JCB 180 is a simple tracked skid steer loader. There are plenty of skid steer loaders and I was never interested in building one, viewing them as simple and technically boring. The JCB 180, however, is one of few loaders with a single arm instead of two, and that makes it challenging.

My goal was to  achieve maximum functionality while showing as little mechanics as possible. I’ve spent quite a while trying to fit a small transverse subtractor into the chassis, but I had to admit that it’s too large at this scale eventually. Therefore the drivetrain is very simple: it consists of two PF Medium motors, each driving a single track. Third PF Medium motor drives the linear actuator that controls the loader’s arm. Having one arm instead of two turned out to be a blessing in disguise, as there was no space inside the hull to drive two linear actuators or to transfer the movement from one arm to another. The roof lights are a good example of how compact this model is: they are coupled with the micromotor, because there was no space to connect them elsewhere.

The micromotor was located at the end of the arm, and it proved quite easy to integrate into a liftarms-based structure. It uses 3:1 gear reduction to change the bucket’s angle. I did some capacity tests with Lucius the hamster (roughly 60 grams heavy), and he was able to stay on the bucket without causing any sort of mechanical malfunction. The capacity, however, is severely limited by the fragile bucket’s construction – the first bucket I made was so heavy that it tilted to the side in a very ugly way. The final bucket was optimized for minimum weight.

The model was built in less than a single day, and it could certainly be somewhat upgraded. But I was satisfied with its functionality and look anyway, and considered it a relaxing build, without the need to make it better & better. It was also Lucius’ first time to appear in the AFOLs’ world.

Photos:

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Video:

  1. Sariel
    August 5th, 2010 at 10:09 | #1

    @a.legobuilder
    They’re plastic, but more elastic one that the bigger tread links are made of.

  2. a.legobuilder
    August 5th, 2010 at 09:31 | #2

    i havent got any of the new small tread link, are they soft rubber or like the bigger treads; a hard plastic?

  3. Sariel
    May 10th, 2010 at 00:18 | #3

    @nico71
    I don’t want to hide anything. It’s just that I usually describe the internal construction of each model and adding internal photos to that would be often quite time-consuming.

  4. nico71
    May 9th, 2010 at 23:36 | #4

    Do you have some pictures of inside the model ? I notice that you don’t often show the inside. Maybe you want to hide your ideas, like a patent ?

    Nice moc a usual.

  5. NxT bUiLdEr
    February 20th, 2010 at 01:30 | #5

    @icanhaslego
    yes, hi lucius

  6. SamShady
    February 17th, 2010 at 22:19 | #6

    Very funny and breezy video 😀

  7. bobsurankle
    February 15th, 2010 at 21:07 | #7

    …Shame about the wobbly bucket, but other wise amazing for just 1 day. MY greetings to lucius.

  8. Mihály Stépán
    February 15th, 2010 at 17:39 | #8

    Nice! I was surprised that it isn’t THAT small 🙂 but clever design, anyway! My greetings to Lucius!

  9. Chili
    February 15th, 2010 at 15:16 | #9

    the bucket is quite wobbly, and i dont like the wires that show up.
    This model seems to be nice and good for fun driving, i just dont think you could do any real work with it.

  10. Sariel
    February 15th, 2010 at 10:06 | #10

    @b0kI
    I got mine for like $20. I think it’s worth it, I think it’s good to have at least one micromotor, because it’s irreplaceable in some situations, like here.

  11. b0kI
    February 15th, 2010 at 08:50 | #11

    I just love it! It’s sooooo cute! (yeah, both Lucius and the JCB 😀 ) By the way, how much did the micromotor cost? Wherever I go looking for it it’s 10, 15 or even 20 $ (bit’ pricey don’t you think?). I also wanted to know if it’s worth it. Could you please tell me? 😀

  12. tl8
    February 14th, 2010 at 23:57 | #12

    What a nice little sunday project 😛

    Good work 😀

  13. Sariel
    February 14th, 2010 at 22:29 | #13

    @icanhaslego
    I don’t really speak Spanish, but I understand most of it.

  14. icanhaslego
    February 14th, 2010 at 21:52 | #14

    sariel, hablas espanol?
    este modelo es muy bien, muy pequeno pero elegante. me gusta lucius tambien, y yo quiero ver el en el futuro.

  15. Sariel
    February 14th, 2010 at 20:04 | #15

    @owen
    Yes.
    Gear reduction 1.66:1 on each motor.

  16. owen
    February 14th, 2010 at 19:57 | #16

    are the m motors side by side( for driving)?
    are the drive motors slowed down any?

  17. Sariel
    February 14th, 2010 at 19:15 | #17

    @efferman
    Sort of.

  18. February 14th, 2010 at 19:08 | #18

    Looks cute the JCB, but it is bigger that it on the Pictures seems.
    btw, is this a new Mr Fluffy?

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